diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2017-02-07 09:40:03 +0530 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2017-03-13 10:06:42 +0800 |
| commit | afd1f4e0a76f0c56422af7056942f28578f1643e (patch) | |
| tree | 86382e93001bc19f362e6fb4bf3e4af83c87c1fc /drivers/thermal | |
| parent | 8327b830f293ff48eaade64b4fc2e247b7655615 (diff) | |
thermal: devfreq: 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')
| -rw-r--r-- | drivers/thermal/devfreq_cooling.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c index e99d0e026a53..4bf4ad58cffd 100644 --- a/drivers/thermal/devfreq_cooling.c +++ b/drivers/thermal/devfreq_cooling.c @@ -189,13 +189,19 @@ get_static_power(struct devfreq_cooling_device *dfc, unsigned long freq) if (PTR_ERR(opp) == -ERANGE) opp = dev_pm_opp_find_freq_exact(dev, freq, false); + if (IS_ERR(opp)) { + dev_err_ratelimited(dev, "Failed to find OPP for frequency %lu: %ld\n", + freq, PTR_ERR(opp)); + return 0; + } + voltage = dev_pm_opp_get_voltage(opp) / 1000; /* mV */ dev_pm_opp_put(opp); if (voltage == 0) { dev_err_ratelimited(dev, - "Failed to get voltage for frequency %lu: %ld\n", - freq, IS_ERR(opp) ? PTR_ERR(opp) : 0); + "Failed to get voltage for frequency %lu\n", + freq); return 0; } |