vdpa: min vq num of vdpa device cannot be greater than max vq num

Just failed to probe the vdpa device if the min virtqueue num returned by get_vq_num_min is greater than the max virtqueue num returned by get_vq_num_max.

Wu Zongyong committed 5 years ago

Commit c53e5d11 parent 3b970a51 file · +8 −0Browse files

Unified · Split

drivers/vdpa/vdpa.c+8−0

@@ -26,8 +26,16 @@ static int vdpa_dev_probe(struct device *d) · 25 unmodified lines
26	26	{
27	27	struct vdpa_device *vdev = dev_to_vdpa(d);
28	28	struct vdpa_driver *drv = drv_to_vdpa(vdev->dev.driver);
	29	+ const struct vdpa_config_ops *ops = vdev->config;
	30	+ u32 max_num, min_num = 1;
29	31	int ret = 0;
30	32
	33	+ max_num = ops->get_vq_num_max(vdev);
	34	+ if (ops->get_vq_num_min)
	35	+ min_num = ops->get_vq_num_min(vdev);
	36	+ if (max_num < min_num)
	37	+ return -EINVAL;
	38	+
31	39	if (drv && drv->probe)
32	40	ret = drv->probe(vdev);
33	41