From 6e3f50d30af847bebce072182bd735e90a294c6a Mon Sep 17 00:00:00 2001
From: Logan Gunthorpe <logang@deltatee.com>
Date: Thu, 16 Jun 2022 13:19:31 -0600
Subject: [PATCH] md/raid5: Make logic blocking check consistent with logic
 that blocks
Git-commit: 6e3f50d30af847bebce072182bd735e90a294c6a
Patch-mainline: v6.0-rc1
References: jsc#PED-2766

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>
Signed-off-by: Coly Li <colyli@suse.de>

---
 drivers/md/raid5.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 9950f576a34e..6bf6f9fd1322 100644
--- 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)
-- 
2.35.3