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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rafael Wysocki <rjw@rjwysocki.net>,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-pm@vger.kernel.org,
	Vincent Guittot <vincent.guittot@linaro.org>,
	ionela.voinescu@arm.com, linux-arm-msm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] cpufreq: cached_resolved_idx can not be negative
Date: Thu, 30 Jul 2020 09:38:15 +0530
Message-ID: <d48d824ab3abacb2356878780979d7ed42191eaf.1596080365.git.viresh.kumar@linaro.org> (raw)

It is not possible for cached_resolved_idx to be invalid here as the
cpufreq core always sets index to a positive value.

Change its type to unsigned int and fix qcom usage a bit.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/qcom-cpufreq-hw.c | 5 +----
 include/linux/cpufreq.h           | 2 +-
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 0a04b6f03b9a..8c0842bd6c5a 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -66,13 +66,10 @@ static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
 						unsigned int target_freq)
 {
 	void __iomem *perf_state_reg = policy->driver_data;
-	int index;
+	unsigned int index;
 	unsigned long freq;
 
 	index = policy->cached_resolved_idx;
-	if (index < 0)
-		return 0;
-
 	writel_relaxed(index, perf_state_reg);
 
 	freq = policy->freq_table[index].frequency;
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index e62b022cb07e..58687a5bf9c8 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -127,7 +127,7 @@ struct cpufreq_policy {
 
 	 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
 	unsigned int cached_target_freq;
-	int cached_resolved_idx;
+	unsigned int cached_resolved_idx;
 
 	/* Synchronization for frequency transitions */
 	bool			transition_ongoing; /* Tracks transition status */
-- 
2.14.1


             reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-30  4:08 Viresh Kumar [this message]
2020-07-30  5:59 ` Amit Kucheria
2020-07-30  6:10   ` Viresh Kumar
2020-07-30  6:32     ` Amit Kucheria
2020-07-30  6:41       ` Viresh Kumar
2020-07-30 16:25         ` Rafael J. Wysocki

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