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md/raid5: fix bug in reshape code when chunk_size decreases.

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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>
This commit is contained in:
NeilBrown 2009-06-09 16:32:22 +10:00
parent a8c906ca3f
commit 0e6e0271a2
1 changed files with 1 additions and 1 deletions
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2
drivers/md/raid5.c
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@ -3916,7 +3916,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
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)