Commit c53e5d1b authored by Wu Zongyong's avatar Wu Zongyong Committed by Michael S. Tsirkin
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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.

Signed-off-by: default avatarWu Zongyong <wuzongyong@linux.alibaba.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/21199b62cc10b2a9f2cf90eeb63ad080645d881f.1635493219.git.wuzongyong@linux.alibaba.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 3b970a58

drivers/vdpa/vdpa.c

+8 −0
Original line number Diff line number Diff line
@@ -26,8 +26,16 @@ static int vdpa_dev_probe(struct device *d) 
{

	struct vdpa_device *vdev = dev_to_vdpa(d);

	struct vdpa_driver *drv = drv_to_vdpa(vdev->dev.driver);

	const struct vdpa_config_ops *ops = vdev->config;

	u32 max_num, min_num = 1;

	int ret = 0;



	max_num = ops->get_vq_num_max(vdev);

	if (ops->get_vq_num_min)

		min_num = ops->get_vq_num_min(vdev);

	if (max_num < min_num)

		return -EINVAL;



	if (drv && drv->probe)

		ret = drv->probe(vdev);