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 --- drivers/thermal/devfreq_cooling.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c index cf71550b9d00..ee013fc02980 100644 --- a/drivers/thermal/devfreq_cooling.c +++ b/drivers/thermal/devfreq_cooling.c @@ -225,13 +225,20 @@ 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_warn_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_warn_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; }