md/raid5: Make logic blocking check consistent with logic that blocks

The check in raid5_make_request differs very slightly from the logic
that causes it to block lower down. This likely does not cause a bug
as the check is fuzzy anyway (as reshape may move on between the first
check and the subsequent check). However, make it consistent so it can
be cleaned up in a subsequent patch.

The condition which causes the schedule is:

 !(mddev->reshape_backwards ? logical_sector < conf->reshape_progress :
   logical_sector >= conf->reshape_progress) &&
  (mddev->reshape_backwards ? logical_sector < conf->reshape_safe :
   logical_sector >= conf->reshape_safe)

The condition that causes the early bailout is made to match this.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 9950f57..6bf6f9f 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5842,7 +5842,7 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
        if ((bi->bi_opf & REQ_NOWAIT) &&
            (conf->reshape_progress != MaxSector) &&
            (mddev->reshape_backwards
-           ? (logical_sector > conf->reshape_progress && logical_sector <= conf->reshape_safe)
+           ? (logical_sector >= conf->reshape_progress && logical_sector < conf->reshape_safe)
            : (logical_sector >= conf->reshape_safe && logical_sector < conf->reshape_progress))) {
                bio_wouldblock_error(bi);
                if (rw == WRITE)