From 28e7d218da975f6ae1751e293aed938952c55c98 Mon Sep 17 00:00:00 2001 From: Rafał Miłecki Date: Fri, 13 Jan 2012 23:58:38 +0100 Subject: bcma: invalidate the mapped core over suspend/resume MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This clears the currently mapped core when suspending, to force re-mapping after resume. Without that we were touching default core registers believing some other core is mapped. Such a behaviour resulted in lockups on some machines. Cc: stable@vger.kernel.org Signed-off-by: Rafał Miłecki Signed-off-by: John W. Linville --- drivers/bcma/host_pci.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/bcma/host_pci.c') diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c index 443b83a2fd7..c1ca9e3ada5 100644 --- a/drivers/bcma/host_pci.c +++ b/drivers/bcma/host_pci.c @@ -237,11 +237,14 @@ static void bcma_host_pci_remove(struct pci_dev *dev) #ifdef CONFIG_PM static int bcma_host_pci_suspend(struct pci_dev *dev, pm_message_t state) { + struct bcma_bus *bus = pci_get_drvdata(dev); + /* Host specific */ pci_save_state(dev); pci_disable_device(dev); pci_set_power_state(dev, pci_choose_state(dev, state)); + bus->mapped_core = NULL; return 0; } -- cgit v1.2.3 From 5d2031f2395728c765cf2bd7c1ebb6d51c4fe076 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 13 Jan 2012 23:58:39 +0100 Subject: bcma: convert suspend/resume to pm_ops MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit .. and avoid doing the unnecessary PCI operations - the PCI layer will do them for us. Signed-off-by: Linus Torvalds Signed-off-by: Rafał Miłecki Signed-off-by: John W. Linville --- drivers/bcma/host_pci.c | 42 ++++++++++++++++-------------------------- 1 file changed, 16 insertions(+), 26 deletions(-) (limited to 'drivers/bcma/host_pci.c') diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c index c1ca9e3ada5..86dfeea77e1 100644 --- a/drivers/bcma/host_pci.c +++ b/drivers/bcma/host_pci.c @@ -235,41 +235,32 @@ static void bcma_host_pci_remove(struct pci_dev *dev) } #ifdef CONFIG_PM -static int bcma_host_pci_suspend(struct pci_dev *dev, pm_message_t state) +static int bcma_host_pci_suspend(struct device *dev) { - struct bcma_bus *bus = pci_get_drvdata(dev); - - /* Host specific */ - pci_save_state(dev); - pci_disable_device(dev); - pci_set_power_state(dev, pci_choose_state(dev, state)); + struct pci_dev *pdev = to_pci_dev(dev); + struct bcma_bus *bus = pci_get_drvdata(pdev); bus->mapped_core = NULL; + return 0; } -static int bcma_host_pci_resume(struct pci_dev *dev) +static int bcma_host_pci_resume(struct device *dev) { - struct bcma_bus *bus = pci_get_drvdata(dev); - int err; + struct pci_dev *pdev = to_pci_dev(dev); + struct bcma_bus *bus = pci_get_drvdata(pdev); - /* Host specific */ - pci_set_power_state(dev, 0); - err = pci_enable_device(dev); - if (err) - return err; - pci_restore_state(dev); + return bcma_bus_resume(bus); +} - /* Bus specific */ - err = bcma_bus_resume(bus); - if (err) - return err; +static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend, + bcma_host_pci_resume); +#define BCMA_PM_OPS (&bcma_pm_ops) - return 0; -} #else /* CONFIG_PM */ -# define bcma_host_pci_suspend NULL -# define bcma_host_pci_resume NULL + +#define BCMA_PM_OPS NULL + #endif /* CONFIG_PM */ static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = { @@ -287,8 +278,7 @@ static struct pci_driver bcma_pci_bridge_driver = { .id_table = bcma_pci_bridge_tbl, .probe = bcma_host_pci_probe, .remove = bcma_host_pci_remove, - .suspend = bcma_host_pci_suspend, - .resume = bcma_host_pci_resume, + .driver.pm = BCMA_PM_OPS, }; int __init bcma_host_pci_init(void) -- cgit v1.2.3 From 685a4ef0df23b97eea1842c2698da9a2e35fc976 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 13 Jan 2012 23:58:40 +0100 Subject: bcma: add stub for bcma_bus_suspend() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit .. and connect it up with the pci host bcma driver. Now, the next step is to connect those bcma bus-level suspend/resume functions to the actual bcma device suspend resume functions. Signed-off-by: Linus Torvalds Signed-off-by: Rafał Miłecki Signed-off-by: John W. Linville --- drivers/bcma/bcma_private.h | 1 + drivers/bcma/host_pci.c | 2 +- drivers/bcma/main.c | 5 +++++ 3 files changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/bcma/host_pci.c') diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h index fda56bde36b..0def898a1d1 100644 --- a/drivers/bcma/bcma_private.h +++ b/drivers/bcma/bcma_private.h @@ -19,6 +19,7 @@ int __init bcma_bus_early_register(struct bcma_bus *bus, struct bcma_device *core_cc, struct bcma_device *core_mips); #ifdef CONFIG_PM +int bcma_bus_suspend(struct bcma_bus *bus); int bcma_bus_resume(struct bcma_bus *bus); #endif diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c index 86dfeea77e1..f59244e3397 100644 --- a/drivers/bcma/host_pci.c +++ b/drivers/bcma/host_pci.c @@ -242,7 +242,7 @@ static int bcma_host_pci_suspend(struct device *dev) bus->mapped_core = NULL; - return 0; + return bcma_bus_suspend(bus); } static int bcma_host_pci_resume(struct device *dev) diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c index 10f92b371e5..b711d9d634a 100644 --- a/drivers/bcma/main.c +++ b/drivers/bcma/main.c @@ -241,6 +241,11 @@ int __init bcma_bus_early_register(struct bcma_bus *bus, } #ifdef CONFIG_PM +int bcma_bus_suspend(struct bcma_bus *bus) +{ + return 0; +} + int bcma_bus_resume(struct bcma_bus *bus) { struct bcma_device *core; -- cgit v1.2.3