[PATCH 001 of 5] md: Avoid oops when attempting to fix read errors on raid10

[NeilBrown]

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

Signed-off-by: Neil Brown <neilb@xxxxxxx>

### Diffstat output
 ./drivers/md/raid10.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff ./drivers/md/raid10.c~current~ ./drivers/md/raid10.c
--- ./drivers/md/raid10.c~current~	2006-04-28 12:13:20.000000000 +1000
+++ ./drivers/md/raid10.c	2006-04-28 12:13:20.000000000 +1000
@@ -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,
-
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