From: Naohiro Aota naohiro.aota@wdc.com
commit 631003e2333c12cc1b52df06a707365b7363a159 upstream.
find_next_bit and find_next_zero_bit take @size as the second parameter and @offset as the third parameter. They are specified opposite in btrfs_ensure_empty_zones(). Thanks to the later loop, it never failed to detect the empty zones. Fix them and (maybe) return the result a bit faster.
Note: the naming is a bit confusing, size has two meanings here, bitmap and our range size.
Fixes: 1cd6121f2a38 ("btrfs: zoned: implement zoned chunk allocator") CC: stable@vger.kernel.org # 5.15+ Signed-off-by: Naohiro Aota naohiro.aota@wdc.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/zoned.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1164,12 +1164,12 @@ int btrfs_ensure_empty_zones(struct btrf return -ERANGE;
/* All the zones are conventional */ - if (find_next_bit(zinfo->seq_zones, begin, end) == end) + if (find_next_bit(zinfo->seq_zones, end, begin) == end) return 0;
/* All the zones are sequential and empty */ - if (find_next_zero_bit(zinfo->seq_zones, begin, end) == end && - find_next_zero_bit(zinfo->empty_zones, begin, end) == end) + if (find_next_zero_bit(zinfo->seq_zones, end, begin) == end && + find_next_zero_bit(zinfo->empty_zones, end, begin) == end) return 0;
for (pos = start; pos < start + size; pos += zinfo->zone_size) {