staging: lustre: statahead: lock leaks if statahead file recreated

During statahead file may be recreated, though this is rare case,
current code will leak the lock, this patch will release lock in
this case.

Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7232
Reviewed-on: http://review.whamcloud.com/16841
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/llite/statahead.c b/drivers/staging/lustre/lustre/llite/statahead.c
index 0677513476ec1b975d674bdd1dc1b45f2307e583..b43955f097ab6873c84de8896d62d874ae82608e 100644 (file)
--- a/drivers/staging/lustre/lustre/llite/statahead.c
+++ b/drivers/staging/lustre/lustre/llite/statahead.c
@@ -1475,6 +1475,7 @@ static int revalidate_statahead_dentry(struct inode *dir,
 
                                alias = ll_splice_alias(inode, *dentryp);
                                if (IS_ERR(alias)) {
+                                       ll_intent_release(&it);
                                        rc = PTR_ERR(alias);
                                        goto out_unplug;
                                }
@@ -1493,6 +1494,7 @@ static int revalidate_statahead_dentry(struct inode *dir,
                                       *dentryp,
                                       PFID(ll_inode2fid((*dentryp)->d_inode)),
                                       PFID(ll_inode2fid(inode)));
+                               ll_intent_release(&it);
                                rc = -ESTALE;
                                goto out_unplug;
                        }