[PATCH 21/36] drm/omap: fix error handling in omap_framebuffer_create()

[Tomi Valkeinen]

When an error happens in omap_framebuffer_create(),
omap_framebuffer_create() calls omap_framebuffer_destroy() if the fb
struct has been allocated. However, that crashes, as
omap_framebuffer_destroy(), which calls drm_framebuffer_cleanup(),
should only be called after drm_framebuffer_init()

Fix this by just calling kfree() for the allocated fb when an error
happens.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/omapdrm/omap_fb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c 
b/drivers/gpu/drm/omapdrm/omap_fb.c
index d1e5f6da30d4..3c6488e89788 100644
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -380,7 +380,7 @@ struct drm_framebuffer *omap_framebuffer_create(struct 
drm_device *dev,
 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
                struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 {
-       struct omap_framebuffer *omap_fb;
+       struct omap_framebuffer *omap_fb = NULL;
        struct drm_framebuffer *fb = NULL;
        const struct format *format = NULL;
        int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
@@ -451,8 +451,7 @@ struct drm_framebuffer *omap_framebuffer_init(struct 
drm_device *dev,
        return fb;

 fail:
-       if (fb)
-               omap_framebuffer_destroy(fb);
+       kfree(omap_fb);

        return ERR_PTR(ret);
 }
-- 
2.3.3