diff options
| author | Zhang Rui <rui.zhang@intel.com> | 2009-07-29 04:53:29 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-30 09:51:07 +0300 |
| commit | e01ce79b7f6ebc5b57128ee058811aa8f9059319 (patch) | |
| tree | 733b3b5aac2bc87a60b67bfe8ba75f3006a97d48 | |
| parent | 6b7b284958d47b77d06745b36bc7f36dab769d9b (diff) | |
| download | linux-e01ce79b7f6ebc5b57128ee058811aa8f9059319.tar.xz | |
ACPI video: correct error-handling code
backlight_device_register may return an ERR_PTR
value rather than a valid pointer.
Problem found by Julia Lawall, properly fixed by Zhang Rui.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/video.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 05dff631591c..3f685db1a76d 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -999,8 +999,10 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) sprintf(name, "acpi_video%d", count++); device->backlight = backlight_device_register(name, NULL, device, &acpi_backlight_ops); - device->backlight->props.max_brightness = device->brightness->count-3; kfree(name); + if (IS_ERR(device->backlight)) + return; + device->backlight->props.max_brightness = device->brightness->count-3; result = sysfs_create_link(&device->backlight->dev.kobj, &device->dev->dev.kobj, "device"); |