diff options
| -rw-r--r-- | drivers/base/firmware_class.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 8ca00524d58f..5bd2100a4dcf 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -24,6 +24,7 @@ #include <linux/list.h> #include <linux/async.h> #include <linux/pm.h> +#include <linux/suspend.h> #include "base.h" #include "power/power.h" @@ -108,6 +109,8 @@ struct firmware_cache { wait_queue_head_t wait_queue; int cnt; struct delayed_work work; + + struct notifier_block pm_notify; }; struct firmware_buf { @@ -1217,6 +1220,31 @@ static void device_uncache_fw_images_delay(unsigned long delay) msecs_to_jiffies(delay)); } +#ifdef CONFIG_PM +static int fw_pm_notify(struct notifier_block *notify_block, + unsigned long mode, void *unused) +{ + switch (mode) { + case PM_HIBERNATION_PREPARE: + case PM_SUSPEND_PREPARE: + device_cache_fw_images(); + break; + + case PM_POST_SUSPEND: + case PM_POST_HIBERNATION: + case PM_POST_RESTORE: + device_uncache_fw_images_delay(10 * MSEC_PER_SEC); + break; + } + + return 0; +} +#else +static int fw_pm_notify(struct notifier_block *notify_block, + unsigned long mode, void *unused) +{} +#endif + static void __init fw_cache_init(void) { spin_lock_init(&fw_cache.lock); @@ -1229,6 +1257,9 @@ static void __init fw_cache_init(void) init_waitqueue_head(&fw_cache.wait_queue); INIT_DELAYED_WORK(&fw_cache.work, device_uncache_fw_images_work); + + fw_cache.pm_notify.notifier_call = fw_pm_notify; + register_pm_notifier(&fw_cache.pm_notify); } static int __init firmware_class_init(void) @@ -1239,6 +1270,7 @@ static int __init firmware_class_init(void) static void __exit firmware_class_exit(void) { + unregister_pm_notifier(&fw_cache.pm_notify); class_unregister(&firmware_class); } |