md/raid5: fix bug in reshape code when chunk_size decreases.
Now that we support changing the chunksize, we calculate
"reshape_sectors" to be the max of number of sectors in old
and new chunk size.
However there is one please where we still use 'chunksize'
rather than 'reshape_sectors'.
This causes a reshape that reduces the size of chunks to freeze.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 59f2ec0..bb37fb1 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3916,7 +3916,7 @@
raid5_compute_sector(conf, stripe_addr*(new_data_disks),
1, &dd_idx, NULL);
last_sector =
- raid5_compute_sector(conf, ((stripe_addr+conf->chunk_size/512)
+ raid5_compute_sector(conf, ((stripe_addr+reshape_sectors)
*(new_data_disks) - 1),
1, &dd_idx, NULL);
if (last_sector >= mddev->dev_sectors)