在 2021/10/15 下午3:14, Wu Zongyong 写道:
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@xxxxxxxxxxxxxxxxx>
---
drivers/vdpa/vdpa.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 1dc121a07a93..fd014ecec711 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -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 = 0;
As discussed in previous version, 1 seems better?
Thanks
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);
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