blkpm: avoid sleep when holding queue lock

In blk_post_runtime_resume, an autosuspend request will be initiated for
the device. Since we are holding the queue lock, we can't sleep and thus
we should use the async version to initiate an autosuspend, i.e.
pm_request_suspend instead of pm_runtime_suspend, which might sleep.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-core.c b/block/blk-core.c
index 33c33bc99ddd5546e6ba30ce267cb436d0328c51..d5745b5833c9d76527809c41b4718c3df70407df 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -3164,7 +3164,7 @@ void blk_post_runtime_resume(struct request_queue *q, int err)
                q->rpm_status = RPM_ACTIVE;
                __blk_run_queue(q);
                pm_runtime_mark_last_busy(q->dev);
-               pm_runtime_autosuspend(q->dev);
+               pm_request_autosuspend(q->dev);
        } else {
                q->rpm_status = RPM_SUSPENDED;
        }