scsi: block: Don't check REQ_ATOMIC for reads

We check in submit_bio_noacct() if flag REQ_ATOMIC is set for both read and
write operations, and then validate the atomic operation if set. Flag
REQ_ATOMIC can only be set for writes, so don't bother checking for reads.

Fixes: 9da3d1e ("block: Add core atomic write support")
Signed-off-by: John Garry <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Kanchan Joshi <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: johnpgarry

block/blk-core.c

@@ -799,6 +799,7 @@ void submit_bio_noacct(struct bio *bio)
 
 	switch (bio_op(bio)) {
 	case REQ_OP_READ:
+		break;
 	case REQ_OP_WRITE:
 		if (bio->bi_opf & REQ_ATOMIC) {
 			status = blk_validate_atomic_write_op_size(q, bio);