drm/radeon/kms: Fix NULL ptr dereference

radeon_atombios_fini might be call while there is not valid atombios structure allocated, thus test for a not null ptr before trying to access this structure. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
git-mirror · Dec 10, 2009 · 4a04a84 · 4a04a84
1 parent b27b637
commit 4a04a84
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
@@ -487,8 +487,10 @@ int radeon_atombios_init(struct radeon_device *rdev)
 
 void radeon_atombios_fini(struct radeon_device *rdev)
 {
-	kfree(rdev->mode_info.atom_context->scratch);
-	kfree(rdev->mode_info.atom_context);
+	if (rdev->mode_info.atom_context) {
+		kfree(rdev->mode_info.atom_context->scratch);
+		kfree(rdev->mode_info.atom_context);
+	}
 	kfree(rdev->mode_info.atom_card_info);
 }