fs/9p: Fix error handling in v9fs_get_sb

This was introduced by 7cadb63d58a932041afa3f957d5cbb6ce69dcee5

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index f9311077de6842091df9f257e3e6d91c641a0622..1d12ba0ed3db52fa55e2e6ff4aa48ade2cae1a88 100644 (file)
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -122,6 +122,10 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
        fid = v9fs_session_init(v9ses, dev_name, data);
        if (IS_ERR(fid)) {
                retval = PTR_ERR(fid);
+               /*
+                * we need to call session_close to tear down some
+                * of the data structure setup by session_init
+                */
                goto close_session;
        }
 
@@ -144,7 +148,6 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
                retval = -ENOMEM;
                goto release_sb;
        }
-
        sb->s_root = root;
 
        if (v9fs_proto_dotl(v9ses)) {
@@ -152,7 +155,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
                st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
                if (IS_ERR(st)) {
                        retval = PTR_ERR(st);
-                       goto clunk_fid;
+                       goto release_sb;
                }
 
                v9fs_stat2inode_dotl(st, root->d_inode);
@@ -162,7 +165,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
                st = p9_client_stat(fid);
                if (IS_ERR(st)) {
                        retval = PTR_ERR(st);
-                       goto clunk_fid;
+                       goto release_sb;
                }
 
                root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
@@ -174,19 +177,24 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
 
        v9fs_fid_add(root, fid);
 
-P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
+       P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
        simple_set_mnt(mnt, sb);
        return 0;
 
 clunk_fid:
        p9_client_clunk(fid);
-
 close_session:
        v9fs_session_close(v9ses);
        kfree(v9ses);
        return retval;
-
 release_sb:
+       /*
+        * we will do the session_close and root dentry release
+        * in the below call. But we need to clunk fid, because we haven't
+        * attached the fid to dentry so it won't get clunked
+        * automatically.
+        */
+       p9_client_clunk(fid);
        deactivate_locked_super(sb);
        return retval;
 }