btrfs: use raid_attr in btrfs_chunk_max_errors

The number of tolerated failures is stored in the raid_attr table, use
it.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index a3fa741c853409a5f35966e9353805b28432eb84..995a15a816f236553b372487ba147f4d46915c09 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5325,19 +5325,9 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans)
 
 static inline int btrfs_chunk_max_errors(struct map_lookup *map)
 {
-       int max_errors;
-
-       if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
-                        BTRFS_BLOCK_GROUP_RAID10 |
-                        BTRFS_BLOCK_GROUP_RAID5)) {
-               max_errors = 1;
-       } else if (map->type & BTRFS_BLOCK_GROUP_RAID6) {
-               max_errors = 2;
-       } else {
-               max_errors = 0;
-       }
+       const int index = btrfs_bg_flags_to_raid_index(map->type);
 
-       return max_errors;
+       return btrfs_raid_array[index].tolerated_failures;
 }
 
 int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset)