[PATCH v2 8/8] virtio_blk: quiesce/unquiesce live IO when entering PM states
From: Sagi Grimberg <sagi@grimberg.me>
Date: 2017-07-05 06:53:11
Also in:
linux-nvme
Subsystem:
block layer, the rest, virtio block and scsi drivers, virtio core · Maintainers:
Jens Axboe, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Without it its not guaranteed that no .queue_rq is inflight. Reviewed-by: Ming Lei <redacted> Acked-by: Michael S. Tsirkin <mst@redhat.com> Cc: virtio-dev@lists.oasis-open.org Cc: Jason Wang <redacted> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> --- 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
--
2.7.4