RPC: stops the release_pipe() funtion from being called twice

 This patch stops the release_pipe() funtion from being called
 twice by invalidating the ops pointer in the rpc_inode
 when rpc_pipe_release() is called.

 Signed-off-by: Steve Dickson <steved@redhat.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index ded6c63f11ec..649d609e7d94 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -177,6 +177,8 @@ rpc_pipe_release(struct inode *inode, struct file *filp)
                 __rpc_purge_upcall(inode, -EPIPE);
         if (rpci->ops->release_pipe)
                 rpci->ops->release_pipe(inode);
+        if (!rpci->nreaders && !rpci->nwriters)
+                rpci->ops = NULL;
 out:
         up(&inode->i_sem);
         return 0;