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Mikulas Patocka babc250e27 udlfb: introduce a rendering mutex 
Rendering calls may be done simultaneously from the workqueue,
dlfb_ops_write, dlfb_ops_ioctl, dlfb_ops_set_par and dlfb_dpy_deferred_io.
The code is robust enough so that it won't crash on concurrent rendering.

However, concurrent rendering may cause display corruption if the same
pixel is simultaneously being rendered. In order to avoid this corruption,
this patch adds a mutex around the rendering calls.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: Bernie Thompson <bernie@plugable.com>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: <stable@vger.kernel.org>
[b.zolnierkie: replace "dlfb:" with "uldfb:" in the patch summary]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
 		2019-04-01 17:46:57 +02:00
..
atmel_lcdc.h video: atmel_lcdfb: pass the pdata as params 2013-09-27 09:26:20 +03:00
aty128.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
broadsheetfb.h broadsheetfb: support storing waveform 2010-03-12 15:52:34 -08:00
cirrus.h
…
cvisionppc.h
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da8xx-fb.h video: da8xx-fb: improve readability of code 2013-08-09 14:02:42 +03:00
display_timing.h video: display_timing: Add flags to select the edge when the sync is driven 2016-11-02 10:48:18 +02:00
edid.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gbe.h
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hecubafb.h
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ili9320.h
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imx-ipu-image-convert.h gpu: ipu-v3: Add queued image conversion support 2016-09-19 08:30:27 +02:00
imx-ipu-v3.h media updates for v5.1-rc1 2019-03-09 14:45:54 -08:00
kyro.h drivers/video/fbdev/kyrofb: Use arch_phys_wc_add() and pci_ioremap_wc_bar() 2015-08-25 09:59:44 +02:00
mach64.h
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maxinefb.h
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mbxfb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
metronomefb.h
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mipi_display.h drm: Add support for pps and compression mode command packet 2018-07-25 07:51:05 -04:00
mmp_disp.h video: mmp: add pitch info in mmp_win structure 2013-09-20 12:52:33 +03:00
neomagic.h video: fbdev: neofb: use arch_phys_wc_add() and ioremap_wc() 2015-06-03 12:41:49 +03:00
newport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
of_display_timing.h video: of: display_timing: Remove of_display_timings_exist() function 2018-03-12 17:06:54 +01:00
of_videomode.h video: add of helper for display timings/videomode 2013-01-24 09:03:48 +01:00
omap-panel-data.h omapdss: omap-panel-data.h: Remove connector_type from atv pdata 2016-06-03 16:06:32 +03:00
omapfb_dss.h media: include/video/omapfb_dss.h: use IS_ENABLED() 2018-05-05 11:45:51 -04:00
omapvrfb.h OMAPDSS: VRFB: add omap_vrfb_supported() 2012-10-17 12:17:18 +03:00
permedia2.h
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platform_lcd.h drivers/video/backlight/platform_lcd.c: introduce probe callback 2013-04-29 18:28:18 -07:00
pm3fb.h
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pmag-ba-fb.h
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pmagb-b-fb.h
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pxa168fb.h video: pxa168fb: Cleanup pxa168fb.h file 2014-01-17 10:57:43 +02:00
radeon.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
s1d13xxxfb.h s1d13xxxfb: drop unused code 2010-12-21 01:05:43 +09:00
sa1100fb.h FB: sa1100: remove global sa1100fb_.*_power function pointers 2012-02-21 11:56:19 +00:00
samsung_fimd.h drm/exynos: fimd: Make pixel blend mode configurable 2018-12-14 15:46:15 +09:00
sh_mobile_lcdc.h video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support 2018-05-14 15:47:30 +02:00
sisfb.h UAPI: (Scripted) Disintegrate include/video 2012-12-20 17:14:26 +00:00
sstfb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tdfx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tgafb.h
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trident.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udlfb.h udlfb: introduce a rendering mutex 2019-04-01 17:46:57 +02:00
uvesafb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vga.h arch, drivers: don't include <asm/io.h> directly, use <linux/io.h> instead 2015-08-10 23:07:05 -04:00
videomode.h videomode: videomode_from_timing work 2013-03-21 14:34:33 +02:00
w100fb.h
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