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>
------------------------------------------------------
--- linux-2.6.13/net/sunrpc/rpc_pipe.c.orig	2005-08-28 19:41:01.000000000 -0400
+++ linux-2.6.13/net/sunrpc/rpc_pipe.c	2005-09-16 11:18:53.598157000 -0400
@@ -177,6 +177,8 @@ rpc_pipe_release(struct inode *inode, st
 		__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;