+ if (bqt->alloc_policy == BLK_TAG_ALLOC_FIFO) {
+ tag = find_first_zero_bit(bqt->tag_map, max_depth);
+ if (tag >= max_depth)
+ return 1;
+ } else {
+ int start = bqt->next_tag;
+ int size = min_t(int, bqt->max_depth, max_depth + start);
+ tag = find_next_zero_bit(bqt->tag_map, size, start);
+ if (tag >= size && start + size > bqt->max_depth) {
+ size = start + size - bqt->max_depth;
+ tag = find_first_zero_bit(bqt->tag_map, size);
+ }
+ if (tag >= size)
+ return 1;
+ }