diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-11-05 00:54:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:17:09 +0300 |
| commit | f0f8307c7db314b8f3a52eaae3cecc4a43838dc2 (patch) | |
| tree | 9c51a8e89f5766dad1a4a10b3ef55fb9c4e82e30 /drivers/acpi | |
| parent | 27f2e5b91452bf4f453a8ba2de0badeafc8b353a (diff) | |
| download | linux-f0f8307c7db314b8f3a52eaae3cecc4a43838dc2.tar.xz | |
ACPI: PM: Fix device wakeup power reference counting error
[ Upstream commit 452a3e723f75880757acf87b053935c43aa89f89 ]
Fix a device wakeup power reference counting error introduced by
commit a2d7b2e004af ("ACPI: PM: Fix sharing of wakeup power
resources") because of a coding mistake.
Fixes: a2d7b2e004af ("ACPI: PM: Fix sharing of wakeup power resources")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/power.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index 4b42debeed45..c95eedd58f5b 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -755,13 +755,11 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev) mutex_lock(&acpi_device_lock); - if (dev->wakeup.prepare_count > 1) { - dev->wakeup.prepare_count--; + /* Do nothing if wakeup power has not been enabled for this device. */ + if (dev->wakeup.prepare_count <= 0) goto out; - } - /* Do nothing if wakeup power has not been enabled for this device. */ - if (!dev->wakeup.prepare_count) + if (--dev->wakeup.prepare_count > 0) goto out; err = acpi_device_sleep_wake(dev, 0, 0, 0); |