interconnect: drop unused icc_link_destroy() interface

Now that the link array is deallocated when destroying nodes and the
explicit link removal has been dropped from the exynos driver there are
no further users of and no need for the icc_link_destroy() interface.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230306075651.2449-24-johan+linaro@kernel.orgSigned-off-by: Georgi Djakov <djakov@kernel.org>

drivers/interconnect/core.c

@@ -910,52 +910,6 @@ int icc_link_create(struct icc_node *node, const int dst_id)
 }
 EXPORT_SYMBOL_GPL(icc_link_create);
 
-/**
- * icc_link_destroy() - destroy a link between two nodes
- * @src: pointer to source node
- * @dst: pointer to destination node
- *
- * Return: 0 on success, or an error code otherwise
- */
-int icc_link_destroy(struct icc_node *src, struct icc_node *dst)
-{
-	struct icc_node **new;
-	size_t slot;
-	int ret = 0;
-
-	if (IS_ERR_OR_NULL(src))
-		return -EINVAL;
-
-	if (IS_ERR_OR_NULL(dst))
-		return -EINVAL;
-
-	mutex_lock(&icc_lock);
-
-	for (slot = 0; slot < src->num_links; slot++)
-		if (src->links[slot] == dst)
-			break;
-
-	if (WARN_ON(slot == src->num_links)) {
-		ret = -ENXIO;
-		goto out;
-	}
-
-	src->links[slot] = src->links[--src->num_links];
-
-	new = krealloc(src->links, src->num_links * sizeof(*src->links),
-		       GFP_KERNEL);
-	if (new)
-		src->links = new;
-	else
-		ret = -ENOMEM;
-
-out:
-	mutex_unlock(&icc_lock);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(icc_link_destroy);
-
 /**
  * icc_node_add() - add interconnect node to interconnect provider
  * @node: pointer to the interconnect node

include/linux/interconnect-provider.h

@@ -118,7 +118,6 @@ int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
 struct icc_node *icc_node_create(int id);
 void icc_node_destroy(int id);
 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);
@@ -150,11 +149,6 @@ static inline int icc_link_create(struct icc_node *node, const int dst_id)
 	return -ENOTSUPP;
 }
 
-static inline int icc_link_destroy(struct icc_node *src, struct icc_node *dst)
-{
-	return -ENOTSUPP;
-}
-
 static inline void icc_node_add(struct icc_node *node, struct icc_provider *provider)
 {
 }