From: Arnaud Patard <arnaud.patard@rtp-net.org>
Date: Fri, 26 Jan 2007 21:53:48 +0000 (-0800)
Subject: omapfb: Add sanity check to omapfb_update_window_async
X-Git-Tag: v2.6.21-omap1~138
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=3896fcac80245f3356d30f05c33f6b18090eb184;p=linux-2.6-omap-h63xx.git

omapfb: Add sanity check to omapfb_update_window_async

This patch makes sure that the fb_info pointer given to
omapfb_update_window_async is not null.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---

diff --git a/drivers/video/omap/omapfb_main.c b/drivers/video/omap/omapfb_main.c
index b2dce7b9507..a7cf760d44d 100644
--- a/drivers/video/omap/omapfb_main.c
+++ b/drivers/video/omap/omapfb_main.c
@@ -626,10 +626,15 @@ int omapfb_update_window_async(struct fb_info *fbi,
 				void (*callback)(void *),
 				void *callback_data)
 {
-	struct omapfb_plane_struct *plane = fbi->par;
-	struct omapfb_device *fbdev = plane->fbdev;
+	struct omapfb_plane_struct *plane;
+	struct omapfb_device *fbdev;
 	struct fb_var_screeninfo *var;
 
+	if (!fbi)
+		return -EINVAL;
+
+	plane = fbi->par;
+	fbdev = plane->fbdev;
 	var = &fbi->var;
 
 	if (win->x >= var->xres || win->y >= var->yres)