sm501fb: unregister framebuffer only if registered

There are cases when panel and crt both are not defined and only one of
them is defined and initialized. In such cases, while removing the
device, unregister the framebuffer only if it was registered.

Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c
index 381475fa137b..577a48339bab 100644
--- a/drivers/video/fbdev/sm501fb.c
+++ b/drivers/video/fbdev/sm501fb.c
@@ -2079,8 +2079,10 @@ static int sm501fb_remove(struct platform_device *pdev)
         sm501_free_init_fb(info, HEAD_CRT);
         sm501_free_init_fb(info, HEAD_PANEL);
 
-        unregister_framebuffer(fbinfo_crt);
-        unregister_framebuffer(fbinfo_pnl);
+        if (fbinfo_crt)
+                unregister_framebuffer(fbinfo_crt);
+        if (fbinfo_pnl)
+                unregister_framebuffer(fbinfo_pnl);
 
         sm501fb_stop(info);
         kfree(info);