1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1138d1053e9a..0cc30ecda4c1 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -287,6 +287,7 @@ static int md_make_request(struct request_queue *q, struct bio *bio)
         mddev_t *mddev = q->queuedata;
         int rv;
         int cpu;
+        unsigned int sectors;
 
         if (mddev == NULL || mddev->pers == NULL
             || !mddev->ready) {
@@ -311,12 +312,16 @@ static int md_make_request(struct request_queue *q, struct bio *bio)
         atomic_inc(&mddev->active_io);
         rcu_read_unlock();
 
+        /*
+         * save the sectors now since our bio can
+         * go away inside make_request
+         */
+        sectors = bio_sectors(bio);
         rv = mddev->pers->make_request(mddev, bio);
 
         cpu = part_stat_lock();
         part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
-        part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw],
-                      bio_sectors(bio));
+        part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], sectors);
         part_stat_unlock();
 
         if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended)