The patch titled acpi: don't free non-existent backlight in acpi video module has been added to the -mm tree. Its filename is acpi-dont-free-non-existent-backlight-in-acpi-video-module.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: acpi: don't free non-existent backlight in acpi video module From: Keith Packard <keithp@xxxxxxxxxx> acpi_video_put_one_device was attempting to remove sysfs entries and unregister a backlight device without first checking that said backlight device structure had been created. Signed-off-by: Keith Packard <keithp@xxxxxxxxxx> Cc: Zhang Rui <rui.zhang@xxxxxxxxx> Cc: Len Brown <lenb@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/acpi/video.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff -puN drivers/acpi/video.c~acpi-dont-free-non-existent-backlight-in-acpi-video-module drivers/acpi/video.c --- a/drivers/acpi/video.c~acpi-dont-free-non-existent-backlight-in-acpi-video-module +++ a/drivers/acpi/video.c @@ -2004,8 +2004,11 @@ static int acpi_video_bus_put_one_device status = acpi_remove_notify_handler(device->dev->handle, ACPI_DEVICE_NOTIFY, acpi_video_device_notify); - sysfs_remove_link(&device->backlight->dev.kobj, "device"); - backlight_device_unregister(device->backlight); + if (device->backlight) { + sysfs_remove_link(&device->backlight->dev.kobj, "device"); + backlight_device_unregister(device->backlight); + device->backlight = NULL; + } if (device->cdev) { sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); _ Patches currently in -mm which might be from keithp@xxxxxxxxxx are origin.patch acpi-dont-free-non-existent-backlight-in-acpi-video-module.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html