ENGR00306832 mxsfb: xres_virtual should not larger than xres

eLCDIF did not support stride buffer, check the xres_virtual
in function mxfb_check_var, return false
if the value larger than xres.

Signed-off-by: Sandor Yu <R01008@freescale.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index cc31ec702ac9..82eb82e28e91 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -392,6 +392,11 @@ static int mxsfb_check_var(struct fb_var_screeninfo *var,
         if (var->yres < MIN_YRES)
                 var->yres = MIN_YRES;
 
+        if (var->xres_virtual > var->xres) {
+                dev_dbg(fb_info->device, "stride not supported\n");
+                return -EINVAL;
+        }
+
         if (var->xres_virtual < var->xres)
                 var->xres_virtual = var->xres;
         if (var->yres_virtual < var->yres)