From 5a0e3ad6af8660be21ca98a971cd00f331318c05 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 24 Mar 2010 17:04:11 +0900 Subject: include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn --- drivers/mtd/lpddr/lpddr_cmds.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/mtd/lpddr/lpddr_cmds.c') diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c index e22ca49583e7..a73ee12aad81 100644 --- a/drivers/mtd/lpddr/lpddr_cmds.c +++ b/drivers/mtd/lpddr/lpddr_cmds.c @@ -26,6 +26,7 @@ */ #include #include +#include static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len, size_t *retlen, u_char *buf); -- cgit v1.2.3 From c4e773764cead9358fd4b036d1b883fff3968513 Mon Sep 17 00:00:00 2001 From: Stefani Seibold Date: Sun, 18 Apr 2010 22:46:44 +0200 Subject: mtd: fix a huge latency problem in the MTD CFI and LPDDR flash drivers. The use of a memcpy() during a spinlock operation will cause very long thread context switch delays if the flash chip bandwidth is low and the data to be copied large, because a spinlock will disable preemption. For example: A flash with 6,5 MB/s bandwidth will cause under ubifs, which request sometimes 128 KiB (the flash erase size), a preemption delay of 20 milliseconds. High priority threads will not be served during this time, regardless whether this threads access the flash or not. This behavior breaks real time. The patch changes all the use of spin_lock operations for xxxx->mutex into mutex operations, which is exact what the name says and means. I have checked the code of the drivers and there is no use of atomic pathes like interrupt or timers. The mtdoops facility will also not be used by this drivers. So it is dave to replace the spin_lock against mutex. There is no performance regression since the mutex is normally not acquired. Changelog: 06.03.2010 First release 26.03.2010 Fix mutex[1] issue and tested it for compile failure Signed-off-by: Stefani Seibold Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/chips/cfi_cmdset_0001.c | 131 +++++++++++++++++----------------- drivers/mtd/chips/cfi_cmdset_0002.c | 122 ++++++++++++++++---------------- drivers/mtd/chips/cfi_cmdset_0020.c | 136 ++++++++++++++++++------------------ drivers/mtd/chips/fwh_lock.h | 6 +- drivers/mtd/chips/gen_probe.c | 3 +- drivers/mtd/lpddr/lpddr_cmds.c | 79 +++++++++++---------- include/linux/mtd/flashchip.h | 4 +- 7 files changed, 239 insertions(+), 242 deletions(-) (limited to 'drivers/mtd/lpddr/lpddr_cmds.c') diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index 92530433c11c..62f3ea9de848 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -725,8 +725,7 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd, /* those should be reset too since they create memory references. */ init_waitqueue_head(&chip->wq); - spin_lock_init(&chip->_spinlock); - chip->mutex = &chip->_spinlock; + mutex_init(&chip->mutex); chip++; } } @@ -772,9 +771,9 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) break; - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); /* Someone else might have been playing with it. */ return -EAGAIN; } @@ -821,9 +820,9 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long return -EIO; } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. So we can just loop here. */ } @@ -850,10 +849,10 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long sleep: set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); return -EAGAIN; } } @@ -899,20 +898,20 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr * it'll happily send us to sleep. In any case, when * get_chip returns success we're clear to go ahead. */ - ret = spin_trylock(contender->mutex); + ret = mutex_trylock(&contender->mutex); spin_unlock(&shared->lock); if (!ret) goto retry; - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); ret = chip_ready(map, contender, contender->start, mode); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (ret == -EAGAIN) { - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); goto retry; } if (ret) { - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); return ret; } spin_lock(&shared->lock); @@ -921,10 +920,10 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr * in FL_SYNCING state. Put contender and retry. */ if (chip->state == FL_SYNCING) { put_chip(map, contender, contender->start); - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); goto retry; } - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); } /* Check if we already have suspended erase @@ -934,10 +933,10 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr spin_unlock(&shared->lock); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); goto retry; } @@ -967,12 +966,12 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad if (shared->writing && shared->writing != chip) { /* give back ownership to who we loaned it from */ struct flchip *loaner = shared->writing; - spin_lock(loaner->mutex); + mutex_lock(&loaner->mutex); spin_unlock(&shared->lock); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); put_chip(map, loaner, loaner->start); - spin_lock(chip->mutex); - spin_unlock(loaner->mutex); + mutex_lock(&chip->mutex); + mutex_unlock(&loaner->mutex); wake_up(&chip->wq); return; } @@ -1142,7 +1141,7 @@ static int __xipram xip_wait_for_operation( (void) map_read(map, adr); xip_iprefetch(); local_irq_enable(); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); xip_iprefetch(); cond_resched(); @@ -1152,15 +1151,15 @@ static int __xipram xip_wait_for_operation( * a suspended erase state. If so let's wait * until it's done. */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); while (chip->state != newstate) { DECLARE_WAITQUEUE(wait, current); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); } /* Disallow XIP again */ local_irq_disable(); @@ -1216,10 +1215,10 @@ static int inval_cache_and_wait_for_operation( int chip_state = chip->state; unsigned int timeo, sleep_time, reset_timeo; - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); if (inval_len) INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); timeo = chip_op_time_max; if (!timeo) @@ -1239,7 +1238,7 @@ static int inval_cache_and_wait_for_operation( } /* OK Still waiting. Drop the lock, wait a while and retry. */ - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); if (sleep_time >= 1000000/HZ) { /* * Half of the normal delay still remaining @@ -1254,17 +1253,17 @@ static int inval_cache_and_wait_for_operation( cond_resched(); timeo--; } - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); while (chip->state != chip_state) { /* Someone's suspended the operation: sleep */ DECLARE_WAITQUEUE(wait, current); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); } if (chip->erase_suspended && chip_state == FL_ERASING) { /* Erase suspend occured while sleep: reset timeout */ @@ -1300,7 +1299,7 @@ static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t a /* Ensure cmd read/writes are aligned. */ cmd_addr = adr & ~(map_bankwidth(map)-1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, cmd_addr, FL_POINT); @@ -1311,7 +1310,7 @@ static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t a chip->state = FL_POINT; chip->ref_point_counter++; } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1396,7 +1395,7 @@ static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len) else thislen = len; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_POINT) { chip->ref_point_counter--; if(chip->ref_point_counter == 0) @@ -1405,7 +1404,7 @@ static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len) printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */ put_chip(map, chip, chip->start); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); len -= thislen; ofs = 0; @@ -1424,10 +1423,10 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof /* Ensure cmd read/writes are aligned. */ cmd_addr = adr & ~(map_bankwidth(map)-1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, cmd_addr, FL_READY); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1441,7 +1440,7 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof put_chip(map, chip, cmd_addr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } @@ -1504,10 +1503,10 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, return -EINVAL; } - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, mode); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1553,7 +1552,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, xip_enable(map, chip, adr); out: put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1662,10 +1661,10 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, /* Let's determine this according to the interleave only once */ write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, cmd_adr, FL_WRITING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1796,7 +1795,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, xip_enable(map, chip, cmd_adr); out: put_chip(map, chip, cmd_adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1875,10 +1874,10 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, adr += chip->start; retry: - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_ERASING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1934,7 +1933,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, } else if (chipstatus & 0x20 && retries--) { printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); goto retry; } else { printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); @@ -1946,7 +1945,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, xip_enable(map, chip, adr); out: put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1979,7 +1978,7 @@ static void cfi_intelext_sync (struct mtd_info *mtd) for (i=0; !ret && inumchips; i++) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, chip->start, FL_SYNCING); if (!ret) { @@ -1990,7 +1989,7 @@ static void cfi_intelext_sync (struct mtd_info *mtd) * with the chip now anyway. */ } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } /* Unlock the chips again */ @@ -1998,14 +1997,14 @@ static void cfi_intelext_sync (struct mtd_info *mtd) for (i--; i >=0; i--) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_SYNCING) { chip->state = chip->oldstate; chip->oldstate = FL_READY; wake_up(&chip->wq); } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } } @@ -2051,10 +2050,10 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip adr += chip->start; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_LOCKING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -2088,7 +2087,7 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip xip_enable(map, chip, adr); out: put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -2153,10 +2152,10 @@ do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, struct cfi_private *cfi = map->fldrv_priv; int ret; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -2175,7 +2174,7 @@ do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); put_chip(map, chip, chip->start); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } @@ -2450,7 +2449,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd) for (i=0; !ret && inumchips; i++) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); switch (chip->state) { case FL_READY: @@ -2482,7 +2481,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd) case FL_PM_SUSPENDED: break; } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } /* Unlock the chips again */ @@ -2491,7 +2490,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd) for (i--; i >=0; i--) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_PM_SUSPENDED) { /* No need to force it into a known state here, @@ -2501,7 +2500,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd) chip->oldstate = FL_READY; wake_up(&chip->wq); } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } } @@ -2542,7 +2541,7 @@ static void cfi_intelext_resume(struct mtd_info *mtd) chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); /* Go to known state. Chip may have been power cycled */ if (chip->state == FL_PM_SUSPENDED) { @@ -2551,7 +2550,7 @@ static void cfi_intelext_resume(struct mtd_info *mtd) wake_up(&chip->wq); } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } if ((mtd->flags & MTD_POWERUP_LOCK) @@ -2571,14 +2570,14 @@ static int cfi_intelext_reset(struct mtd_info *mtd) /* force the completion of any ongoing operation and switch to array mode so any bootloader in flash is accessible for soft reboot. */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); if (!ret) { map_write(map, CMD(0xff), chip->start); chip->state = FL_SHUTDOWN; put_chip(map, chip, chip->start); } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } return 0; diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index ea2a7f66ddf9..c93e47d21ce0 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -565,9 +565,9 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); return -EIO; } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); /* Someone else might have been playing with it. */ goto retry; } @@ -611,9 +611,9 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr return -EIO; } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. So we can just loop here. */ } @@ -637,10 +637,10 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr sleep: set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); goto resettime; } } @@ -772,7 +772,7 @@ static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, (void) map_read(map, adr); xip_iprefetch(); local_irq_enable(); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); xip_iprefetch(); cond_resched(); @@ -782,15 +782,15 @@ static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, * a suspended erase state. If so let's wait * until it's done. */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); while (chip->state != FL_XIP_WHILE_ERASING) { DECLARE_WAITQUEUE(wait, current); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); } /* Disallow XIP again */ local_irq_disable(); @@ -852,17 +852,17 @@ static void __xipram xip_udelay(struct map_info *map, struct flchip *chip, #define UDELAY(map, chip, adr, usec) \ do { \ - spin_unlock(chip->mutex); \ + mutex_unlock(&chip->mutex); \ cfi_udelay(usec); \ - spin_lock(chip->mutex); \ + mutex_lock(&chip->mutex); \ } while (0) #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \ do { \ - spin_unlock(chip->mutex); \ + mutex_unlock(&chip->mutex); \ INVALIDATE_CACHED_RANGE(map, adr, len); \ cfi_udelay(usec); \ - spin_lock(chip->mutex); \ + mutex_lock(&chip->mutex); \ } while (0) #endif @@ -878,10 +878,10 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof /* Ensure cmd read/writes are aligned. */ cmd_addr = adr & ~(map_bankwidth(map)-1); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, cmd_addr, FL_READY); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -894,7 +894,7 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof put_chip(map, chip, cmd_addr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } @@ -948,7 +948,7 @@ static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chi struct cfi_private *cfi = map->fldrv_priv; retry: - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state != FL_READY){ #if 0 @@ -957,7 +957,7 @@ static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chi set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); @@ -986,7 +986,7 @@ static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chi cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); wake_up(&chip->wq); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } @@ -1055,10 +1055,10 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, adr += chip->start; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_WRITING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1101,11 +1101,11 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + (HZ / 2); /* FIXME */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); continue; } @@ -1137,7 +1137,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, op_done: chip->state = FL_READY; put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1169,7 +1169,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, map_word tmp_buf; retry: - spin_lock(cfi->chips[chipnum].mutex); + mutex_lock(&cfi->chips[chipnum].mutex); if (cfi->chips[chipnum].state != FL_READY) { #if 0 @@ -1178,7 +1178,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&cfi->chips[chipnum].wq, &wait); - spin_unlock(cfi->chips[chipnum].mutex); + mutex_unlock(&cfi->chips[chipnum].mutex); schedule(); remove_wait_queue(&cfi->chips[chipnum].wq, &wait); @@ -1192,7 +1192,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, /* Load 'tmp_buf' with old contents of flash */ tmp_buf = map_read(map, bus_ofs+chipstart); - spin_unlock(cfi->chips[chipnum].mutex); + mutex_unlock(&cfi->chips[chipnum].mutex); /* Number of bytes to copy from buffer */ n = min_t(int, len, map_bankwidth(map)-i); @@ -1247,7 +1247,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, map_word tmp_buf; retry1: - spin_lock(cfi->chips[chipnum].mutex); + mutex_lock(&cfi->chips[chipnum].mutex); if (cfi->chips[chipnum].state != FL_READY) { #if 0 @@ -1256,7 +1256,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&cfi->chips[chipnum].wq, &wait); - spin_unlock(cfi->chips[chipnum].mutex); + mutex_unlock(&cfi->chips[chipnum].mutex); schedule(); remove_wait_queue(&cfi->chips[chipnum].wq, &wait); @@ -1269,7 +1269,7 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, tmp_buf = map_read(map, ofs + chipstart); - spin_unlock(cfi->chips[chipnum].mutex); + mutex_unlock(&cfi->chips[chipnum].mutex); tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); @@ -1304,10 +1304,10 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, adr += chip->start; cmd_adr = adr; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_WRITING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1362,11 +1362,11 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + (HZ / 2); /* FIXME */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); continue; } @@ -1394,7 +1394,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, op_done: chip->state = FL_READY; put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1494,10 +1494,10 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) adr = cfi->addr_unlock1; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_WRITING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1530,10 +1530,10 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) /* Someone's suspended the erase. Sleep */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); continue; } if (chip->erase_suspended) { @@ -1567,7 +1567,7 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) chip->state = FL_READY; xip_enable(map, chip, adr); put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1582,10 +1582,10 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, adr += chip->start; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_ERASING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1618,10 +1618,10 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, /* Someone's suspended the erase. Sleep */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); continue; } if (chip->erase_suspended) { @@ -1657,7 +1657,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, chip->state = FL_READY; put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1709,7 +1709,7 @@ static int do_atmel_lock(struct map_info *map, struct flchip *chip, struct cfi_private *cfi = map->fldrv_priv; int ret; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr + chip->start, FL_LOCKING); if (ret) goto out_unlock; @@ -1735,7 +1735,7 @@ static int do_atmel_lock(struct map_info *map, struct flchip *chip, ret = 0; out_unlock: - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1745,7 +1745,7 @@ static int do_atmel_unlock(struct map_info *map, struct flchip *chip, struct cfi_private *cfi = map->fldrv_priv; int ret; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING); if (ret) goto out_unlock; @@ -1763,7 +1763,7 @@ static int do_atmel_unlock(struct map_info *map, struct flchip *chip, ret = 0; out_unlock: - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -1791,7 +1791,7 @@ static void cfi_amdstd_sync (struct mtd_info *mtd) chip = &cfi->chips[i]; retry: - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); switch(chip->state) { case FL_READY: @@ -1805,7 +1805,7 @@ static void cfi_amdstd_sync (struct mtd_info *mtd) * with the chip now anyway. */ case FL_SYNCING: - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); break; default: @@ -1813,7 +1813,7 @@ static void cfi_amdstd_sync (struct mtd_info *mtd) set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); @@ -1828,13 +1828,13 @@ static void cfi_amdstd_sync (struct mtd_info *mtd) for (i--; i >=0; i--) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_SYNCING) { chip->state = chip->oldstate; wake_up(&chip->wq); } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } } @@ -1850,7 +1850,7 @@ static int cfi_amdstd_suspend(struct mtd_info *mtd) for (i=0; !ret && inumchips; i++) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); switch(chip->state) { case FL_READY: @@ -1870,7 +1870,7 @@ static int cfi_amdstd_suspend(struct mtd_info *mtd) ret = -EAGAIN; break; } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } /* Unlock the chips again */ @@ -1879,13 +1879,13 @@ static int cfi_amdstd_suspend(struct mtd_info *mtd) for (i--; i >=0; i--) { chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_PM_SUSPENDED) { chip->state = chip->oldstate; wake_up(&chip->wq); } - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } } @@ -1904,7 +1904,7 @@ static void cfi_amdstd_resume(struct mtd_info *mtd) chip = &cfi->chips[i]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_PM_SUSPENDED) { chip->state = FL_READY; @@ -1914,7 +1914,7 @@ static void cfi_amdstd_resume(struct mtd_info *mtd) else printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); } } diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c index 0667a671525d..e54e8c169d76 100644 --- a/drivers/mtd/chips/cfi_cmdset_0020.c +++ b/drivers/mtd/chips/cfi_cmdset_0020.c @@ -265,7 +265,7 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof timeo = jiffies + HZ; retry: - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* Check that the chip's ready to talk to us. * If it's in FL_ERASING state, suspend it and make it talk now. @@ -296,15 +296,15 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof /* make sure we're in 'read status' mode */ map_write(map, CMD(0x70), cmd_addr); chip->state = FL_ERASING; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "Chip not ready after erase " "suspended: status = 0x%lx\n", status.x[0]); return -EIO; } - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); } suspended = 1; @@ -335,13 +335,13 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof /* Urgh. Chip not yet ready to talk to us. */ if (time_after(jiffies, timeo)) { - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "waiting for chip to be ready timed out in read. WSM status = %lx\n", status.x[0]); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); goto retry; @@ -351,7 +351,7 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof someone changes the status */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + HZ; @@ -376,7 +376,7 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof } wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } @@ -445,7 +445,7 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, #ifdef DEBUG_CFI_FEATURES printk("%s: chip->state[%d]\n", __func__, chip->state); #endif - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* Check that the chip's ready to talk to us. * Later, we can actually think about interrupting it @@ -470,14 +470,14 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, break; /* Urgh. Chip not yet ready to talk to us. */ if (time_after(jiffies, timeo)) { - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "waiting for chip to be ready timed out in buffer write Xstatus = %lx, status = %lx\n", status.x[0], map_read(map, cmd_adr).x[0]); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); goto retry; @@ -486,7 +486,7 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, someone changes the status */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + HZ; @@ -503,16 +503,16 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, if (map_word_andequal(map, status, status_OK, status_OK)) break; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); if (++z > 100) { /* Argh. Not ready for write to buffer */ DISABLE_VPP(map); map_write(map, CMD(0x70), cmd_adr); chip->state = FL_STATUS; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "Chip not ready for buffer write. Xstatus = %lx\n", status.x[0]); return -EIO; } @@ -532,9 +532,9 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, map_write(map, CMD(0xd0), cmd_adr); chip->state = FL_WRITING; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(chip->buffer_write_time); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); timeo = jiffies + (HZ/2); z = 0; @@ -543,11 +543,11 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, /* Someone's suspended the write. Sleep */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + (HZ / 2); /* FIXME */ - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); continue; } @@ -563,16 +563,16 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, map_write(map, CMD(0x70), adr); chip->state = FL_STATUS; DISABLE_VPP(map); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n"); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); z++; - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); } if (!z) { chip->buffer_write_time--; @@ -596,11 +596,11 @@ static inline int do_write_buffer(struct map_info *map, struct flchip *chip, /* put back into read status register mode */ map_write(map, CMD(0x70), adr); wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return map_word_bitsset(map, status, CMD(0x02)) ? -EROFS : -EIO; } wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } @@ -749,7 +749,7 @@ static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, u timeo = jiffies + HZ; retry: - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* Check that the chip's ready to talk to us. */ switch (chip->state) { @@ -766,13 +766,13 @@ retry: /* Urgh. Chip not yet ready to talk to us. */ if (time_after(jiffies, timeo)) { - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "waiting for chip to be ready timed out in erase\n"); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); goto retry; @@ -781,7 +781,7 @@ retry: someone changes the status */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + HZ; @@ -797,9 +797,9 @@ retry: map_write(map, CMD(0xD0), adr); chip->state = FL_ERASING; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); msleep(1000); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* FIXME. Use a timer to check this, and return immediately. */ /* Once the state machine's known to be working I'll do that */ @@ -810,11 +810,11 @@ retry: /* Someone's suspended the erase. Sleep */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + (HZ*20); /* FIXME */ - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); continue; } @@ -828,14 +828,14 @@ retry: chip->state = FL_STATUS; printk(KERN_ERR "waiting for erase to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); DISABLE_VPP(map); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); } DISABLE_VPP(map); @@ -878,7 +878,7 @@ retry: printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus); timeo = jiffies + HZ; chip->state = FL_STATUS; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); goto retry; } printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus); @@ -887,7 +887,7 @@ retry: } wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -995,7 +995,7 @@ static void cfi_staa_sync (struct mtd_info *mtd) chip = &cfi->chips[i]; retry: - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); switch(chip->state) { case FL_READY: @@ -1009,7 +1009,7 @@ static void cfi_staa_sync (struct mtd_info *mtd) * with the chip now anyway. */ case FL_SYNCING: - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); break; default: @@ -1017,7 +1017,7 @@ static void cfi_staa_sync (struct mtd_info *mtd) set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); @@ -1030,13 +1030,13 @@ static void cfi_staa_sync (struct mtd_info *mtd) for (i--; i >=0; i--) { chip = &cfi->chips[i]; - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_SYNCING) { chip->state = chip->oldstate; wake_up(&chip->wq); } - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); } } @@ -1054,7 +1054,7 @@ static inline int do_lock_oneblock(struct map_info *map, struct flchip *chip, un timeo = jiffies + HZ; retry: - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* Check that the chip's ready to talk to us. */ switch (chip->state) { @@ -1071,13 +1071,13 @@ retry: /* Urgh. Chip not yet ready to talk to us. */ if (time_after(jiffies, timeo)) { - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "waiting for chip to be ready timed out in lock\n"); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); goto retry; @@ -1086,7 +1086,7 @@ retry: someone changes the status */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + HZ; @@ -1098,9 +1098,9 @@ retry: map_write(map, CMD(0x01), adr); chip->state = FL_LOCKING; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); msleep(1000); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* FIXME. Use a timer to check this, and return immediately. */ /* Once the state machine's known to be working I'll do that */ @@ -1118,21 +1118,21 @@ retry: chip->state = FL_STATUS; printk(KERN_ERR "waiting for lock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); DISABLE_VPP(map); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); } /* Done and happy. */ chip->state = FL_STATUS; DISABLE_VPP(map); wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) @@ -1203,7 +1203,7 @@ static inline int do_unlock_oneblock(struct map_info *map, struct flchip *chip, timeo = jiffies + HZ; retry: - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* Check that the chip's ready to talk to us. */ switch (chip->state) { @@ -1220,13 +1220,13 @@ retry: /* Urgh. Chip not yet ready to talk to us. */ if (time_after(jiffies, timeo)) { - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); printk(KERN_ERR "waiting for chip to be ready timed out in unlock\n"); return -EIO; } /* Latency issues. Drop the lock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); goto retry; @@ -1235,7 +1235,7 @@ retry: someone changes the status */ set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); timeo = jiffies + HZ; @@ -1247,9 +1247,9 @@ retry: map_write(map, CMD(0xD0), adr); chip->state = FL_UNLOCKING; - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); msleep(1000); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* FIXME. Use a timer to check this, and return immediately. */ /* Once the state machine's known to be working I'll do that */ @@ -1267,21 +1267,21 @@ retry: chip->state = FL_STATUS; printk(KERN_ERR "waiting for unlock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); DISABLE_VPP(map); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return -EIO; } /* Latency issues. Drop the unlock, wait a while and retry */ - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); cfi_udelay(1); - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); } /* Done and happy. */ chip->state = FL_STATUS; DISABLE_VPP(map); wake_up(&chip->wq); - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) @@ -1334,7 +1334,7 @@ static int cfi_staa_suspend(struct mtd_info *mtd) for (i=0; !ret && inumchips; i++) { chip = &cfi->chips[i]; - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); switch(chip->state) { case FL_READY: @@ -1354,7 +1354,7 @@ static int cfi_staa_suspend(struct mtd_info *mtd) ret = -EAGAIN; break; } - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); } /* Unlock the chips again */ @@ -1363,7 +1363,7 @@ static int cfi_staa_suspend(struct mtd_info *mtd) for (i--; i >=0; i--) { chip = &cfi->chips[i]; - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_PM_SUSPENDED) { /* No need to force it into a known state here, @@ -1372,7 +1372,7 @@ static int cfi_staa_suspend(struct mtd_info *mtd) chip->state = chip->oldstate; wake_up(&chip->wq); } - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); } } @@ -1390,7 +1390,7 @@ static void cfi_staa_resume(struct mtd_info *mtd) chip = &cfi->chips[i]; - spin_lock_bh(chip->mutex); + mutex_lock(&chip->mutex); /* Go to known state. Chip may have been power cycled */ if (chip->state == FL_PM_SUSPENDED) { @@ -1399,7 +1399,7 @@ static void cfi_staa_resume(struct mtd_info *mtd) wake_up(&chip->wq); } - spin_unlock_bh(chip->mutex); + mutex_unlock(&chip->mutex); } } diff --git a/drivers/mtd/chips/fwh_lock.h b/drivers/mtd/chips/fwh_lock.h index 57e0e4e921f9..d18064977192 100644 --- a/drivers/mtd/chips/fwh_lock.h +++ b/drivers/mtd/chips/fwh_lock.h @@ -58,10 +58,10 @@ static int fwh_xxlock_oneblock(struct map_info *map, struct flchip *chip, * to flash memory - that means that we don't have to check status * and timeout. */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, adr, FL_LOCKING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -72,7 +72,7 @@ static int fwh_xxlock_oneblock(struct map_info *map, struct flchip *chip, /* Done and happy. */ chip->state = chip->oldstate; put_chip(map, chip, adr); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return 0; } diff --git a/drivers/mtd/chips/gen_probe.c b/drivers/mtd/chips/gen_probe.c index e2dc96441e05..fcc1bc02c8a2 100644 --- a/drivers/mtd/chips/gen_probe.c +++ b/drivers/mtd/chips/gen_probe.c @@ -155,8 +155,7 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi pchip->start = (i << cfi.chipshift); pchip->state = FL_READY; init_waitqueue_head(&pchip->wq); - spin_lock_init(&pchip->_spinlock); - pchip->mutex = &pchip->_spinlock; + mutex_init(&pchip->mutex); } } diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c index e22ca49583e7..eb6f437ca9ec 100644 --- a/drivers/mtd/lpddr/lpddr_cmds.c +++ b/drivers/mtd/lpddr/lpddr_cmds.c @@ -106,8 +106,7 @@ struct mtd_info *lpddr_cmdset(struct map_info *map) /* those should be reset too since they create memory references. */ init_waitqueue_head(&chip->wq); - spin_lock_init(&chip->_spinlock); - chip->mutex = &chip->_spinlock; + mutex_init(&chip->mutex); chip++; } } @@ -143,7 +142,7 @@ static int wait_for_ready(struct map_info *map, struct flchip *chip, } /* OK Still waiting. Drop the lock, wait a while and retry. */ - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); if (sleep_time >= 1000000/HZ) { /* * Half of the normal delay still remaining @@ -158,17 +157,17 @@ static int wait_for_ready(struct map_info *map, struct flchip *chip, cond_resched(); timeo--; } - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); while (chip->state != chip_state) { /* Someone's suspended the operation: sleep */ DECLARE_WAITQUEUE(wait, current); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); } if (chip->erase_suspended || chip->write_suspended) { /* Suspend has occured while sleep: reset timeout */ @@ -229,20 +228,20 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) * it'll happily send us to sleep. In any case, when * get_chip returns success we're clear to go ahead. */ - ret = spin_trylock(contender->mutex); + ret = mutex_trylock(&contender->mutex); spin_unlock(&shared->lock); if (!ret) goto retry; - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); ret = chip_ready(map, contender, mode); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (ret == -EAGAIN) { - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); goto retry; } if (ret) { - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); return ret; } spin_lock(&shared->lock); @@ -251,10 +250,10 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) * state. Put contender and retry. */ if (chip->state == FL_SYNCING) { put_chip(map, contender); - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); goto retry; } - spin_unlock(contender->mutex); + mutex_unlock(&contender->mutex); } /* Check if we have suspended erase on this chip. @@ -264,10 +263,10 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) spin_unlock(&shared->lock); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); goto retry; } @@ -336,10 +335,10 @@ static int chip_ready(struct map_info *map, struct flchip *chip, int mode) sleep: set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); schedule(); remove_wait_queue(&chip->wq, &wait); - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); return -EAGAIN; } } @@ -355,12 +354,12 @@ static void put_chip(struct map_info *map, struct flchip *chip) if (shared->writing && shared->writing != chip) { /* give back the ownership */ struct flchip *loaner = shared->writing; - spin_lock(loaner->mutex); + mutex_lock(&loaner->mutex); spin_unlock(&shared->lock); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); put_chip(map, loaner); - spin_lock(chip->mutex); - spin_unlock(loaner->mutex); + mutex_lock(&chip->mutex); + mutex_unlock(&loaner->mutex); wake_up(&chip->wq); return; } @@ -413,10 +412,10 @@ int do_write_buffer(struct map_info *map, struct flchip *chip, wbufsize = 1 << lpddr->qinfo->BufSizeShift; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, FL_WRITING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } /* Figure out the number of words to write */ @@ -477,7 +476,7 @@ int do_write_buffer(struct map_info *map, struct flchip *chip, } out: put_chip(map, chip); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -489,10 +488,10 @@ int do_erase_oneblock(struct mtd_info *mtd, loff_t adr) struct flchip *chip = &lpddr->chips[chipnum]; int ret; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, FL_ERASING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } send_pfow_command(map, LPDDR_BLOCK_ERASE, adr, 0, NULL); @@ -504,7 +503,7 @@ int do_erase_oneblock(struct mtd_info *mtd, loff_t adr) goto out; } out: put_chip(map, chip); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -517,10 +516,10 @@ static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len, struct flchip *chip = &lpddr->chips[chipnum]; int ret = 0; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, FL_READY); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -528,7 +527,7 @@ static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len, *retlen = len; put_chip(map, chip); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -568,9 +567,9 @@ static int lpddr_point(struct mtd_info *mtd, loff_t adr, size_t len, else thislen = len; /* get the chip */ - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, FL_POINT); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); if (ret) break; @@ -610,7 +609,7 @@ static void lpddr_unpoint (struct mtd_info *mtd, loff_t adr, size_t len) else thislen = len; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); if (chip->state == FL_POINT) { chip->ref_point_counter--; if (chip->ref_point_counter == 0) @@ -620,7 +619,7 @@ static void lpddr_unpoint (struct mtd_info *mtd, loff_t adr, size_t len) "pointed region\n", map->name); put_chip(map, chip); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); len -= thislen; ofs = 0; @@ -726,10 +725,10 @@ int do_xxlock(struct mtd_info *mtd, loff_t adr, uint32_t len, int thunk) int chipnum = adr >> lpddr->chipshift; struct flchip *chip = &lpddr->chips[chipnum]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, FL_LOCKING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -749,7 +748,7 @@ int do_xxlock(struct mtd_info *mtd, loff_t adr, uint32_t len, int thunk) goto out; } out: put_chip(map, chip); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -770,10 +769,10 @@ int word_program(struct map_info *map, loff_t adr, uint32_t curval) int chipnum = adr >> lpddr->chipshift; struct flchip *chip = &lpddr->chips[chipnum]; - spin_lock(chip->mutex); + mutex_lock(&chip->mutex); ret = get_chip(map, chip, FL_WRITING); if (ret) { - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } @@ -787,7 +786,7 @@ int word_program(struct map_info *map, loff_t adr, uint32_t curval) } out: put_chip(map, chip); - spin_unlock(chip->mutex); + mutex_unlock(&chip->mutex); return ret; } diff --git a/include/linux/mtd/flashchip.h b/include/linux/mtd/flashchip.h index d0bf422ae374..f43e9b49b751 100644 --- a/include/linux/mtd/flashchip.h +++ b/include/linux/mtd/flashchip.h @@ -15,6 +15,7 @@ * has asm/spinlock.h, or 2.4, which has linux/spinlock.h */ #include +#include typedef enum { FL_READY, @@ -74,8 +75,7 @@ struct flchip { unsigned int erase_suspended:1; unsigned long in_progress_block_addr; - spinlock_t *mutex; - spinlock_t _spinlock; /* We do it like this because sometimes they'll be shared. */ + struct mutex mutex; wait_queue_head_t wq; /* Wait on here when we're waiting for the chip to be ready */ int word_write_time; -- cgit v1.2.3 From 8ae664184c45def51ff0b61d4bd6c6671db6cb4f Mon Sep 17 00:00:00 2001 From: Stefani Seibold Date: Thu, 5 Aug 2010 09:19:26 +0200 Subject: mtd: change struct flchip_shared spinlock locking into mutex This patch prevent to schedule while atomic by changing the flchip_shared spinlock into a mutex. This should be save since no atomic path will use this lock. It was suggested by Arnd Bergmann and Vasiliy Kulikov. Signed-off-by: Stefani Seibold Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/chips/cfi_cmdset_0001.c | 20 ++++++++++---------- drivers/mtd/lpddr/lpddr_cmds.c | 20 ++++++++++---------- include/linux/mtd/flashchip.h | 2 +- 3 files changed, 21 insertions(+), 21 deletions(-) (limited to 'drivers/mtd/lpddr/lpddr_cmds.c') diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index 2fadb0239ba3..97d5546f9ea4 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -720,7 +720,7 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd, chip = &newcfi->chips[0]; for (i = 0; i < cfi->numchips; i++) { shared[i].writing = shared[i].erasing = NULL; - spin_lock_init(&shared[i].lock); + mutex_init(&shared[i].lock); for (j = 0; j < numparts; j++) { *chip = cfi->chips[i]; chip->start += j << partshift; @@ -889,7 +889,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr */ struct flchip_shared *shared = chip->priv; struct flchip *contender; - spin_lock(&shared->lock); + mutex_lock(&shared->lock); contender = shared->writing; if (contender && contender != chip) { /* @@ -902,7 +902,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr * get_chip returns success we're clear to go ahead. */ ret = mutex_trylock(&contender->mutex); - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); if (!ret) goto retry; mutex_unlock(&chip->mutex); @@ -917,7 +917,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr mutex_unlock(&contender->mutex); return ret; } - spin_lock(&shared->lock); + mutex_lock(&shared->lock); /* We should not own chip if it is already * in FL_SYNCING state. Put contender and retry. */ @@ -933,7 +933,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr * on this chip. Sleep. */ if (mode == FL_ERASING && shared->erasing && shared->erasing->oldstate == FL_ERASING) { - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); mutex_unlock(&chip->mutex); @@ -947,7 +947,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr shared->writing = chip; if (mode == FL_ERASING) shared->erasing = chip; - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); } ret = chip_ready(map, chip, adr, mode); if (ret == -EAGAIN) @@ -962,7 +962,7 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad if (chip->priv) { struct flchip_shared *shared = chip->priv; - spin_lock(&shared->lock); + mutex_lock(&shared->lock); if (shared->writing == chip && chip->oldstate == FL_READY) { /* We own the ability to write, but we're done */ shared->writing = shared->erasing; @@ -970,7 +970,7 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad /* give back ownership to who we loaned it from */ struct flchip *loaner = shared->writing; mutex_lock(&loaner->mutex); - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); mutex_unlock(&chip->mutex); put_chip(map, loaner, loaner->start); mutex_lock(&chip->mutex); @@ -988,11 +988,11 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad * Don't let the switch below mess things up since * we don't have ownership to resume anything. */ - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); wake_up(&chip->wq); return; } - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); } switch(chip->oldstate) { diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c index fece5be58715..04fdfcca93f7 100644 --- a/drivers/mtd/lpddr/lpddr_cmds.c +++ b/drivers/mtd/lpddr/lpddr_cmds.c @@ -98,7 +98,7 @@ struct mtd_info *lpddr_cmdset(struct map_info *map) numchips = lpddr->numchips / lpddr->qinfo->HWPartsNum; for (i = 0; i < numchips; i++) { shared[i].writing = shared[i].erasing = NULL; - spin_lock_init(&shared[i].lock); + mutex_init(&shared[i].lock); for (j = 0; j < lpddr->qinfo->HWPartsNum; j++) { *chip = lpddr->chips[i]; chip->start += j << lpddr->chipshift; @@ -217,7 +217,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) */ struct flchip_shared *shared = chip->priv; struct flchip *contender; - spin_lock(&shared->lock); + mutex_lock(&shared->lock); contender = shared->writing; if (contender && contender != chip) { /* @@ -230,7 +230,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) * get_chip returns success we're clear to go ahead. */ ret = mutex_trylock(&contender->mutex); - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); if (!ret) goto retry; mutex_unlock(&chip->mutex); @@ -245,7 +245,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) mutex_unlock(&contender->mutex); return ret; } - spin_lock(&shared->lock); + mutex_lock(&shared->lock); /* We should not own chip if it is already in FL_SYNCING * state. Put contender and retry. */ @@ -261,7 +261,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) Must sleep in such a case. */ if (mode == FL_ERASING && shared->erasing && shared->erasing->oldstate == FL_ERASING) { - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&chip->wq, &wait); mutex_unlock(&chip->mutex); @@ -275,7 +275,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, int mode) shared->writing = chip; if (mode == FL_ERASING) shared->erasing = chip; - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); } ret = chip_ready(map, chip, mode); @@ -348,7 +348,7 @@ static void put_chip(struct map_info *map, struct flchip *chip) { if (chip->priv) { struct flchip_shared *shared = chip->priv; - spin_lock(&shared->lock); + mutex_lock(&shared->lock); if (shared->writing == chip && chip->oldstate == FL_READY) { /* We own the ability to write, but we're done */ shared->writing = shared->erasing; @@ -356,7 +356,7 @@ static void put_chip(struct map_info *map, struct flchip *chip) /* give back the ownership */ struct flchip *loaner = shared->writing; mutex_lock(&loaner->mutex); - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); mutex_unlock(&chip->mutex); put_chip(map, loaner); mutex_lock(&chip->mutex); @@ -374,11 +374,11 @@ static void put_chip(struct map_info *map, struct flchip *chip) * Don't let the switch below mess things up since * we don't have ownership to resume anything. */ - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); wake_up(&chip->wq); return; } - spin_unlock(&shared->lock); + mutex_unlock(&shared->lock); } switch (chip->oldstate) { diff --git a/include/linux/mtd/flashchip.h b/include/linux/mtd/flashchip.h index f43e9b49b751..23cc10f8e343 100644 --- a/include/linux/mtd/flashchip.h +++ b/include/linux/mtd/flashchip.h @@ -92,7 +92,7 @@ struct flchip { /* This is used to handle contention on write/erase operations between partitions of the same physical chip. */ struct flchip_shared { - spinlock_t lock; + struct mutex lock; struct flchip *writing; struct flchip *erasing; }; -- cgit v1.2.3