[PATCH 1/4] interconnect: qcom: rpm: Don't set QoS params before non-zero bw is requested

[Konrad Dybcio]

Until now, the icc-rpm driver unconditionally set QoS params, even on
empty requests. This is superfluous and the downstream counterpart does
not do it. Follow it by doing the same.

Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
 drivers/interconnect/qcom/icc-rpm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
index 43b9ce0dcb6a..06e0fee547ab 100644
--- a/drivers/interconnect/qcom/icc-rpm.c
+++ b/drivers/interconnect/qcom/icc-rpm.c
@@ -193,6 +193,12 @@ static int qcom_icc_qos_set(struct icc_node *node, u64 sum_bw)
 	struct qcom_icc_provider *qp = to_qcom_provider(node->provider);
 	struct qcom_icc_node *qn = node->data;
 
+	/* Defer setting QoS until the first non-zero bandwidth request. */
+	if (!(node->avg_bw || node->peak_bw)) {
+		dev_dbg(node->provider->dev, "NOT Setting QoS for %s\n", qn->name);
+		return 0;
+	}
+
 	dev_dbg(node->provider->dev, "Setting QoS for %s\n", qn->name);
 
 	switch (qp->type) {
-- 
2.39.0