Re: [RFC PATCH V2 16/17] block: simplify runtime PM support
From: jianchao.wang <hidden>
Date: 2018-08-15 06:39:05
Hi Ming On 08/11/2018 03:12 PM, Ming Lei wrote:
quoted hunk ↗ jump to hunk
@@ -3786,6 +3800,10 @@ int blk_pre_runtime_suspend(struct request_queue *q) q->rpm_status = RPM_SUSPENDING; } spin_unlock_irq(q->queue_lock); + + if (!ret) + blk_freeze_queue_lock(q); + return ret;
Requests seem to be able enter the request_queue while the rpm_status is RPM_SUSPENDING and miss the rpm_resume. Even though blk_freeze_queue_lock will drain them before the real suspend start, but looks like we should stop the suspend at the moment. Thanks Jianchao