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

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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: Wu Zongyong <wuzongyong@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/21199b62cc10b2a9f2cf90eeb63ad080645d881f.1635493219.git.wuzongyong@linux.alibaba.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Wu Zongyong 2021-10-29 17:14:46 +08:00 committed by Michael S. Tsirkin
parent 3b970a5842
commit c53e5d1b5e
1 changed files with 8 additions and 0 deletions
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8
drivers/vdpa/vdpa.c
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@ -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);