Nam Cao 2db6388d8a fbdev: flush deferred IO before closing ... commit 33cd6ea9c0 upstream. When framebuffer gets closed, the queued deferred IO gets cancelled. This can cause some last display data to vanish. This is problematic for users who send a still image to the framebuffer, then close the file: the image may never appear. To ensure none of display data get lost, flush the queued deferred IO first before closing. Another possible solution is to delete the cancel_delayed_work_sync() instead. The difference is that the display may appear some time after closing. However, the clearing of page mapping after this needs to be removed too, because the page mapping is used by the deferred work. It is not completely obvious whether it is okay to not clear the page mapping. For a patch intended for stable trees, go with the simple and obvious solution. Fixes: 60b59beafb ("fbdev: mm: Deferred IO support") Cc: stable@vger.kernel.org Signed-off-by: Nam Cao <namcao@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-01-25 15:35:45 -08:00
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backlight	backlight: pwm_bl: Disable PWM on shutdown, suspend and remove	2023-11-20 11:59:20 +01:00
console	drm: fix up fbdev Kconfig defaults	2023-09-18 10:52:55 +02:00
fbdev	fbdev: flush deferred IO before closing	2024-01-25 15:35:45 -08:00
logo	video: logo: LOGO should depend on FB_CORE i.s.o. FB	2023-07-28 11:48:30 +02:00
aperture.c
cmdline.c
display_timing.c
hdmi.c
Kconfig	video: logo: LOGO should depend on FB_CORE i.s.o. FB	2023-07-28 11:48:30 +02:00
Makefile
nomodeset.c
of_display_timing.c
of_videomode.c
sticore.c	sticon/parisc: Fix STI console on 64-bit only machines	2023-06-30 17:14:14 +02:00
vgastate.c
videomode.c