video:uvesafb: Fix dereference NULL pointer code path

platform_device_alloc could failed and return NULL,
we should check this before call platform_device_put.

Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index b75db01..d428445 100644 (file)
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -1973,7 +1973,8 @@ static int uvesafb_init(void)
                        err = -ENOMEM;
 
                if (err) {
-                       platform_device_put(uvesafb_device);
+                       if (uvesafb_device)
+                               platform_device_put(uvesafb_device);
                        platform_driver_unregister(&uvesafb_driver);
                        cn_del_callback(&uvesafb_cn_id);
                        return err;