3.7-stable review patch. If anyone has any objections, please let me know.
------------------ From: Lothar Waßmann <[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 Waßmann <[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 @@ -369,7 +369,8 @@ 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
