diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 32bf3ba07a9d..8f5a2d5323a6 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -1267,6 +1267,13 @@ static int virtblk_read_limits(struct virtio_blk *vblk, /* Prevent integer overflows and honor max vq size */ sg_elems = min_t(u32, sg_elems, VIRTIO_BLK_MAX_SG_ELEMS - 2); + if (!virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC)) { + u32 ring_size = virtqueue_get_vring_size(vblk->vqs[0].vq); + + if (ring_size > 2) + sg_elems = min(sg_elems, ring_size - 2); + } + /* We can handle whatever the host told us to handle. */ lim->max_segments = sg_elems;