Commit 2e5b2d7c authored Dec 20, 2018 by Christoph Hellwig Committed by Jens Axboe Dec 21, 2018

bsg: deprecate BIDI support in bsg

Besides the OSD command set that never got traction, the only SCSI
command using bidirectional buffers is XDWRITEREAD in the 10 and 32 byte
variants, which is extremely esoteric and has been removed from the spec
again as of SBC4r15. It probably doesn't make sense to keep the support
code around just for that, so start deprecating the support.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 6b450535

block/bsg.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -177,6 +177,10 @@ bsg_map_hdr(struct request_queue q, struct sg_io_v4 hdr, fmode_t mode)
		goto out;
		}

		pr_warn_once(
		"BIDI support in bsg has been deprecated and might be removed. "
		"Please report your use case to linux-scsi@vger.kernel.org\n");

		next_rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
		if (IS_ERR(next_rq)) {
		ret = PTR_ERR(next_rq);

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