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pmdomain: arm: Fix -EINVAL from scmi_pd_set_perf_state() on state 0

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Currently, scmi_pd_set_perf_state() treats a performance state of 0 as
invalid and returns -EINVAL. As a result, devices attached to SCMI
performance domains can report failures when relinquishing their
performance vote.

The OPP framework use performance state 0 to indicate that no performance
vote is required. For example, dev_pm_opp_set_rate(dev, 0) is commonly
used (by firmware or linux)  when a device is runtime suspended.

A zero performance state does not require any SCMI performance request
to be sent. Treat it as a no-op and return success instead of reporting
an error.

Signed-off-by: Praveen Talari <praveen.talari@oss.qualcomm.com>
Fixes: 2af23ceb86 ("pmdomain: arm: Add the SCMI performance domain")
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
This commit is contained in:
Praveen Talari
2026-08-05 01:27:39 +05:30
committed by Ulf Hansson
parent 818d56ac1d
commit 3314c90a2e
1 changed files with 1 additions and 1 deletions
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2
drivers/pmdomain/arm/scmi_perf_domain.c
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@@ -33,7 +33,7 @@ scmi_pd_set_perf_state(struct generic_pm_domain *genpd, unsigned int state)
return 0;
if (!state)
return -EINVAL;
return 0;
ret = pd->perf_ops->level_set(pd->ph, pd->domain_id, state, false);
if (ret)