From: Marc Zyngier <maz@kernel.org>
Date: Sun, 13 Apr 2025 10:11:42 +0000 (+0100)
Subject: cpufreq: cppc: Fix invalid return value in .get() callback
X-Git-Tag: v5.15.181~81
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46a35fe74bae0f2e09c6156d5164910d31069f55;p=thirdparty%2Fkernel%2Fstable.git

cpufreq: cppc: Fix invalid return value in .get() callback

[ Upstream commit 2b8e6b58889c672e1ae3601d9b2b070be4dc2fbc ]

Returning a negative error code in a function with an unsigned
return type is a pretty bad idea. It is probably worse when the
justification for the change is "our static analisys tool found it".

Fixes: cf7de25878a1 ("cppc_cpufreq: Fix possible null pointer dereference")
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 17cfa2b92eeec..c5a4aa0c2c9ae 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -620,7 +620,7 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpu)
 	int ret;
 
 	if (!policy)
-		return -ENODEV;
+		return 0;
 
 	cpu_data = policy->driver_data;