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authorChuck Lever <chuck.lever@oracle.com>2007-11-12 12:16:58 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-11-26 16:32:38 -0500
commitb9148c6b80d802dbc2a7530b29915a80432e50c7 (patch)
tree0388ff65beef42a21d1bd30a4868259f9a3573d2
parentc216fd708e1a97431925ecffd6d1896cff61df0a (diff)
NFS: Ensure we return zero if applications attempt to write zero bytes
A zero byte count direct write request should be a successful no-op, not an error. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/nfs/direct.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 88d5d1c7f98..4d726e9db29 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -890,6 +890,8 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
retval = generic_write_checks(file, &pos, &count, 0);
if (retval)
goto out;
+ if (!count)
+ goto out; /* return 0 */
retval = -EINVAL;
if ((ssize_t) count < 0)