block: really disable runtime-pm for blk-mq
Runtime PM isn't ready for blk-mq yet, and commit 765e40b675
("block:
disable runtime-pm for blk-mq") tried to disable it. Unfortunately,
it can't take effect in that way since user space still can switch
it on via 'echo auto > /sys/block/sdN/device/power/control'.
This patch disables runtime-pm for blk-mq really by pm_runtime_disable()
and fixes all kinds of PM related kernel crash.
Cc: Tomas Janousek <tomi@nomi.cz>
Cc: Przemek Socha <soprwa@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: <stable@vger.kernel.org>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
99972f171b
commit
b233f12704
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@ -3770,9 +3770,11 @@ EXPORT_SYMBOL(blk_finish_plug);
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*/
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void blk_pm_runtime_init(struct request_queue *q, struct device *dev)
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{
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/* not support for RQF_PM and ->rpm_status in blk-mq yet */
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if (q->mq_ops)
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/* Don't enable runtime PM for blk-mq until it is ready */
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if (q->mq_ops) {
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pm_runtime_disable(dev);
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return;
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}
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q->dev = dev;
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q->rpm_status = RPM_ACTIVE;
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