4.17-stable review patch. If anyone has any objections, please let me know.
------------------ From: Tony Battersby <to...@cybernetics.com> commit 70dbcc2254fa2a9add74a122b9dac954c4736e01 upstream. 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: <sta...@vger.kernel.org> # 4.17+ Reviewed-by: Christoph Hellwig <h...@lst.de> Signed-off-by: Tony Battersby <to...@cybernetics.com> Signed-off-by: Jens Axboe <ax...@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- block/bsg.c | 2 -- 1 file changed, 2 deletions(-) --- a/block/bsg.c +++ b/block/bsg.c @@ -268,8 +268,6 @@ bsg_map_hdr(struct request_queue *q, str } 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)