tree ef4d51e21e1bfb71bf024e4cbe629fcde96daafb
parent 4ae280b4ee3463fa57bbe6eede26b97daff8a0f1
author Mike Snitzer <snitzer@redhat.com> 1547838637 -0500
committer Mike Snitzer <snitzer@redhat.com> 1550597100 -0500

dm: update dm_process_bio() to split bio if in ->make_request_fn()

Must call blk_queue_split() otherwise queue_limits for abnormal requests
(e.g. discard, writesame, etc) won't be imposed.

In addition, add dm_queue_split() to simplify DM specific splitting that
is needed for targets that impose ti->max_io_len.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>