blk-mq: Enable support for runtime power management

Now that the blk-mq core processes power management requests
(marked with RQF_PREEMPT) in other states than RPM_ACTIVE, enable
runtime power management for blk-mq.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 2 insertions, 0 deletions

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 96d501e8663c..d384ab700afd 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -33,6 +33,7 @@
 #include "blk-mq.h"
 #include "blk-mq-debugfs.h"
 #include "blk-mq-tag.h"
+#include "blk-pm.h"
 #include "blk-stat.h"
 #include "blk-mq-sched.h"
 #include "blk-rq-qos.h"
@@ -475,6 +476,7 @@ static void __blk_mq_free_request(struct request *rq)
         struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(q, ctx->cpu);
         const int sched_tag = rq->internal_tag;
 
+        blk_pm_mark_last_busy(rq);
         if (rq->tag != -1)
                 blk_mq_put_tag(hctx, hctx->tags, ctx, rq->tag);
         if (sched_tag != -1)