linux-kernel - [PATCH v3 3/3] cpufreq: speedstep-lib: Use int type to store negative error codes

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Message-Id: <20250902114545.651661-4-rongqianfeng@vivo.com>
Date: Tue,  2 Sep 2025 19:45:44 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	linux-pm@...r.kernel.org (open list:CPU FREQUENCY SCALING FRAMEWORK),
	linux-kernel@...r.kernel.org (open list)
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH v3 3/3] cpufreq: speedstep-lib: Use int type to store negative error codes

Change the return type of the speedstep_get_freqs() function from unsigned
int to int because it may return negative error codes.  For the same
reason, change the 'ret' variables to int type as well.

No effect on runtime.

Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
---
 drivers/cpufreq/speedstep-lib.c | 12 ++++++------
 drivers/cpufreq/speedstep-lib.h | 10 +++++-----
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/cpufreq/speedstep-lib.c b/drivers/cpufreq/speedstep-lib.c
index 0b66df4ed513..f8b42e981635 100644
--- a/drivers/cpufreq/speedstep-lib.c
+++ b/drivers/cpufreq/speedstep-lib.c
@@ -378,16 +378,16 @@ EXPORT_SYMBOL_GPL(speedstep_detect_processor);
  *                     DETECT SPEEDSTEP SPEEDS                       *
  *********************************************************************/
 
-unsigned int speedstep_get_freqs(enum speedstep_processor processor,
-				  unsigned int *low_speed,
-				  unsigned int *high_speed,
-				  unsigned int *transition_latency,
-				  void (*set_state) (unsigned int state))
+int speedstep_get_freqs(enum speedstep_processor processor,
+			unsigned int *low_speed,
+			unsigned int *high_speed,
+			unsigned int *transition_latency,
+			void (*set_state)(unsigned int state))
 {
 	unsigned int prev_speed;
-	unsigned int ret = 0;
 	unsigned long flags;
 	ktime_t tv1, tv2;
+	int ret = 0;
 
 	if ((!processor) || (!low_speed) || (!high_speed) || (!set_state))
 		return -EINVAL;
diff --git a/drivers/cpufreq/speedstep-lib.h b/drivers/cpufreq/speedstep-lib.h
index dc762ea786be..48329647d4c4 100644
--- a/drivers/cpufreq/speedstep-lib.h
+++ b/drivers/cpufreq/speedstep-lib.h
@@ -41,8 +41,8 @@ extern unsigned int speedstep_get_frequency(enum speedstep_processor processor);
  * SPEEDSTEP_LOW; the second argument is zero so that no
  * cpufreq_notify_transition calls are initiated.
  */
-extern unsigned int speedstep_get_freqs(enum speedstep_processor processor,
-	unsigned int *low_speed,
-	unsigned int *high_speed,
-	unsigned int *transition_latency,
-	void (*set_state) (unsigned int state));
+extern int speedstep_get_freqs(enum speedstep_processor processor,
+			       unsigned int *low_speed,
+			       unsigned int *high_speed,
+			       unsigned int *transition_latency,
+			       void (*set_state)(unsigned int state));
-- 
2.34.1