[PATCH] md: Avoid oops when attempting to fix read errors on raid10

We should add to the counter for the rdev *after* checking if the rdev is
NULL!!!

Signed-off-by: Neil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 617012bc107a..ddc1dfc4d3d2 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1435,9 +1435,9 @@ static void raid10d(mddev_t *mddev)
                                                 sl--;
                                                 d = r10_bio->devs[sl].devnum;
                                                 rdev = conf->mirrors[d].rdev;
-                                                atomic_add(s, &rdev->corrected_errors);
                                                 if (rdev &&
                                                     test_bit(In_sync, &rdev->flags)) {
+                                                        atomic_add(s, &rdev->corrected_errors);
                                                         if (sync_page_io(rdev->bdev,
                                                                          r10_bio->devs[sl].addr +
                                                                          sect + rdev->data_offset,