From eda4f9b7996e5520934ca2a7310b363463a4e3b0 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Tue, 6 Nov 2007 13:05:36 -0500 Subject: [PATCH] sunrpc: rpc_pipe_poll may miss available data in some cases Pipe messages start out life on a queue on the inode, but when first read they're moved to the filp's private pointer. So it's possible for a poll here to return null even though there's a partially read message available. Signed-off-by: J. Bruce Fields Signed-off-by: Trond Myklebust --- net/sunrpc/rpc_pipe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index 18f0a8dcc095..c59f3ca2b41b 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -280,7 +280,7 @@ rpc_pipe_poll(struct file *filp, struct poll_table_struct *wait) mask = POLLOUT | POLLWRNORM; if (rpci->ops == NULL) mask |= POLLERR | POLLHUP; - if (!list_empty(&rpci->pipe)) + if (filp->private_data || !list_empty(&rpci->pipe)) mask |= POLLIN | POLLRDNORM; return mask; }