diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-10-04 11:08:12 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-10-04 19:39:31 +0200 |
| commit | 69e445ab8b66a9f30519842ef18be555d3ee9b51 (patch) | |
| tree | 115eba75d4db85e1a78a63b614bf4df9b94c815d /drivers/base/power/main.c | |
| parent | Linux 4.19-rc6 (diff) | |
| download | linux-69e445ab8b66a9f30519842ef18be555d3ee9b51.tar.xz linux-69e445ab8b66a9f30519842ef18be555d3ee9b51.zip | |
PM / core: Clear the direct_complete flag on errors
If __device_suspend() runs asynchronously (in which case the device
passed to it is in dpm_suspended_list at that point) and it returns
early on an error or pending wakeup, and the power.direct_complete
flag has been set for the device already, the subsequent
device_resume() will be confused by that and it will call
pm_runtime_enable() incorrectly, as runtime PM has not been
disabled for the device by __device_suspend().
To avoid that, clear power.direct_complete if __device_suspend()
is not going to disable runtime PM for the device before returning.
Fixes: aae4518b3124 (PM / sleep: Mechanism to avoid resuming runtime-suspended devices unnecessarily)
Reported-by: Al Cooper <alcooperx@gmail.com>
Tested-by: Al Cooper <alcooperx@gmail.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: 3.16+ <stable@vger.kernel.org> # 3.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power/main.c')
| -rw-r--r-- | drivers/base/power/main.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 3f68e2919dc5..a690fd400260 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -1713,8 +1713,10 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) dpm_wait_for_subordinate(dev, async); - if (async_error) + if (async_error) { + dev->power.direct_complete = false; goto Complete; + } /* * If a device configured to wake up the system from sleep states @@ -1726,6 +1728,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) pm_wakeup_event(dev, 0); if (pm_wakeup_pending()) { + dev->power.direct_complete = false; async_error = -EBUSY; goto Complete; } |