kernel.git/drivers/video/backlight/backlight.c, branch linux-2.6.31.y

fbdev: fix info->lock deadlock in fbcon_event_notify()

2009-04-13T22:04:28Z

fb_notifier_call_chain() is called with info->lock held, i.e. in do_fb_ioctl() => FBIOPUT_VSCREENINFO => fb_set_var() and the some notifier callbacks, like fbcon_event_notify(), try to re-acquire info->lock again. Remove the lock/unlock_fb_info() in all the framebuffer notifier callbacks' and be sure to always call fb_notifier_call_chain() with info->lock held. Reported-by: Pavel Roskin Reported-by: Eric Miao Signed-off-by: Andrea Righi Cc: Stefan Richter Cc: Krzysztof Helt Cc: Geert Uytterhoeven Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fbmem: fix fb_info->lock and mm->mmap_sem circular locking dependency

2009-04-01T15:59:29Z

Fix a circular locking dependency in the frame buffer console driver pushing down the mutex fb_info->lock. Circular locking dependecies occur calling the blocking fb_notifier_call_chain() with fb_info->lock held. Notifier callbacks can try to acquire mm->mmap_sem, while fb_mmap() acquires the locks in the reverse order mm->mmap_sem => fb_info->lock. Tested-by: Andrey Borzenkov Signed-off-by: Andrea Righi Cc: Geert Uytterhoeven Cc: Krzysztof Helt Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

backlight: Add suspend/resume support to the backlight core

2009-01-08T15:37:43Z

Add suspend/resume support to the backlight core and enable use of it by appropriate drivers. Signed-off-by: Richard Purdie

bd->props.brightness doesn't reflect the actual backlight level.

2009-01-08T14:11:30Z

Always invoke backlight_update_status when users want to change the backlight. For setups where brightness change is an expensive operation, this could be done in the driver rather than the core. http://bugzilla.kernel.org/show_bug.cgi?id=12249 Signed-off-by: Zhang Rui Signed-off-by: Richard Purdie

backlight: Catch invalid input in sysfs attributes

2009-01-08T12:37:28Z

Check input properly in backlight, echo > brightness should not turn off the backlight. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix printk warning] Signed-off-by: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Richard Purdie

video: struct device - replace bus_id with dev_name(), dev_set_name()

2009-01-06T18:44:35Z

Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman

backlight: Fix missing kernel doc entry

2008-07-23T08:50:18Z

Signed-off-by: Sebastian Siewior Signed-off-by: Richard Purdie

backlight: Avoid unecessary driver callbacks

2008-02-07T09:31:52Z

Avoid driver callbacks when the brightness hasn't changed since they're not necessary. Signed-off-by: Helge Deller Signed-off-by: Richard Purdie

backlight/leds: Make two structs static

2007-10-11T21:24:12Z

This patch makes two needlessly global structs static. Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Richard Purdie

backlight: Convert from struct class_device to struct device

2007-07-16T00:20:23Z

Convert the backlight and LCD classes from struct class_device to struct device since class_device is scheduled for removal. One nasty API break is the backlight power attribute has had to be renamed to bl_power and the LCD power attribute has had to be renamed to lcd_power since the original names clash with the core. I can't see a way around this. Signed-off-by: Richard Purdie Acked-by: Greg Kroah-Hartman