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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2007-11-06 13:05:36 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-11-17 13:08:47 -0500 |
| commit | eda4f9b7996e5520934ca2a7310b363463a4e3b0 (patch) | |
| tree | 73e4e051a8c0cc0e2e7d389f64888992d33f421e /net/sunrpc/rpc_pipe.c | |
| parent | ef338bee3f4f509e82066e100f76fecbbbbc4cca (diff) | |
| download | linux-eda4f9b7996e5520934ca2a7310b363463a4e3b0.tar.gz linux-eda4f9b7996e5520934ca2a7310b363463a4e3b0.tar.bz2 linux-eda4f9b7996e5520934ca2a7310b363463a4e3b0.zip | |
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 <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/rpc_pipe.c')
| -rw-r--r-- | net/sunrpc/rpc_pipe.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; } |