interconnect: fix mem leak when freeing nodes

commit a5904f415e1af72fa8fe6665aa4f554dc2099a95 upstream.

The node link array is allocated when adding links to a node but is not
deallocated when nodes are destroyed.

Fixes: 11f1ceca70 ("interconnect: Add generic on-chip interconnect API")
Cc: [email protected]      # 5.1
Reviewed-by: Konrad Dybcio <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Tested-by: Luca Ceresoli <[email protected]> # i.MX8MP MSC SM2-MB-EP1 Board
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Georgi Djakov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/interconnect/core.c

@@ -612,6 +612,10 @@ void icc_node_destroy(int id)
 
 	mutex_unlock(&icc_lock);
 
+	if (!node)
+		return;
+
+	kfree(node->links);
 	kfree(node);
 }
 EXPORT_SYMBOL_GPL(icc_node_destroy);