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driver core: Add device_link_remove function

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Device_link_remove uses the same arguments than device_link_add. The Goal
is to avoid storing the link pointer.

Signed-off-by: pascal paillet <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
pascal paillet 2018-07-05 14:25:56 +00:00 • committed by Mark Brown
commit d8842211b6
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2 changed files with 31 additions and 0 deletions
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30
drivers/base/core.c
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@ -365,6 +365,36 @@ void device_link_del(struct device_link *link)
}
EXPORT_SYMBOL_GPL(device_link_del);
/**
* device_link_remove - remove a link between two devices.
* @consumer: Consumer end of the link.
* @supplier: Supplier end of the link.
*
* The caller must ensure proper synchronization of this function with runtime
* PM.
*/
void device_link_remove(void *consumer, struct device *supplier)
{
struct device_link *link;
if (WARN_ON(consumer == supplier))
return;
device_links_write_lock();
device_pm_lock();
list_for_each_entry(link, &supplier->links.consumers, s_node) {
if (link->consumer == consumer) {
kref_put(&link->kref, __device_link_del);
break;
}
}
device_pm_unlock();
device_links_write_unlock();
}
EXPORT_SYMBOL_GPL(device_link_remove);
static void device_links_missing_supplier(struct device *dev)
{
struct device_link *link;