typo in subject
On Thu, Dec 23, 2021 at 03:31:45PM +0800, Yi Wang wrote:
> From: Zhang Min <[email protected]>
>
> Some applications like kata-containers need to acquire MAJOR/MINOR/DEVNAME
> for devInfo [1], so regist vhost-vdpa dev class to expose uevent.
>
> 1.
> https://github.com/kata-containers/kata-containers/blob/main/src/runtime/virtcontainers/device/config/config.go
>
> Signed-off-by: Zhang Min <[email protected]>
> Signed-off-by: Yi Wang <[email protected]>
> ---
> drivers/vhost/vdpa.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index fb41db3da611..90fbad93e7a2 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -1012,6 +1012,7 @@ static void vhost_vdpa_release_dev(struct device
> *device)
> kfree(v);
> }
>
> +static struct class *vhost_vdpa_class;
> static int vhost_vdpa_probe(struct vdpa_device *vdpa)
> {
> const struct vdpa_config_ops *ops = vdpa->config;
> @@ -1040,6 +1041,7 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
> v->dev.release = vhost_vdpa_release_dev;
> v->dev.parent = &vdpa->dev;
> v->dev.devt = MKDEV(MAJOR(vhost_vdpa_major), minor);
> + v->dev.class = vhost_vdpa_class;
> v->vqs = kmalloc_array(v->nvqs, sizeof(struct vhost_virtqueue),
> GFP_KERNEL);
> if (!v->vqs) {
> @@ -1097,6 +1099,14 @@ static int __init vhost_vdpa_init(void)
> {
> int r;
>
> + vhost_vdpa_class = class_create(THIS_MODULE, "vhost-vdpa");
> + if (IS_ERR(vhost_vdpa_class)) {
> + r = PTR_ERR(vhost_vdpa_class);
> + pr_warn("vhost vdpa class create error %d, maybe mod
> reinserted\n", r);
what's mod reinserted? why warn not error?
> + vhost_vdpa_class = NULL;
> + return r;
> + }
> +
> r = alloc_chrdev_region(&vhost_vdpa_major, 0, VHOST_VDPA_DEV_MAX,
> "vhost-vdpa");
> if (r)
> @@ -1111,6 +1121,7 @@ static int __init vhost_vdpa_init(void)
> err_vdpa_register_driver:
> unregister_chrdev_region(vhost_vdpa_major, VHOST_VDPA_DEV_MAX);
> err_alloc_chrdev:
> + class_destroy(vhost_vdpa_class);
> return r;
> }
> module_init(vhost_vdpa_init);
> @@ -1118,6 +1129,7 @@ module_init(vhost_vdpa_init);
> static void __exit vhost_vdpa_exit(void)
> {
> vdpa_unregister_driver(&vhost_vdpa_driver);
> + class_destroy(vhost_vdpa_class);
> unregister_chrdev_region(vhost_vdpa_major, VHOST_VDPA_DEV_MAX);
> }
> module_exit(vhost_vdpa_exit);
> --
> 2.27.0
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