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dm cache metadata: Fix loading discard bitset 

Add missing dm_bitset_cursor_next() to properly advance the bitset
cursor.

Otherwise, the discarded state of all blocks is set according to the
discarded state of the first block.

Fixes: ae4a46a1f6 ("dm cache metadata: use bitset cursor api to load discard bitset")
Cc: stable@vger.kernel.org
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Nikos Tsironis 2019-04-17 17:19:18 +03:00 committed by Mike Snitzer
parent 7aedf75ff7
commit e28adc3bf3
1 changed files with 8 additions and 1 deletions
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9
drivers/md/dm-cache-metadata.c
View File

@ -1167,11 +1167,18 @@ static int __load_discards(struct dm_cache_metadata *cmd,
if (r)
return r;
for (b = 0; b < from_dblock(cmd->discard_nr_blocks); b++) {
for (b = 0; ; b++) {
r = fn(context, cmd->discard_block_size, to_dblock(b),
dm_bitset_cursor_get_value(&c));
if (r)
break;
if (b >= (from_dblock(cmd->discard_nr_blocks) - 1))
break;
r = dm_bitset_cursor_next(&c);
if (r)
break;
}
dm_bitset_cursor_end(&c);