From: NeilBrown <neilb@suse.com>
Patch-mainline: never - mvfs work around
References: bsc#1162063
Subject: work around mvfs bug.

If f_op->open fails, mvfs still calls fput() and so f_op->release.
This is a bug.
It should call put_filp, but that isn't exported.

Signed-off-by: NeilBrown <neilb@suse.com>
Acked-by: NeilBrown <neilb@suse.com>

---
 fs/nfs/file.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -79,6 +79,11 @@ nfs_file_open(struct inode *inode, struc
 int
 nfs_file_release(struct inode *inode, struct file *filp)
 {
+	if (!nfs_file_open_context(filp)) {
+		dprintk("NFS: buggy mvfs module called fput after failed open\n");
+		return 0;
+	}
+
 	dprintk("NFS: release(%pD2)\n", filp);
 
 	if (filp->f_mode & FMODE_WRITE)