NFC: delete null dereference

The exit label performs device_unlock(&dev->dev);, which will fail when dev
is NULL, and nfc_put_device(dev);, which is not useful when dev is NULL, so
just exit the function immediately.

Problem found using scripts/coccinelle/null/deref_null.cocci

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 853172c..f040532 100644 (file)
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1109,10 +1109,8 @@ static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
        idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 
        dev = nfc_get_device(idx);
-       if (!dev) {
-               rc = -ENODEV;
-               goto exit;
-       }
+       if (!dev)
+               return -ENODEV;
 
        device_lock(&dev->dev);