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ACPI: PM: Fix device wakeup power reference counting error

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[ Upstream commit 452a3e723f ]

Fix a device wakeup power reference counting error introduced by
commit a2d7b2e004 ("ACPI: PM: Fix sharing of wakeup power
resources") because of a coding mistake.

Fixes: a2d7b2e004 ("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>
This commit is contained in:
Rafael J. Wysocki 2021-11-04 22:54:17 +01:00 committed by Greg Kroah-Hartman
parent 27f2e5b914
commit f0f8307c7d
1 changed files with 4 additions and 6 deletions
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10
drivers/acpi/power.c
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@ -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--;
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;
if (--dev->wakeup.prepare_count > 0)
goto out;
err = acpi_device_sleep_wake(dev, 0, 0, 0);