Revert "md: improve partition detection in md array"

This reverts commit 5b479c91da90eef605f851508744bfe8269591a0.

Quoth Neil Brown:

  "It causes an oops when auto-detecting raid arrays, and it doesn't
   seem easy to fix.

   The array may not be 'open' when do_md_run is called, so
   bdev->bd_disk might be NULL, so bd_set_size can oops.

   This whole approach of opening an md device before it has been
   assembled just seems to get more and more painful.  I think I'm going
   to have to come up with something clever to provide both backward
   comparability with usage expectation, and sane integration into the
   rest of the kernel."

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index a72e70ad0975..061375ee6592 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3864,6 +3864,7 @@ static int raid5_resize(mddev_t *mddev, sector_t sectors)
         sectors &= ~((sector_t)mddev->chunk_size/512 - 1);
         mddev->array_size = (sectors * (mddev->raid_disks-conf->max_degraded))>>1;
         set_capacity(mddev->gendisk, mddev->array_size << 1);
+        mddev->changed = 1;
         if (sectors/2  > mddev->size && mddev->recovery_cp == MaxSector) {
                 mddev->recovery_cp = mddev->size << 1;
                 set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
@@ -3998,6 +3999,7 @@ static void end_reshape(raid5_conf_t *conf)
                 conf->mddev->array_size = conf->mddev->size *
                         (conf->raid_disks - conf->max_degraded);
                 set_capacity(conf->mddev->gendisk, conf->mddev->array_size << 1);
+                conf->mddev->changed = 1;
 
                 bdev = bdget_disk(conf->mddev->gendisk, 0);
                 if (bdev) {