From: Ondrej Zajicek <santiago@crfreenet.org>

This patch prevents null pointer dereference in arkfb and vt8623fb.

Signed-off-by: Ondrej Zajicek <santiago@crfreenet.org>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/video/arkfb.c    |    3 ++-
 drivers/video/vt8623fb.c |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff -puN drivers/video/arkfb.c~vt8623fb-arkfb-null-pointer-dereference-fix drivers/video/arkfb.c
--- a/drivers/video/arkfb.c~vt8623fb-arkfb-null-pointer-dereference-fix
+++ a/drivers/video/arkfb.c
@@ -1055,9 +1055,10 @@ err_enable_device:
 static void __devexit ark_pci_remove(struct pci_dev *dev)
 {
 	struct fb_info *info = pci_get_drvdata(dev);
-	struct arkfb_info *par = info->par;
 
 	if (info) {
+		struct arkfb_info *par = info->par;
+
 #ifdef CONFIG_MTRR
 		if (par->mtrr_reg >= 0) {
 			mtrr_del(par->mtrr_reg, 0, 0);
diff -puN drivers/video/vt8623fb.c~vt8623fb-arkfb-null-pointer-dereference-fix drivers/video/vt8623fb.c
--- a/drivers/video/vt8623fb.c~vt8623fb-arkfb-null-pointer-dereference-fix
+++ a/drivers/video/vt8623fb.c
@@ -778,9 +778,10 @@ err_enable_device:
 static void __devexit vt8623_pci_remove(struct pci_dev *dev)
 {
 	struct fb_info *info = pci_get_drvdata(dev);
-	struct vt8623fb_info *par = info->par;
 
 	if (info) {
+		struct vt8623fb_info *par = info->par;
+
 #ifdef CONFIG_MTRR
 		if (par->mtrr_reg >= 0) {
 			mtrr_del(par->mtrr_reg, 0, 0);
_