diff options
| author | Benoit Goby <benoit@android.com> | 2011-12-13 01:23:42 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2012-01-09 10:53:54 +0800 |
| commit | 589330165df8373042a5f2b6f861e9938e886345 (patch) | |
| tree | d4af90f8d302b87887d7b65bdf399d87acdd5aca | |
| parent | 702a5e3b07f82fdbf540c4dbbfca145a7ba42bab (diff) | |
PM: Dump suspend thread stack on dpm suspend timeout
When a driver takes more than 3 seconds to suspend, dump the suspend
thread stack since BUG() might only dump the idle thread stack.
Change-Id: If854db355fdcf3b773ea20b1b5e031def6d4b114
Signed-off-by: Benoit Goby <benoit@android.com>
| -rw-r--r-- | drivers/base/power/main.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index c7fa3c6412c..4e365ce9ed0 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -54,6 +54,10 @@ static pm_message_t pm_transition; static void dpm_drv_timeout(unsigned long data); static DEFINE_TIMER(dpm_drv_wd, dpm_drv_timeout, 0, 0); +static struct { + struct device *dev; + struct task_struct *tsk; +} dpm_drv_wd_data; static int async_error; @@ -615,10 +619,15 @@ static bool is_async(struct device *dev) */ static void dpm_drv_timeout(unsigned long data) { - struct device *dev = (struct device *) data; + struct device *dev = dpm_drv_wd_data.dev; + struct task_struct *tsk = dpm_drv_wd_data.tsk; printk(KERN_EMERG "**** DPM device timeout: %s (%s)\n", dev_name(dev), (dev->driver ? dev->driver->name : "no driver")); + + printk(KERN_EMERG "dpm suspend stack:\n"); + show_stack(tsk, NULL); + BUG(); } @@ -629,7 +638,9 @@ static void dpm_drv_timeout(unsigned long data) */ static void dpm_drv_wdset(struct device *dev) { - dpm_drv_wd.data = (unsigned long) dev; + dpm_drv_wd_data.dev = dev; + dpm_drv_wd_data.tsk = get_current(); + dpm_drv_wd.data = (unsigned long) &dpm_drv_wd_data; mod_timer(&dpm_drv_wd, jiffies + (HZ * 3)); } |