Commit e7fb9b71 authored by John Garry's avatar John Garry Committed by Carlos Maiolino
Browse files

fs/dax: Reject IOCB_ATOMIC in dax_iomap_rw() 



The DAX write path does not support IOCB_ATOMIC, so reject it when set.

Suggested-by: default avatarDarrick J. Wong <djwong@kernel.org>
Signed-off-by: default avatarJohn Garry <john.g.garry@oracle.com>
Reviewed-by: default avatarDarrick J. Wong <djwong@kernel.org>
Signed-off-by: default avatarCarlos Maiolino <cem@kernel.org>
parent 82efde9c

fs/dax.c

+3 −0
Original line number Diff line number Diff line
@@ -1743,6 +1743,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter, 
	loff_t done = 0;

	int ret;



	if (WARN_ON_ONCE(iocb->ki_flags & IOCB_ATOMIC))

		return -EIO;



	if (!iomi.len)

		return 0;