Merge tag 'md/4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:

 - raid5-ppl fix by Artur. This one is introduced in this release cycle.

 - raid5 reshape fix by Xiao. This is an old bug and will be added to
   stable.

 - bitmap fix by Guoqing.

* tag 'md/4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  raid5-ppl: use BIOSET_NEED_BVECS when creating bioset
  Raid5 should update rdev->sectors after reshape
  md/bitmap: don't read page from device with Bitmap_sync

4 files changed, 7 insertions, 6 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index f4eace5ea184..40f3cd7eab0f 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -156,7 +156,8 @@ static int read_sb_page(struct mddev *mddev, loff_t offset,
 
 	rdev_for_each(rdev, mddev) {
 		if (! test_bit(In_sync, &rdev->flags)
-		    || test_bit(Faulty, &rdev->flags))
+		    || test_bit(Faulty, &rdev->flags)
+		    || test_bit(Bitmap_sync, &rdev->flags))
 			continue;
 
 		target = offset + index * (PAGE_SIZE/512);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 991f0fe2dcc6..b50eb4ac1b82 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -134,7 +134,9 @@ enum flag_bits {
 	Faulty,			/* device is known to have a fault */
 	In_sync,		/* device is in_sync with rest of array */
 	Bitmap_sync,		/* ..actually, not quite In_sync.  Need a
-				 * bitmap-based recovery to get fully in sync
+				 * bitmap-based recovery to get fully in sync.
+				 * The bit is only meaningful before device
+				 * has been passed to pers->hot_add_disk.
 				 */
 	WriteMostly,		/* Avoid reading if at all possible */
 	AutoDetected,		/* added by auto-detect */
diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index 77cce3573aa8..44ad5baf3206 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -1150,7 +1150,7 @@ int ppl_init_log(struct r5conf *conf)
 		goto err;
 	}
 
-	ppl_conf->bs = bioset_create(conf->raid_disks, 0, 0);
+	ppl_conf->bs = bioset_create(conf->raid_disks, 0, BIOSET_NEED_BVECS);
 	if (!ppl_conf->bs) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 2ceb338b094b..aeeb8d6854e2 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -7951,12 +7951,10 @@ static void end_reshape(struct r5conf *conf)
 {
 
 	if (!test_bit(MD_RECOVERY_INTR, &conf->mddev->recovery)) {
-		struct md_rdev *rdev;
 
 		spin_lock_irq(&conf->device_lock);
 		conf->previous_raid_disks = conf->raid_disks;
-		rdev_for_each(rdev, conf->mddev)
-			rdev->data_offset = rdev->new_data_offset;
+		md_finish_reshape(conf->mddev);
 		smp_wmb();
 		conf->reshape_progress = MaxSector;
 		conf->mddev->reshape_position = MaxSector;