linux-kernel - [PATCH] pmdomain: arm: Avoid polling for scmi_perf

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Message-Id: <20231127135033.136442-1-ulf.hansson@linaro.org>
Date:   Mon, 27 Nov 2023 14:50:33 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Sudeep Holla <sudeep.holla@....com>,
        Cristian Marussi <cristian.marussi@....com>
Cc:     Nikunj Kela <nkela@...cinc.com>,
        Prasad Sodagudi <psodagud@...cinc.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Ulf Hansson <ulf.hansson@...aro.org>, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pmdomain: arm: Avoid polling for scmi_perf_domain

It was a mistake to prefer polling based mode when setting a performance
level for a domain. Let's instead rely on the protocol to decide what is
best and thus avoid polling when possible.

Reported-by: Nikunj Kela <nkela@...cinc.com>
Fixes: 2af23ceb8624 ("pmdomain: arm: Add the SCMI performance domain")
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
 drivers/pmdomain/arm/scmi_perf_domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pmdomain/arm/scmi_perf_domain.c b/drivers/pmdomain/arm/scmi_perf_domain.c
index bc3f78abb6da..709bbc448fad 100644
--- a/drivers/pmdomain/arm/scmi_perf_domain.c
+++ b/drivers/pmdomain/arm/scmi_perf_domain.c
@@ -35,7 +35,7 @@ scmi_pd_set_perf_state(struct generic_pm_domain *genpd, unsigned int state)
 	if (!state)
 		return -EINVAL;
 
-	ret = pd->perf_ops->level_set(pd->ph, pd->domain_id, state, true);
+	ret = pd->perf_ops->level_set(pd->ph, pd->domain_id, state, false);
 	if (ret)
 		dev_warn(&genpd->dev, "Failed with %d when trying to set %d perf level",
 			 ret, state);
-- 
2.34.1