2 files changed, 5 insertions, 1 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1e634a68541e..f363135144f6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2998,6 +2998,9 @@ rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len)
                 } else if (!sectors)
                         sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) -
                                 rdev->data_offset;
+                if (!my_mddev->pers->resize)
+                        /* Cannot change size for RAID0 or Linear etc */
+                        return -EINVAL;
         }
         if (sectors < my_mddev->dev_sectors)
                 return -EINVAL; /* component must fit device */
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 24b359717a7e..15c8d3505450 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -411,7 +411,8 @@ static sector_t raid0_size(struct mddev *mddev, sector_t sectors, int raid_disks
                   "%s does not support generic reshape\n", __func__);
 
         rdev_for_each(rdev, mddev)
-                array_sectors += rdev->sectors;
+                array_sectors += (rdev->sectors &
+                                  ~(sector_t)(mddev->chunk_sectors-1));
 
         return array_sectors;
 }