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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-05-22 13:02:17 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-05-22 14:50:11 +0200 |
| commit | c62ec4610c40bcc44f2d3d5ed1c312737279e2f3 (patch) | |
| tree | f94b9d7e5e3da53373c8c77448f15c4c582c3999 /drivers/base | |
| parent | Linux 4.17-rc6 (diff) | |
| download | linux-dev-c62ec4610c40bcc44f2d3d5ed1c312737279e2f3.tar.xz linux-dev-c62ec4610c40bcc44f2d3d5ed1c312737279e2f3.zip | |
PM / core: Fix direct_complete handling for devices with no callbacks
Commit 08810a4119aa (PM / core: Add NEVER_SKIP and SMART_PREPARE
driver flags) inadvertently prevented the power.direct_complete flag
from being set for devices without PM callbacks and with disabled
runtime PM which also prevents power.direct_complete from being set
for their parents. That led to problems including a resume crash on
HP ZBook 14u.
Restore the previous behavior by causing power.direct_complete to be
set for those devices again, but do that in a more direct way to
avoid overlooking that case in the future.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=199693
Fixes: 08810a4119aa (PM / core: Add NEVER_SKIP and SMART_PREPARE driver flags)
Reported-by: Thomas Martitz <kugel@rockbox.org>
Tested-by: Thomas Martitz <kugel@rockbox.org>
Cc: 4.15+ <stable@vger.kernel.org> # 4.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/main.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 02a497e7c785..e5e067091572 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -1923,10 +1923,8 @@ static int device_prepare(struct device *dev, pm_message_t state) dev->power.wakeup_path = false; - if (dev->power.no_pm_callbacks) { - ret = 1; /* Let device go direct_complete */ + if (dev->power.no_pm_callbacks) goto unlock; - } if (dev->pm_domain) callback = dev->pm_domain->ops.prepare; @@ -1960,7 +1958,8 @@ unlock: */ spin_lock_irq(&dev->power.lock); dev->power.direct_complete = state.event == PM_EVENT_SUSPEND && - pm_runtime_suspended(dev) && ret > 0 && + ((pm_runtime_suspended(dev) && ret > 0) || + dev->power.no_pm_callbacks) && !dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP); spin_unlock_irq(&dev->power.lock); return 0; |