interconnect: Add a common helper for removing all nodes

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@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index c498796adc07..1b811423020a 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -743,6 +743,28 @@ 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
  *