From: Lothar Waßmann <LW@KARO-electronics.de>
Date: Thu, 22 Nov 2012 12:49:14 +0000 (+0100)
Subject: video: mxsfb: fix crash when unblanking the display
X-Git-Tag: v3.2.37~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c69aab88b3a960f9d41a8d2c467eb61f613cbea7;p=pandora-kernel.git

video: mxsfb: fix crash when unblanking the display

commit 6c1ecba8d84841277d68140ef485335d5be28485 upstream.

The VDCTRL4 register does not provide the MXS SET/CLR/TOGGLE feature.
The write in mxsfb_disable_controller() sets the data_cnt for the LCD
DMA to 0 which obviously means the max. count for the LCD DMA and
leads to overwriting arbitrary memory when the display is unblanked.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Juergen Beisert <jbe@pengutronix.de>
Tested-by: Lauri Hintsala <lauri.hintsala@bluegiga.net>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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