interconnect: Do not skip aggregation for disabled paths

When an interconnect path is being disabled, currently we don't aggregate
the requests for it afterwards. But the re-aggregation step shouldn't be
skipped, as it may leave the nodes with outdated bandwidth data. This
outdated data may actually keep the path still enabled and prevent the
device from going into lower power states.

Reported-by: Atul Dhudase <[email protected]>
Fixes: 7d374b2 ("interconnect: Add helpers for enabling/disabling a path")
Reviewed-by: Sibi Sankar <[email protected]>
Tested-by: Atul Dhudase <[email protected]>
Reviewed-by: Atul Dhudase <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Georgi Djakov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Georgi Djakov

drivers/interconnect/core.c

@@ -243,6 +243,7 @@ static int aggregate_requests(struct icc_node *node)
 {
 	struct icc_provider *p = node->provider;
 	struct icc_req *r;
+	u32 avg_bw, peak_bw;
 
 	node->avg_bw = 0;
 	node->peak_bw = 0;
@@ -251,9 +252,14 @@ static int aggregate_requests(struct icc_node *node)
 		p->pre_aggregate(node);
 
 	hlist_for_each_entry(r, &node->req_list, req_node) {
-		if (!r->enabled)
-			continue;
-		p->aggregate(node, r->tag, r->avg_bw, r->peak_bw,
+		if (r->enabled) {
+			avg_bw = r->avg_bw;
+			peak_bw = r->peak_bw;
+		} else {
+			avg_bw = 0;
+			peak_bw = 0;
+		}
+		p->aggregate(node, r->tag, avg_bw, peak_bw,
 			     &node->avg_bw, &node->peak_bw);
 	}