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, 3 insertions, 5 deletions

diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index d70ec1ad10d..02589cab671 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -556,24 +556,22 @@ static inline int valid_io_request(struct zram *zram, struct bio *bio)
 /*
  * Handler function for all zram I/O requests.
  */
-static int zram_make_request(struct request_queue *queue, struct bio *bio)
+static void zram_make_request(struct request_queue *queue, struct bio *bio)
 {
         struct zram *zram = queue->queuedata;
 
         if (!valid_io_request(zram, bio)) {
                 zram_stat64_inc(zram, &zram->stats.invalid_io);
                 bio_io_error(bio);
-                return 0;
+                return;
         }
 
         if (unlikely(!zram->init_done) && zram_init_device(zram)) {
                 bio_io_error(bio);
-                return 0;
+                return;
         }
 
         __zram_make_request(zram, bio, bio_data_dir(bio));
-
-        return 0;
 }
 
 void zram_reset_device(struct zram *zram)