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Commit 765e40b6 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: disable runtime-pm for blk-mq 



The blk-mq code lacks support for looking at the rpm_status field, tracking
active requests and the RQF_PM flag.

Due to the default switch to blk-mq for scsi people start to run into
suspend / resume issue due to this fact, so make sure we disable the runtime
PM functionality until it is properly implemented.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 31c4ccc3

block/blk-core.c

+4 −0
Original line number Diff line number Diff line
@@ -3421,6 +3421,10 @@ EXPORT_SYMBOL(blk_finish_plug); 
 */

void blk_pm_runtime_init(struct request_queue *q, struct device *dev)

{

	/* not support for RQF_PM and ->rpm_status in blk-mq yet */

	if (q->mq_ops)

		return;



	q->dev = dev;

	q->rpm_status = RPM_ACTIVE;

	pm_runtime_set_autosuspend_delay(q->dev, -1);