[patch] drm/gma500: double free in psbfb_create()

[Dan Carpenter]

The psb_gtt_free_range() frees "backing" so calling it twice is a double
free bug.  I have fixed this by removing the first call.

Fixes: 4d8d096e9ae8  ('gma500: introduce the framebuffer support code')
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/gma500/framebuffer.c 
b/drivers/gpu/drm/gma500/framebuffer.c
index 2d42ce6..89d5646 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -479,9 +479,7 @@ static int psbfb_create(struct psb_fbdev *fbdev,
        mutex_unlock(&dev->struct_mutex);
        return 0;
 out_unref:
-       if (backing->stolen)
-               psb_gtt_free_range(dev, backing);
-       else
+       if (!backing->stolen)
                drm_gem_object_unreference(&backing->gem);
 out_err1:
        mutex_unlock(&dev->struct_mutex);