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>
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 6cd2c31..c6ee491 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -264,14 +264,14 @@
return 0;
}
-static int linear_make_request (mddev_t *mddev, struct bio *bio)
+static void linear_make_request (mddev_t *mddev, struct bio *bio)
{
dev_info_t *tmp_dev;
sector_t start_sector;
if (unlikely(bio->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bio);
- return 0;
+ return;
}
rcu_read_lock();
@@ -293,7 +293,7 @@
(unsigned long long)start_sector);
rcu_read_unlock();
bio_io_error(bio);
- return 0;
+ return;
}
if (unlikely(bio->bi_sector + (bio->bi_size >> 9) >
tmp_dev->end_sector)) {
@@ -307,20 +307,17 @@
bp = bio_split(bio, end_sector - bio->bi_sector);
- if (linear_make_request(mddev, &bp->bio1))
- generic_make_request(&bp->bio1);
- if (linear_make_request(mddev, &bp->bio2))
- generic_make_request(&bp->bio2);
+ linear_make_request(mddev, &bp->bio1);
+ linear_make_request(mddev, &bp->bio2);
bio_pair_release(bp);
- return 0;
+ return;
}
bio->bi_bdev = tmp_dev->rdev->bdev;
bio->bi_sector = bio->bi_sector - start_sector
+ tmp_dev->rdev->data_offset;
rcu_read_unlock();
-
- return 1;
+ generic_make_request(bio);
}
static void linear_status (struct seq_file *seq, mddev_t *mddev)