PM / OPP: Don't use OPP structure outside of rcu protected section
The OPP structure must not be used out of the rcu protected section. Cache the values to be used in separate variables instead. Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
579c49efdf
commit
dc39d06fcd
@ -584,6 +584,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
|
||||
struct clk *clk;
|
||||
unsigned long freq, old_freq;
|
||||
unsigned long u_volt, u_volt_min, u_volt_max;
|
||||
unsigned long old_u_volt, old_u_volt_min, old_u_volt_max;
|
||||
int ret;
|
||||
|
||||
if (unlikely(!target_freq)) {
|
||||
@ -633,6 +634,14 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (IS_ERR(old_opp)) {
|
||||
old_u_volt = 0;
|
||||
} else {
|
||||
old_u_volt = old_opp->u_volt;
|
||||
old_u_volt_min = old_opp->u_volt_min;
|
||||
old_u_volt_max = old_opp->u_volt_max;
|
||||
}
|
||||
|
||||
u_volt = opp->u_volt;
|
||||
u_volt_min = opp->u_volt_min;
|
||||
u_volt_max = opp->u_volt_max;
|
||||
@ -677,9 +686,10 @@ restore_freq:
|
||||
__func__, old_freq);
|
||||
restore_voltage:
|
||||
/* This shouldn't harm even if the voltages weren't updated earlier */
|
||||
if (!IS_ERR(old_opp))
|
||||
_set_opp_voltage(dev, reg, old_opp->u_volt,
|
||||
old_opp->u_volt_min, old_opp->u_volt_max);
|
||||
if (old_u_volt) {
|
||||
_set_opp_voltage(dev, reg, old_u_volt, old_u_volt_min,
|
||||
old_u_volt_max);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user