[PATCH v3 08/15] block: Error an attempt to split an atomic write bio

[John Garry]

As the name suggests, we should not be splitting these.

Signed-off-by: John Garry <john.g.garry at oracle.com>
---
 block/blk-merge.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 6306a2c82354..9d714e8f76b3 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -314,6 +314,11 @@ struct bio *bio_split_rw(struct bio *bio, const struct queue_limits *lim,
 	*segs = nsegs;
 	return NULL;
 split:
+	if (bio->bi_opf & REQ_ATOMIC) {
+		bio->bi_status = BLK_STS_IOERR;
+		bio_endio(bio);
+		return ERR_PTR(-EINVAL);
+	}
 	/*
 	 * We can't sanely support splitting for a REQ_NOWAIT bio. End it
 	 * with EAGAIN if splitting is required and return an error pointer.
-- 
2.31.1