From: Zhang Min <zhang.min9@xxxxxxxxxx> 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 <zhang.min9@xxxxxxxxxx> Signed-off-by: Yi Wang <wang.yi59@xxxxxxxxxx> --- 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); + 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
