diff options
| author | Ming Lei <[email protected]> | 2018-07-30 20:02:19 +0800 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2018-08-02 10:36:02 -0600 |
| commit | b233f127042dba991229e3882c6217c80492f6ef (patch) | |
| tree | 3cf4b40536ec5da10dbca089c30e041baa0ba021 | |
| parent | 99972f171bba19243999310154b7442198f0ab30 (diff) | |
block: really disable runtime-pm for blk-mq
Runtime PM isn't ready for blk-mq yet, and commit 765e40b675a9 ("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 <[email protected]>
Cc: Przemek Socha <[email protected]>
Cc: Alan Stern <[email protected]>
Cc: <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Tested-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
| -rw-r--r-- | block/blk-core.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 23cd1b7770e7..f9ad73d8573c 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -3770,9 +3770,11 @@ 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) + /* Don't enable runtime PM for blk-mq until it is ready */ + if (q->mq_ops) { + pm_runtime_disable(dev); return; + } q->dev = dev; q->rpm_status = RPM_ACTIVE; |