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Message-id: <1451474324-15481-1-git-send-email-a.hajda@samsung.com>
Date: Wed, 30 Dec 2015 12:18:42 +0100
From: Andrzej Hajda <a.hajda@...sung.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Viresh Kumar <viresh.kumar@...aro.org>
Cc: Andrzej Hajda <a.hajda@...sung.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
linux-pm@...r.kernel.org (open list:CPU FREQUENCY DRIVERS),
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] cpufreq-dt: fix handling regulator_get_voltage result
The function can return negative values so it should be assigned
to signed type.
The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].
[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576
Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
drivers/cpufreq/cpufreq-dt.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 1ceece9..9bc37c4 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -50,7 +50,8 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
struct private_data *priv = policy->driver_data;
struct device *cpu_dev = priv->cpu_dev;
struct regulator *cpu_reg = priv->cpu_reg;
- unsigned long volt = 0, volt_old = 0, tol = 0;
+ unsigned long volt = 0, tol = 0;
+ int volt_old = 0;
unsigned int old_freq, new_freq;
long freq_Hz, freq_exact;
int ret;
@@ -83,7 +84,7 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
opp_freq / 1000, volt);
}
- dev_dbg(cpu_dev, "%u MHz, %ld mV --> %u MHz, %ld mV\n",
+ dev_dbg(cpu_dev, "%u MHz, %d mV --> %u MHz, %ld mV\n",
old_freq / 1000, (volt_old > 0) ? volt_old / 1000 : -1,
new_freq / 1000, volt ? volt / 1000 : -1);
--
1.9.1
--
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