[PATCH 4/5] interconnect: Add a common helper for removing all nodes
From: Georgi Djakov
Date: Thu Nov 28 2019 - 08:34:55 EST
The removal of all nodes from a provider seem to be a common functionality
for all existing users and it would make sense to factor out this into a
a common helper function.
Suggested-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Signed-off-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
---
drivers/interconnect/core.c | 22 ++++++++++++++++++++++
include/linux/interconnect-provider.h | 6 ++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 467c539310f3..0e4852feb395 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -735,6 +735,28 @@ void icc_node_del(struct icc_node *node)
}
EXPORT_SYMBOL_GPL(icc_node_del);
+/**
+ * icc_nodes_remove() - remove all previously added nodes from provider
+ * @provider: the interconnect provider we are removing nodes from
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+int icc_nodes_remove(struct icc_provider *provider)
+{
+ struct icc_node *n, *tmp;
+
+ if (WARN_ON(IS_ERR_OR_NULL(provider)))
+ return -EINVAL;
+
+ list_for_each_entry_safe_reverse(n, tmp, &provider->nodes, node_list) {
+ icc_node_del(n);
+ icc_node_destroy(n->id);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(icc_nodes_remove);
+
/**
* icc_provider_add() - add a new interconnect provider
* @provider: the interconnect provider that will be added into topology
diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h
index b16f9effa555..31440c921216 100644
--- a/include/linux/interconnect-provider.h
+++ b/include/linux/interconnect-provider.h
@@ -98,6 +98,7 @@ int icc_link_create(struct icc_node *node, const int dst_id);
int icc_link_destroy(struct icc_node *src, struct icc_node *dst);
void icc_node_add(struct icc_node *node, struct icc_provider *provider);
void icc_node_del(struct icc_node *node);
+int icc_nodes_remove(struct icc_provider *provider);
int icc_provider_add(struct icc_provider *provider);
int icc_provider_del(struct icc_provider *provider);
@@ -130,6 +131,11 @@ void icc_node_del(struct icc_node *node)
{
}
+static inline int icc_nodes_remove(struct icc_provider *provider)
+{
+ return -ENOTSUPP;
+}
+
static inline int icc_provider_add(struct icc_provider *provider)
{
return -ENOTSUPP;