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mdev: Send uevents around parent device registration 

This allows udev to trigger rules when a parent device is registered
or unregistered from mdev.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alex Williamson 2019-07-11 13:26:52 -06:00
parent b46c820f8f
commit 1e4d09d221
1 changed files with 9 additions and 0 deletions
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9
drivers/vfio/mdev/mdev_core.c
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@ -143,6 +143,8 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
{
int ret;
struct mdev_parent *parent;
char *env_string = "MDEV_STATE=registered";
char *envp[] = { env_string, NULL };
/* check for mandatory ops */
if (!ops || !ops->create || !ops->remove || !ops->supported_type_groups)
@ -194,6 +196,8 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
mutex_unlock(&parent_list_lock);
dev_info(dev, "MDEV: Registered\n");
kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
return 0;
add_dev_err:
@ -217,6 +221,8 @@ EXPORT_SYMBOL(mdev_register_device);
void mdev_unregister_device(struct device *dev)
{
struct mdev_parent *parent;
char *env_string = "MDEV_STATE=unregistered";
char *envp[] = { env_string, NULL };
mutex_lock(&parent_list_lock);
parent = __find_parent_device(dev);
@ -240,6 +246,9 @@ void mdev_unregister_device(struct device *dev)
up_write(&parent->unreg_sem);
mdev_put_parent(parent);
/* We still have the caller's reference to use for the uevent */
kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
}
EXPORT_SYMBOL(mdev_unregister_device);