From 9b3e99058453399b506087b3ac99d67a80343333 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Tue, 4 Jul 2017 10:03:03 +0300 Subject: [PATCH] virtio_blk: quiesce/unquiesce live IO when entering PM states Without it its not guaranteed that no .queue_rq is inflight. Reviewed-by: Ming Lei Acked-by: Michael S. Tsirkin Cc: virtio-dev@lists.oasis-open.org Cc: Jason Wang Signed-off-by: Sagi Grimberg --- drivers/block/virtio_blk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 0297ad7c1452..4e02aa5fdac0 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -840,7 +840,7 @@ static int virtblk_freeze(struct virtio_device *vdev) /* Make sure no work handler is accessing the device. */ flush_work(&vblk->config_work); - blk_mq_stop_hw_queues(vblk->disk->queue); + blk_mq_quiesce_queue(vblk->disk->queue); vdev->config->del_vqs(vdev); return 0; @@ -857,7 +857,7 @@ static int virtblk_restore(struct virtio_device *vdev) virtio_device_ready(vdev); - blk_mq_start_stopped_hw_queues(vblk->disk->queue, true); + blk_mq_unquiesce_queue(vblk->disk->queue); return 0; } #endif -- 2.45.2