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authorViresh Kumar <viresh.kumar@linaro.org>2017-02-07 07:10:05 +0300
committerZhang Rui <rui.zhang@intel.com>2017-03-13 05:06:55 +0300
commit3ea3217cf91804be6ed9b368ef4ac7911eb1dadc (patch)
treec225c4ee5949f8906fb07a31a174819d0aa40d33 /drivers/thermal/cpu_cooling.c
parent9aec9082bf3c0fb83020a0f562c9cc8078ac91f1 (diff)
downloadlinux-3ea3217cf91804be6ed9b368ef4ac7911eb1dadc.tar.xz
thermal: cpu_cooling: Check OPP for errors
It is possible for dev_pm_opp_find_freq_exact() to return errors. It was all fine earlier as dev_pm_opp_get_voltage() had a check within it to check for invalid OPPs, but dev_pm_opp_put() doesn't have any similar checks and the callers need to make sure OPP is valid before calling them. Also update the later dev_warn_ratelimited() to not print the error message as the OPP is guaranteed to be valid now. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/cpu_cooling.c')
-rw-r--r--drivers/thermal/cpu_cooling.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 59f0bd53f329..69d0f430b2d1 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -393,13 +393,20 @@ static int get_static_power(struct cpufreq_cooling_device *cpufreq_device,
opp = dev_pm_opp_find_freq_exact(cpufreq_device->cpu_dev, freq_hz,
true);
+ if (IS_ERR(opp)) {
+ dev_warn_ratelimited(cpufreq_device->cpu_dev,
+ "Failed to find OPP for frequency %lu: %ld\n",
+ freq_hz, PTR_ERR(opp));
+ return -EINVAL;
+ }
+
voltage = dev_pm_opp_get_voltage(opp);
dev_pm_opp_put(opp);
if (voltage == 0) {
dev_err_ratelimited(cpufreq_device->cpu_dev,
- "Failed to get voltage for frequency %lu: %ld\n",
- freq_hz, IS_ERR(opp) ? PTR_ERR(opp) : 0);
+ "Failed to get voltage for frequency %lu\n",
+ freq_hz);
return -EINVAL;
}