On Mon, 2018-07-30 at 20:02 +0800, Ming Lei wrote:

Runtime PM isn't ready for blk-mq yet, and commit 765e40b675a9 ("=

block:

disable runtime-pm for blk-mq") tried to disable it. Unfortunatel=

y,

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'.
=20
This patch disables runtime-pm for blk-mq really by pm_runtime�

8-disable()

and fixes all kinds of PM related kernel crash.

Reviewed-by: Bart Van Assche <redacted>