[PATCH] staging: omapdrm: fix crash when freeing bad fb

[Andy Gross]

During unload, don't cleanup the framebuffer if it is not valid.

Signed-off-by: Andy Gross <andy.gross at ti.com>
---
 drivers/staging/omapdrm/omap_fbdev.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/omapdrm/omap_fbdev.c 
b/drivers/staging/omapdrm/omap_fbdev.c
index 11acd4c..8c6ed3b 100644
--- a/drivers/staging/omapdrm/omap_fbdev.c
+++ b/drivers/staging/omapdrm/omap_fbdev.c
@@ -208,7 +208,8 @@ static int omap_fbdev_create(struct drm_fb_helper *helper,
         */
        ret = omap_gem_get_paddr(fbdev->bo, &paddr, true);
        if (ret) {
-               dev_err(dev->dev, "could not map (paddr)!\n");
+               dev_err(dev->dev,
+                       "could not map (paddr)!  Skipping framebuffer alloc\n");
                ret = -ENOMEM;
                goto fail;
        }
@@ -388,8 +389,11 @@ void omap_fbdev_free(struct drm_device *dev)

        fbi = helper->fbdev;

-       unregister_framebuffer(fbi);
-       framebuffer_release(fbi);
+       /* only cleanup framebuffer if it is present */
+       if (fbi) {
+               unregister_framebuffer(fbi);
+               framebuffer_release(fbi);
+       }

        drm_fb_helper_fini(helper);

-- 
1.7.5.4