dm: remove incomplete BLOCK_PC support

DM tries to copy a few fields around for BLOCK_PC requests, but given
that no dm-target ever wires up scsi_cmd_ioctl BLOCK_PC can't actually
be sent to dm.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 93f6e9f..3f12916 100644 (file)
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -270,19 +270,6 @@ static void dm_end_request(struct request *clone, int error)
        struct mapped_device *md = tio->md;
        struct request *rq = tio->orig;
 
-       if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
-               rq->errors = clone->errors;
-               rq->resid_len = clone->resid_len;
-
-               if (rq->sense)
-                       /*
-                        * We are using the sense buffer of the original
-                        * request.
-                        * So setting the length of the sense data is enough.
-                        */
-                       rq->sense_len = clone->sense_len;
-       }
-
        free_rq_clone(clone);
        rq_end_stats(md, rq);
        if (!rq->q->mq_ops)
@@ -511,9 +498,6 @@ static int setup_clone(struct request *clone, struct request *rq,
        if (r)
                return r;
 
-       clone->cmd = rq->cmd;
-       clone->cmd_len = rq->cmd_len;
-       clone->sense = rq->sense;
        clone->end_io = end_clone_request;
        clone->end_io_data = tio;