diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-06-03 10:38:03 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-06-09 18:27:32 +0300 |
| commit | 1be5690984588953e759af0a4c6ddac182a1806c (patch) | |
| tree | 703e6e07de09bb76f3fd0de3a84afa34ace79183 /drivers/md/dm.c | |
| parent | 846785e6a5725de4f0788e78e101961566a77d2a (diff) | |
| download | linux-1be5690984588953e759af0a4c6ddac182a1806c.tar.xz | |
dm: change ->end_io calling convention
Turn the error paramter into a pointer so that target drivers can change
the value, and make sure only DM_ENDIO_* values are returned from the
methods.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 499f8209bacf..7a7047211c64 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -845,24 +845,7 @@ static void clone_endio(struct bio *bio) struct mapped_device *md = tio->io->md; dm_endio_fn endio = tio->ti->type->end_io; - if (endio) { - r = endio(tio->ti, bio, error); - if (r < 0 || r == DM_ENDIO_REQUEUE) - /* - * error and requeue request are handled - * in dec_pending(). - */ - error = r; - else if (r == DM_ENDIO_INCOMPLETE) - /* The target will handle the io */ - return; - else if (r) { - DMWARN("unimplemented target endio return value: %d", r); - BUG(); - } - } - - if (unlikely(r == -EREMOTEIO)) { + if (unlikely(error == -EREMOTEIO)) { if (bio_op(bio) == REQ_OP_WRITE_SAME && !bdev_get_queue(bio->bi_bdev)->limits.max_write_same_sectors) disable_write_same(md); @@ -871,6 +854,23 @@ static void clone_endio(struct bio *bio) disable_write_zeroes(md); } + if (endio) { + r = endio(tio->ti, bio, &error); + switch (r) { + case DM_ENDIO_REQUEUE: + error = DM_ENDIO_REQUEUE; + /*FALLTHRU*/ + case DM_ENDIO_DONE: + break; + case DM_ENDIO_INCOMPLETE: + /* The target will handle the io */ + return; + default: + DMWARN("unimplemented target endio return value: %d", r); + BUG(); + } + } + free_tio(tio); dec_pending(io, error); } |