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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>
hifive-unleashed-5.1
Chuck Lever 2007-11-12 12:16:58 -05:00 committed by Trond Myklebust
parent c216fd708e
commit b9148c6b80
1 changed files with 2 additions and 0 deletions
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2
fs/nfs/direct.c
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@ -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)