Commit 44a3b36b authored by Wei Chen's avatar Wei Chen Committed by Helge Deller

fbdev: au1200fb: Fix potential divide by zero

var->pixclock can be assigned to zero by user. Without
proper check, divide by zero would occur when invoking
macro PICOS2KHZ in au1200fb_fb_check_var.

Error out if var->pixclock is zero.
Signed-off-by: default avatarWei Chen <harperchen1110@gmail.com>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 61ac4b86
......@@ -1040,6 +1040,9 @@ static int au1200fb_fb_check_var(struct fb_var_screeninfo *var,
u32 pixclock;
int screen_size, plane;
if (!var->pixclock)
return -EINVAL;
plane = fbdev->plane;
/* Make sure that the mode respect all LCD controller and
......
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