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authorArnd Bergmann <arnd@arndb.de>2010-07-08 10:18:46 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-08-07 18:25:00 +0200
commit8a6cfeb6deca3a8fefd639d898b0d163c0b5d368 (patch)
tree9a633ad48c3b1ada0519ee7bade0602f940037f6 /drivers/scsi
parent34484062445fe905bf02c72f87ddda21881acda3 (diff)
block: push down BKL into .locked_ioctl
As a preparation for the removal of the big kernel lock in the block layer, this removes the BKL from the common ioctl handling code, moving it into every single driver still using it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/sd.c17
-rw-r--r--drivers/scsi/sr.c18
2 files changed, 25 insertions, 10 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 1d0c4b7c3b6..633ac32b25c 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -46,6 +46,7 @@
#include <linux/blkdev.h>
#include <linux/blkpg.h>
#include <linux/delay.h>
+#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/string_helpers.h>
#include <linux/async.h>
@@ -924,6 +925,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n",
disk->disk_name, cmd));
+ lock_kernel();
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
@@ -933,7 +935,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
error = scsi_nonblockable_ioctl(sdp, cmd, p,
(mode & FMODE_NDELAY) != 0);
if (!scsi_block_when_processing_errors(sdp) || !error)
- return error;
+ goto out;
/*
* Send SCSI addressing ioctls directly to mid level, send other
@@ -943,13 +945,18 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
switch (cmd) {
case SCSI_IOCTL_GET_IDLUN:
case SCSI_IOCTL_GET_BUS_NUMBER:
- return scsi_ioctl(sdp, cmd, p);
+ error = scsi_ioctl(sdp, cmd, p);
+ break;
default:
error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
if (error != -ENOTTY)
- return error;
+ break;
+ error = scsi_ioctl(sdp, cmd, p);
+ break;
}
- return scsi_ioctl(sdp, cmd, p);
+out:
+ unlock_kernel();
+ return error;
}
static void set_media_not_present(struct scsi_disk *sdkp)
@@ -1123,7 +1130,7 @@ static const struct block_device_operations sd_fops = {
.owner = THIS_MODULE,
.open = sd_open,
.release = sd_release,
- .locked_ioctl = sd_ioctl,
+ .ioctl = sd_ioctl,
.getgeo = sd_getgeo,
#ifdef CONFIG_COMPAT
.compat_ioctl = sd_compat_ioctl,
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 0a90abc7f14..d42fa6468f4 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -44,6 +44,7 @@
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
@@ -493,6 +494,8 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
void __user *argp = (void __user *)arg;
int ret;
+ lock_kernel();
+
/*
* Send SCSI addressing ioctls directly to mid level, send other
* ioctls to cdrom/block level.
@@ -500,12 +503,13 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
switch (cmd) {
case SCSI_IOCTL_GET_IDLUN:
case SCSI_IOCTL_GET_BUS_NUMBER:
- return scsi_ioctl(sdev, cmd, argp);
+ ret = scsi_ioctl(sdev, cmd, argp);
+ goto out;
}
ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
if (ret != -ENOSYS)
- return ret;
+ goto out;
/*
* ENODEV means that we didn't recognise the ioctl, or that we
@@ -516,8 +520,12 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
ret = scsi_nonblockable_ioctl(sdev, cmd, argp,
(mode & FMODE_NDELAY) != 0);
if (ret != -ENODEV)
- return ret;
- return scsi_ioctl(sdev, cmd, argp);
+ goto out;
+ ret = scsi_ioctl(sdev, cmd, argp);
+
+out:
+ unlock_kernel();
+ return ret;
}
static int sr_block_media_changed(struct gendisk *disk)
@@ -531,7 +539,7 @@ static const struct block_device_operations sr_bdops =
.owner = THIS_MODULE,
.open = sr_block_open,
.release = sr_block_release,
- .locked_ioctl = sr_block_ioctl,
+ .ioctl = sr_block_ioctl,
.media_changed = sr_block_media_changed,
/*
* No compat_ioctl for now because sr_block_ioctl never