block: remove support for bio remapping from ->make_request

There is very little benefit in allowing to let a ->make_request
instance update the bios device and sector and loop around it in
__generic_make_request when we can archive the same through calling
generic_make_request from the driver and letting the loop in
generic_make_request handle it.

Note that various drivers got the return value from ->make_request and
returned non-zero values for errors.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 3535c23af288..407cb5691425 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -106,7 +106,7 @@ static void multipath_end_request(struct bio *bio, int error)
         rdev_dec_pending(rdev, conf->mddev);
 }
 
-static int multipath_make_request(mddev_t *mddev, struct bio * bio)
+static void multipath_make_request(mddev_t *mddev, struct bio * bio)
 {
         multipath_conf_t *conf = mddev->private;
         struct multipath_bh * mp_bh;
@@ -114,7 +114,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
 
         if (unlikely(bio->bi_rw & REQ_FLUSH)) {
                 md_flush_request(mddev, bio);
-                return 0;
+                return;
         }
 
         mp_bh = mempool_alloc(conf->pool, GFP_NOIO);
@@ -126,7 +126,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
         if (mp_bh->path < 0) {
                 bio_endio(bio, -EIO);
                 mempool_free(mp_bh, conf->pool);
-                return 0;
+                return;
         }
         multipath = conf->multipaths + mp_bh->path;
 
@@ -137,7 +137,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
         mp_bh->bio.bi_end_io = multipath_end_request;
         mp_bh->bio.bi_private = mp_bh;
         generic_make_request(&mp_bh->bio);
-        return 0;
+        return;
 }
 
 static void multipath_status (struct seq_file *seq, mddev_t *mddev)