This simplifies the code and especially the error passing a bit and
will help with the next patch.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/md/dm-mpath.c | 42 +++++++++++++++---------------------------
1 file changed, 15 insertions(+), 27 deletions(-)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 3df056b73b66..6d5ebb76149d 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1510,24 +1510,24 @@ static int multipath_end_io(struct dm_target *ti, struct request *clone,
return r;
}
-static int do_end_io_bio(struct multipath *m, struct bio *clone,
- int error, struct dm_mpath_io *mpio)
+static int multipath_end_io_bio(struct dm_target *ti, struct bio *clone, int error)
{
+ struct multipath *m = ti->private;
+ struct dm_mpath_io *mpio = get_mpio_from_bio(clone);
+ struct pgpath *pgpath = mpio->pgpath;
unsigned long flags;
- if (!error)
- return 0; /* I/O complete */
-
- if (noretry_error(error))
- return error;
+ if (!error || noretry_error(error))
+ goto done;
- if (mpio->pgpath)
- fail_path(mpio->pgpath);
+ if (pgpath)
+ fail_path(pgpath);
if (atomic_read(&m->nr_valid_paths) == 0 &&
!test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags)) {
dm_report_EIO(m);
- return -EIO;
+ error = -EIO;
+ goto done;
}
/* Queue for the daemon to resubmit */
@@ -1539,28 +1539,16 @@ static int do_end_io_bio(struct multipath *m, struct bio *clone,
if (!test_bit(MPATHF_QUEUE_IO, &m->flags))
queue_work(kmultipathd, &m->process_queued_bios);
- return DM_ENDIO_INCOMPLETE;
-}
-
-static int multipath_end_io_bio(struct dm_target *ti, struct bio *clone, int error)
-{
- struct multipath *m = ti->private;
- struct dm_mpath_io *mpio = get_mpio_from_bio(clone);
- struct pgpath *pgpath;
- struct path_selector *ps;
- int r;
-
- BUG_ON(!mpio);
-
- r = do_end_io_bio(m, clone, error, mpio);
- pgpath = mpio->pgpath;
+ error = DM_ENDIO_INCOMPLETE;
+done:
if (pgpath) {
- ps = &pgpath->pg->ps;
+ struct path_selector *ps = &pgpath->pg->ps;
+
if (ps->type->end_io)
ps->type->end_io(ps, &pgpath->path, mpio->nr_bytes);
}
- return r;
+ return error;
}
/*
--
2.11.0
--
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