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> --- v2: remove redundant vhost_vdpa_class reset and pr_warn, adjust location of *vhost_vdpa_class impl and class_destroy. drivers/vhost/vdpa.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index e3c4f059b21a..55e966c508c8 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -53,6 +53,7 @@ struct vhost_vdpa { static DEFINE_IDA(vhost_vdpa_ida); static dev_t vhost_vdpa_major; +static struct class *vhost_vdpa_class; static void handle_vq_kick(struct vhost_work *work) { @@ -1140,6 +1141,7 @@ 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) { @@ -1197,6 +1199,10 @@ static int __init vhost_vdpa_init(void) { int r; + vhost_vdpa_class = class_create(THIS_MODULE, "vhost-vdpa"); + if (IS_ERR(vhost_vdpa_class)) + return PTR_ERR(vhost_vdpa_class); + r = alloc_chrdev_region(&vhost_vdpa_major, 0, VHOST_VDPA_DEV_MAX, "vhost-vdpa"); if (r) @@ -1211,6 +1217,7 @@ 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); @@ -1219,6 +1226,7 @@ static void __exit vhost_vdpa_exit(void) { vdpa_unregister_driver(&vhost_vdpa_driver); unregister_chrdev_region(vhost_vdpa_major, VHOST_VDPA_DEV_MAX); + class_destroy(vhost_vdpa_class); } module_exit(vhost_vdpa_exit); -- 2.27.0
