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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-01-06 23:40:00 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-01-12 05:05:50 -0500 |
| commit | 86e4e20e8a5301ff7104a4f40f35fd5bee408186 (patch) | |
| tree | 76c00623e695e1ebe65620b1c0b56c86a18609fe /drivers/acpi/scan.c | |
| parent | d0515d9fec68bace144fda57a69f4268fb875209 (diff) | |
| download | linux-86e4e20e8a5301ff7104a4f40f35fd5bee408186.tar.gz linux-86e4e20e8a5301ff7104a4f40f35fd5bee408186.tar.bz2 linux-86e4e20e8a5301ff7104a4f40f35fd5bee408186.zip | |
ACPI: Always check if _PRW is present before trying to evaluate it
Before evaluating _PRW for devices that are reported as inactive or
not present by their _STA control methods we should check if those
methods are actually present (otherwise the evaulation of _PRW will
obviously fail and a scary message will be printed unnecessarily).
Reported-by: Andreas Mohr <andi@lisas.de>
Reported-by: Maciej Rutecki <maciej.rutecki@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 64d4da0d6d52..b5e4dedb497d 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1388,7 +1388,6 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, struct acpi_bus_ops *ops = context; int type; unsigned long long sta; - struct acpi_device_wakeup wakeup; struct acpi_device *device; acpi_status status; int result; @@ -1399,7 +1398,13 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, if (!(sta & ACPI_STA_DEVICE_PRESENT) && !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { - acpi_bus_extract_wakeup_device_power_package(handle, &wakeup); + struct acpi_device_wakeup wakeup; + acpi_handle temp; + + status = acpi_get_handle(handle, "_PRW", &temp); + if (ACPI_SUCCESS(status)) + acpi_bus_extract_wakeup_device_power_package(handle, + &wakeup); return AE_CTRL_DEPTH; } |