From: Yu Kuai <redacted>

There are multiple places to do the same thing, factor out a helper to
prevent redundant code, and the helper will be used in following patch
as well.

Signed-off-by: Yu Kuai <redacted>
---
 drivers/md/raid1-10.c | 17 +++++++++++++++++
 drivers/md/raid1.c    | 13 ++-----------
 drivers/md/raid10.c   | 26 ++++----------------------
 3 files changed, 23 insertions(+), 33 deletions(-)

diff --git a/drivers/md/raid1-10.c b/drivers/md/raid1-10.c
index 9bf19a3409ce..506299bd55cb 100644
--- a/drivers/md/raid1-10.c
+++ b/drivers/md/raid1-10.c

@@ -110,6 +110,23 @@ static void md_bio_reset_resync_pages(struct bio *bio, struct resync_pages *rp,
        } while (idx++ < RESYNC_PAGES && size > 0);
 }

+
+static inline void raid1_submit_write(struct bio *bio)

+{
+       struct md_rdev *rdev = (struct md_rdev *)bio->bi_bdev;
+
+       bio->bi_next = NULL;
+       bio_set_dev(bio, rdev->bdev);
+       if (test_bit(Faulty, &rdev->flags))
+               bio_io_error(bio);
+       else if (unlikely(bio_op(bio) ==  REQ_OP_DISCARD &&
+                         !bdev_max_discard_sectors(bio->bi_bdev)))
+               /* Just ignore it */
+               bio_endio(bio);
+       else
+               submit_bio_noacct(bio);
+}
+
 static inline bool raid1_add_bio_to_plug(struct mddev *mddev, struct bio *bio,
                                      blk_plug_cb_fn unplug)
 {

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index e86c5e71c604..0778e398584c 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c

@@ -799,17 +799,8 @@ static void flush_bio_list(struct r1conf *conf, struct bio *bio)

        while (bio) { /* submit pending writes */
                struct bio *next = bio->bi_next;
-               struct md_rdev *rdev = (void *)bio->bi_bdev;
-               bio->bi_next = NULL;
-               bio_set_dev(bio, rdev->bdev);
-               if (test_bit(Faulty, &rdev->flags)) {
-                       bio_io_error(bio);
-               } else if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-                                   !bdev_max_discard_sectors(bio->bi_bdev)))
-                       /* Just ignore it */
-                       bio_endio(bio);
-               else
-                       submit_bio_noacct(bio);
+
+               raid1_submit_write(bio);
                bio = next;
                cond_resched();
        }

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 18702051ebd1..6640507ecb0d 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c

@@ -909,17 +909,8 @@ static void flush_pending_writes(struct r10conf *conf)

                while (bio) { /* submit pending writes */
                        struct bio *next = bio->bi_next;
-                       struct md_rdev *rdev = (void*)bio->bi_bdev;
-                       bio->bi_next = NULL;
-                       bio_set_dev(bio, rdev->bdev);
-                       if (test_bit(Faulty, &rdev->flags)) {
-                               bio_io_error(bio);
-                       } else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-                                           !bdev_max_discard_sectors(bio->bi_bdev)))
-                               /* Just ignore it */
-                               bio_endio(bio);
-                       else
-                               submit_bio_noacct(bio);
+
+                       raid1_submit_write(bio);
                        bio = next;
                        cond_resched();
                }

@@ -1134,17 +1125,8 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)

        while (bio) { /* submit pending writes */
                struct bio *next = bio->bi_next;
-               struct md_rdev *rdev = (void*)bio->bi_bdev;
-               bio->bi_next = NULL;
-               bio_set_dev(bio, rdev->bdev);
-               if (test_bit(Faulty, &rdev->flags)) {
-                       bio_io_error(bio);
-               } else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-                                   !bdev_max_discard_sectors(bio->bi_bdev)))
-                       /* Just ignore it */
-                       bio_endio(bio);
-               else
-                       submit_bio_noacct(bio);
+
+               raid1_submit_write(bio);
                bio = next;
                cond_resched();
        }
--

2.39.2