[PATCH 1/1] Don't set discard sectors for request queue

[Xiao Ni <xni@redhat.com>]

It should use disk_stack_limits to get a proper max_discard_sectors
rather than setting a value by stack drivers.

And there is a bug. If all member disks are rotational devices,
raid0/raid10 set max_discard_sectors. So the member devices are
not ssd/nvme, but raid0/raid10 export the wrong value. It reports
warning messages in function __blkdev_issue_discard when mkfs.xfs

Signed-off-by: Xiao Ni <xni@redhat.com>
Reported-by: Yi Zhang <yi.zhang@redhat.com>
---
 drivers/md/raid0.c  | 1 -
 drivers/md/raid10.c | 2 --
 2 files changed, 3 deletions(-)

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index aced0ad8cdab..9d4831ca802c 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -398,7 +398,6 @@ static int raid0_run(struct mddev *mddev)
 
 		blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);
 		blk_queue_max_write_zeroes_sectors(mddev->queue, mddev->chunk_sectors);
-		blk_queue_max_discard_sectors(mddev->queue, UINT_MAX);
 
 		blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
 		blk_queue_io_opt(mddev->queue,
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 3aa8b6e11d58..9a6503f5cb98 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4145,8 +4145,6 @@ static int raid10_run(struct mddev *mddev)
 	conf->thread = NULL;
 
 	if (mddev->queue) {
-		blk_queue_max_discard_sectors(mddev->queue,
-					      UINT_MAX);
 		blk_queue_max_write_zeroes_sectors(mddev->queue, 0);
 		blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
 		raid10_set_io_opt(conf);
-- 
2.32.0 (Apple Git-132)