linux-kernel - [PATCH V5 5/6] pmdomain: arm: Use FLAG_DEV_NAME

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Message-ID: <20241030125512.2884761-6-quic_sibis@quicinc.com>
Date: Wed, 30 Oct 2024 18:25:11 +0530
From: Sibi Sankar <quic_sibis@...cinc.com>
To: <sudeep.holla@....com>, <cristian.marussi@....com>, <johan@...nel.org>,
        <ulf.hansson@...aro.org>, <jassisinghbrar@...il.com>,
        <dmitry.baryshkov@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <arm-scmi@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-arm-msm@...r.kernel.org>, <quic_sibis@...cinc.com>,
        <konradybcio@...nel.org>, <linux-pm@...r.kernel.org>,
        <tstrudel@...gle.com>, <rafael@...nel.org>,
        "Johan Hovold" <johan+linaro@...nel.org>
Subject: [PATCH V5 5/6] pmdomain: arm: Use FLAG_DEV_NAME_FW to ensure unique names

The domain attributes returned by the perf protocol can end up reporting
identical names across domains, resulting in debugfs node creation failure.
Use the GENPD_FLAG_DEV_NAME_FW to ensure the genpd providers end up with an
unique name.

Logs: [X1E reports 'NCC' for all its scmi perf domains]
debugfs: Directory 'NCC' with parent 'pm_genpd' already present!
debugfs: Directory 'NCC' with parent 'pm_genpd' already present!

Reported-by: Johan Hovold <johan+linaro@...nel.org>
Closes: https://lore.kernel.org/lkml/ZoQjAWse2YxwyRJv@hovoldconsulting.com/
Suggested-by: Ulf Hansson <ulf.hansson@...aro.org>
Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
---
 drivers/pmdomain/arm/scmi_perf_domain.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pmdomain/arm/scmi_perf_domain.c b/drivers/pmdomain/arm/scmi_perf_domain.c
index d7ef46ccd9b8..3693423459c9 100644
--- a/drivers/pmdomain/arm/scmi_perf_domain.c
+++ b/drivers/pmdomain/arm/scmi_perf_domain.c
@@ -125,7 +125,8 @@ static int scmi_perf_domain_probe(struct scmi_device *sdev)
 		scmi_pd->ph = ph;
 		scmi_pd->genpd.name = scmi_pd->info->name;
 		scmi_pd->genpd.flags = GENPD_FLAG_ALWAYS_ON |
-				       GENPD_FLAG_OPP_TABLE_FW;
+				       GENPD_FLAG_OPP_TABLE_FW |
+				       GENPD_FLAG_DEV_NAME_FW;
 		scmi_pd->genpd.set_performance_state = scmi_pd_set_perf_state;
 		scmi_pd->genpd.attach_dev = scmi_pd_attach_dev;
 		scmi_pd->genpd.detach_dev = scmi_pd_detach_dev;
-- 
2.34.1