diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 82249a6..9eb66c1 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1867,6 +1867,7 @@
 			int d = r10_bio->devs[i].devnum;
 			bio = r10_bio->devs[i].bio;
 			bio->bi_end_io = NULL;
+			clear_bit(BIO_UPTODATE, &bio->bi_flags);
 			if (conf->mirrors[d].rdev == NULL ||
 			    test_bit(Faulty, &conf->mirrors[d].rdev->flags))
 				continue;
@@ -2037,6 +2038,11 @@
 	/* 'size' is now the number of chunks in the array */
 	/* calculate "used chunks per device" in 'stride' */
 	stride = size * conf->copies;
+
+	/* We need to round up when dividing by raid_disks to
+	 * get the stride size.
+	 */
+	stride += conf->raid_disks - 1;
 	sector_div(stride, conf->raid_disks);
 	mddev->size = stride  << (conf->chunk_shift-1);