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Commit b9148c6b authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
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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: default avatarChuck Lever <cel@netapp.com>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent c216fd70

fs/nfs/direct.c

+2 −0
Original line number Diff line number Diff line
@@ -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)