fs/9p: Add missing iput in v9fs_vfs_lookup

Make sure we drop inode reference in the error path

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 8f68280..a69986c 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1037,7 +1037,7 @@
 
 	result = v9fs_fid_add(dentry, fid);
 	if (result < 0)
-		goto error;
+		goto error_iput;
 
 inst_out:
 	if (v9ses->cache)
@@ -1048,6 +1048,8 @@
 	d_add(dentry, inode);
 	return NULL;
 
+error_iput:
+	iput(inode);
 error:
 	p9_client_clunk(fid);