blk-mq: ensure that we set REQ_IO_STAT so diskstats work

[linux-beck.git] / block / blk-mq.c

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 862f458d4760340935017f61f27c59feab476119..32593dba4684476b1350f49a35e146b4ecc737dc 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -171,9 +171,12 @@ bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx)
 }
 EXPORT_SYMBOL(blk_mq_can_queue);
 
-static void blk_mq_rq_ctx_init(struct blk_mq_ctx *ctx, struct request *rq,
-                              unsigned int rw_flags)
+static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
+                              struct request *rq, unsigned int rw_flags)
 {
+       if (blk_queue_io_stat(q))
+               rw_flags |= REQ_IO_STAT;
+
        rq->mq_ctx = ctx;
        rq->cmd_flags = rw_flags;
        ctx->rq_dispatched[rw_is_sync(rw_flags)]++;
@@ -197,7 +200,7 @@ static struct request *blk_mq_alloc_request_pinned(struct request_queue *q,
 
                rq = __blk_mq_alloc_request(hctx, gfp & ~__GFP_WAIT, reserved);
                if (rq) {
-                       blk_mq_rq_ctx_init(ctx, rq, rw);
+                       blk_mq_rq_ctx_init(q, ctx, rq, rw);
                        break;
                } else if (!(gfp & __GFP_WAIT))
                        break;
@@ -921,7 +924,7 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
        trace_block_getrq(q, bio, rw);
        rq = __blk_mq_alloc_request(hctx, GFP_ATOMIC, false);
        if (likely(rq))
-               blk_mq_rq_ctx_init(ctx, rq, rw);
+               blk_mq_rq_ctx_init(q, ctx, rq, rw);
        else {
                blk_mq_put_ctx(ctx);
                trace_block_sleeprq(q, bio, rw);
@@ -1377,6 +1380,7 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_reg *reg,
        q->queue_hw_ctx = hctxs;
 
        q->mq_ops = reg->ops;
+       q->queue_flags |= QUEUE_FLAG_MQ_DEFAULT;
 
        blk_queue_make_request(q, blk_mq_make_request);
        blk_queue_rq_timed_out(q, reg->ops->timeout);