md/raid10: fix any_working flag handling in raid10_sync_request

In raid10_sync_request(), 'any_working' indicates if any IO will
be submitted. When there's only one In_sync disk with badblocks,
'any_working' might be set to 1 but no IO is submitted. Fix it by
setting 'any_working' after badblock checks.

Link: https://lore.kernel.org/linux-raid/[email protected]
Fixes: e875ece ("md/raid10 record bad blocks as needed during recovery.")
Signed-off-by: Li Nan <[email protected]>
Reviewed-by: Yu Kuai <[email protected]>
Signed-off-by: Yu Kuai <[email protected]>

Author: Li Nan

drivers/md/raid10.c

@@ -3395,7 +3395,6 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 				    !test_bit(In_sync, &rdev->flags))
 					continue;
 				/* This is where we read from */
-				any_working = 1;
 				sector = r10_bio->devs[j].addr;
 
 				if (is_badblock(rdev, sector, max_sync,
@@ -3410,6 +3409,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 						continue;
 					}
 				}
+				any_working = 1;
 				bio = r10_bio->devs[0].bio;
 				bio->bi_next = biolist;
 				biolist = bio;