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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-28 01:28:07 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-28 01:28:07 +0100 |
| commit | 6e0ca95aa3c83c47d13f9f400bfaaa853d0b224b (patch) | |
| tree | dcdf4bf395ed43d287d3e0a2aff649f38d63b1cb /kernel/power | |
| parent | 400fc45273d53837390bf1a24f5930c1ad9de61e (diff) | |
| parent | 7bc9b1cffc95675a957e870d258e95d43dcbba0b (diff) | |
| download | lwn-6e0ca95aa3c83c47d13f9f400bfaaa853d0b224b.tar.gz lwn-6e0ca95aa3c83c47d13f9f400bfaaa853d0b224b.zip | |
Merge branch 'pm-sleep'
* pm-sleep:
PM / Hibernate: Use bool for boolean fields of struct snapshot_data
PM / Sleep: Detect device suspend/resume lockup and log event
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/Kconfig | 16 | ||||
| -rw-r--r-- | kernel/power/user.c | 20 |
2 files changed, 26 insertions, 10 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index d444c4e834f4..2fac9cc79b3d 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -178,6 +178,22 @@ config PM_SLEEP_DEBUG def_bool y depends on PM_DEBUG && PM_SLEEP +config DPM_WATCHDOG + bool "Device suspend/resume watchdog" + depends on PM_DEBUG && PSTORE + ---help--- + Sets up a watchdog timer to capture drivers that are + locked up attempting to suspend/resume a device. + A detected lockup causes system panic with message + captured in pstore device for inspection in subsequent + boot session. + +config DPM_WATCHDOG_TIMEOUT + int "Watchdog timeout in seconds" + range 1 120 + default 12 + depends on DPM_WATCHDOG + config PM_TRACE bool help diff --git a/kernel/power/user.c b/kernel/power/user.c index 957f06164ad1..24850270c802 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -36,9 +36,9 @@ static struct snapshot_data { struct snapshot_handle handle; int swap; int mode; - char frozen; - char ready; - char platform_support; + bool frozen; + bool ready; + bool platform_support; bool free_bitmaps; } snapshot_state; @@ -93,9 +93,9 @@ static int snapshot_open(struct inode *inode, struct file *filp) if (error) atomic_inc(&snapshot_device_available); - data->frozen = 0; - data->ready = 0; - data->platform_support = 0; + data->frozen = false; + data->ready = false; + data->platform_support = false; Unlock: unlock_system_sleep(); @@ -229,7 +229,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, if (error) thaw_processes(); else - data->frozen = 1; + data->frozen = true; break; @@ -240,7 +240,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, free_basic_memory_bitmaps(); data->free_bitmaps = false; thaw_processes(); - data->frozen = 0; + data->frozen = false; break; case SNAPSHOT_CREATE_IMAGE: @@ -270,7 +270,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, case SNAPSHOT_FREE: swsusp_free(); memset(&data->handle, 0, sizeof(struct snapshot_handle)); - data->ready = 0; + data->ready = false; /* * It is necessary to thaw kernel threads here, because * SNAPSHOT_CREATE_IMAGE may be invoked directly after @@ -334,7 +334,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, * PM_HIBERNATION_PREPARE */ error = suspend_devices_and_enter(PM_SUSPEND_MEM); - data->ready = 0; + data->ready = false; break; case SNAPSHOT_PLATFORM_SUPPORT: |