From: Tony Battersby <tonyb@cybernetics.com>
Date: Wed, 11 Jul 2018 10:46:03 -0400
Subject: [PATCH] bsg: fix bogus EINVAL on non-data commands
Git-commit: 70dbcc2254fa2a9add74a122b9dac954c4736e01
Patch-mainline: v4.18-rc5
References: bsc#1104967,FATE#325924
Fix a regression introduced in Linux kernel 4.17 where sending a SCSI
command that does not transfer data (such as TEST UNIT READY) via
/dev/bsg/* results in EINVAL.
Fixes: 17cb960f29c2 ("bsg: split handling of SCSI CDBs vs transport requeues")
Cc: <stable@vger.kernel.org> # 4.17+
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/bsg.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/block/bsg.c b/block/bsg.c
index 66602c489956..3da540faf673 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -267,8 +267,6 @@ bsg_map_hdr(struct request_queue *q, struct sg_io_v4 *hdr, fmode_t mode)
} else if (hdr->din_xfer_len) {
ret = blk_rq_map_user(q, rq, NULL, uptr64(hdr->din_xferp),
hdr->din_xfer_len, GFP_KERNEL);
- } else {
- ret = blk_rq_map_user(q, rq, NULL, NULL, 0, GFP_KERNEL);
}
if (ret)
--
2.16.4