af_iucv: Test additional sk states in iucv_sock_shutdown

Add few more sk states in iucv_sock_shutdown().

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index ee517108856e..9cfdaaddc5b2 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -937,6 +937,9 @@ static int iucv_sock_shutdown(struct socket *sock, int how)
 
         lock_sock(sk);
         switch (sk->sk_state) {
+        case IUCV_DISCONN:
+        case IUCV_CLOSING:
+        case IUCV_SEVERED:
         case IUCV_CLOSED:
                 err = -ENOTCONN;
                 goto fail;