xfstests/013 crashes when the test partition is mounted with -o discard:
walk_up_log_tree
btrfs_free_reserved_extent
btrfs_discard_extent
return -EOPNOTSUPP
BUG_ON ret
btrfs_discard_extent() should be fine when drive does not support the
DISCARD operation and filter the EOPNOTSUPP retcode, but currently it
does this only when some bytes were succesfully discarded.
Signed-off-by: David Sterba <dsterba@xxxxxxx>
CC: stable@xxxxxxxxxx
---
fs/btrfs/extent-tree.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 9ee6bd5..feab2ab 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1790,7 +1790,7 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
}
kfree(multi);
}
- if (discarded_bytes && ret == -EOPNOTSUPP)
+ if (ret == -EOPNOTSUPP)
ret = 0;
if (actual_bytes)
--
1.7.3.4
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