NET: cassini, fix lock imbalance

Stanse found that one error path in cas_open omits to unlock pm_mutex.
Fix that.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index 05916aafa4f1..f857afe8e488 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -4342,11 +4342,11 @@ static int cas_open(struct net_device *dev)
                 cas_unlock_all_restore(cp, flags);
         }
 
+        err = -ENOMEM;
         if (cas_tx_tiny_alloc(cp) < 0)
-                return -ENOMEM;
+                goto err_unlock;
 
         /* alloc rx descriptors */
-        err = -ENOMEM;
         if (cas_alloc_rxds(cp) < 0)
                 goto err_tx_tiny;
 
@@ -4386,6 +4386,7 @@ err_spare:
         cas_free_rxds(cp);
 err_tx_tiny:
         cas_tx_tiny_free(cp);
+err_unlock:
         mutex_unlock(&cp->pm_mutex);
         return err;
 }