This is a note to let you know that I've just added the patch titled
video: mxsfb: fix crash when unblanking the display
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
video-mxsfb-fix-crash-when-unblanking-the-display.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6c1ecba8d84841277d68140ef485335d5be28485 Mon Sep 17 00:00:00 2001
From: Lothar WaÃmann <[email protected]>
Date: Thu, 22 Nov 2012 13:49:14 +0100
Subject: video: mxsfb: fix crash when unblanking the display
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From: Lothar WaÃmann <[email protected]>
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 WaÃmann <[email protected]>
Acked-by: Juergen Beisert <[email protected]>
Tested-by: Lauri Hintsala <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/video/mxsfb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -366,7 +366,8 @@ static void mxsfb_disable_controller(str
loop--;
}
- writel(VDCTRL4_SYNC_SIGNALS_ON, host->base + LCDC_VDCTRL4 + REG_CLR);
+ reg = readl(host->base + LCDC_VDCTRL4);
+ writel(reg & ~VDCTRL4_SYNC_SIGNALS_ON, host->base + LCDC_VDCTRL4);
clk_disable_unprepare(host->clk);
Patches currently in stable-queue which might be from [email protected]
are
queue-3.4/video-mxsfb-fix-crash-when-unblanking-the-display.patch
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