BLK_MQ_MAX_DEPTH
BUILD_BUG_ON(BLK_MQ_MAX_DEPTH > 1 << BLK_MQ_UNIQUE_TAG_BITS);
if (set->queue_depth > BLK_MQ_MAX_DEPTH) {
BLK_MQ_MAX_DEPTH);
set->queue_depth = BLK_MQ_MAX_DEPTH;
DM_MQ_QUEUE_DEPTH, BLK_MQ_MAX_DEPTH);
set->queue_depth = min_t(unsigned, ctrl->sqsize, BLK_MQ_MAX_DEPTH - 1);