[PATCH 5.10 2/2] Revert "dm raid: fix discard limits for raid1 and raid10"

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gre...@linuxfoundation.org>

This reverts commit e0910c8e4f87bb9f767e61a778b0d9271c4dc512.

It causes problems :(

Reported-by: Dave Jones <da...@codemonkey.org.uk>
Reported-by: Mike Snitzer <snit...@redhat.com>
Cc: Zdenek Kabelac <zkabe...@redhat.com>
Cc: Mikulas Patocka <mpato...@redhat.com>
Cc: Linus Torvalds <torva...@linux-foundation.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/md/dm-raid.c |   12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3730,14 +3730,12 @@ static void raid_io_hints(struct dm_targ
        blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs));
 
        /*
-        * RAID10 personality requires bio splitting,
-        * RAID0/1/4/5/6 don't and process large discard bios properly.
+        * RAID1 and RAID10 personalities require bio splitting,
+        * RAID0/4/5/6 don't and process large discard bios properly.
         */
-       if (rs_is_raid10(rs)) {
-               limits->discard_granularity = max(chunk_size_bytes,
-                                                 limits->discard_granularity);
-               limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors,
-                                                          
limits->max_discard_sectors);
+       if (rs_is_raid1(rs) || rs_is_raid10(rs)) {
+               limits->discard_granularity = chunk_size_bytes;
+               limits->max_discard_sectors = rs->md.chunk_sectors;
        }
 }