[PATCH RFC] virtio_blk: WCE is assumed on under VIRTIO 1.0
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From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2014-10-23 21:43:03
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Subsystem:
block layer, the rest, virtio block and scsi drivers, virtio core · Maintainers:
Jens Axboe, Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- drivers/block/virtio_blk.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index adfba9f..1f8b111 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c@@ -478,7 +478,8 @@ static int virtblk_get_cache_mode(struct virtio_device *vdev) struct virtio_blk_config, wce, &writeback); if (err) - writeback = virtio_has_feature(vdev, VIRTIO_BLK_F_WCE); + writeback = virtio_has_feature(vdev, VIRTIO_BLK_F_WCE) || + virtio_has_feature(vdev, VIRTIO_F_VERSION_1); return writeback; }
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MST