diff options
| author | Giedrius Statkevičius <giedrius.statkevicius@gmail.com> | 2016-04-16 03:27:12 +0300 |
|---|---|---|
| committer | Darren Hart <dvhart@linux.intel.com> | 2016-04-25 20:39:58 +0300 |
| commit | 198b618ab118c7d856278a985de1ed0eff77c02f (patch) | |
| tree | 4bd46856f0ce8791ca9c8b55d929ab09a7de21ac /drivers/platform/x86 | |
| parent | 4f62568c1fcf0f7da49e7c22bdd01645aa508e80 (diff) | |
| download | linux-198b618ab118c7d856278a985de1ed0eff77c02f.tar.xz | |
asus-laptop: correct error handling in asus_read_brightness()
It is possible that acpi_evaluate_integer might fail and value would not be
set to any value so correct this defect by returning 0 in case of an
error. This is also the correct thing to return because the backlight
subsystem will print the old value of brightness in this case.
Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Diffstat (limited to 'drivers/platform/x86')
| -rw-r--r-- | drivers/platform/x86/asus-laptop.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c index f2b5d0a8adf0..a4cd78691ac9 100644 --- a/drivers/platform/x86/asus-laptop.c +++ b/drivers/platform/x86/asus-laptop.c @@ -775,8 +775,10 @@ static int asus_read_brightness(struct backlight_device *bd) rv = acpi_evaluate_integer(asus->handle, METHOD_BRIGHTNESS_GET, NULL, &value); - if (ACPI_FAILURE(rv)) + if (ACPI_FAILURE(rv)) { pr_warn("Error reading brightness\n"); + return 0; + } return value; } |