[media] omap3isp: Fix division by 0

If the requested clock rate passed to the XCLK set_rate or round_rate
operation is 0, the driver will try to divide by 0. Fix this.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Laurent Pinchart 2014-09-25 09:22:00 -03:00 committed by Mauro Carvalho Chehab
parent 584ca0252a
commit aadec012ea
1 changed files with 3 additions and 0 deletions
drivers/media/platform/omap3isp

View File

@ -220,6 +220,9 @@ static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
return ISPTCTRL_CTRL_DIV_BYPASS;
}
if (*rate == 0)
*rate = 1;
divider = DIV_ROUND_CLOSEST(parent_rate, *rate);
if (divider >= ISPTCTRL_CTRL_DIV_BYPASS)
divider = ISPTCTRL_CTRL_DIV_BYPASS - 1;