ACPI / PM: Fix possible NULL pointer deref in acpi_pm_device_sleep_state()

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After commit fa1675b (ACPI / PM: Rework and clean up
acpi_dev_pm_get_state()) a NULL pointer dereference will take place
if NULL is passed to acpi_pm_device_sleep_state() as the second
argument.

Fix that by avoiding to use the pointer that may be NULL until
it's necessary to store a return value at the location pointed to
by it (if not NULL).

Reported-and-tested-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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This commit is contained in:

Rafael J. Wysocki 2013-06-27 14:01:02 +02:00

parent fa1675b565

commit 9b5c7a5a97

1 changed files with 8 additions and 4 deletions

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drivers/acpi/device_pm.c

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