Commit 3c6a0548 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Greg Kroah-Hartman

block: disable runtime-pm for blk-mq

commit 765e40b6 upstream.

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>
Cc: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1b5a7455
...@@ -3307,6 +3307,10 @@ EXPORT_SYMBOL(blk_finish_plug); ...@@ -3307,6 +3307,10 @@ EXPORT_SYMBOL(blk_finish_plug);
*/ */
void blk_pm_runtime_init(struct request_queue *q, struct device *dev) 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->dev = dev;
q->rpm_status = RPM_ACTIVE; q->rpm_status = RPM_ACTIVE;
pm_runtime_set_autosuspend_delay(q->dev, -1); pm_runtime_set_autosuspend_delay(q->dev, -1);
......
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