From: Sagi Grimberg Date: Tue, 4 Jul 2017 07:03:03 +0000 (+0300) Subject: virtio_blk: quiesce/unquiesce live IO when entering PM states X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9b3e99058453399b506087b3ac99d67a80343333;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 --- 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