diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2019-01-04 12:44:33 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-01-04 14:19:40 +0300 |
| commit | 1690d8bb91e370ab772062b79bd434ce815c4729 (patch) | |
| tree | 771cc5574ef13762a994cc4184c16dfae559cf4d /drivers/cpufreq/scmi-cpufreq.c | |
| parent | 088d923a11e683af28ad9cea9b66782fff588495 (diff) | |
| download | linux-1690d8bb91e370ab772062b79bd434ce815c4729.tar.xz | |
cpufreq: scpi/scmi: Fix freeing of dynamic OPPs
Since the commit 2a4eb7358aba "OPP: Don't remove dynamic OPPs from
_dev_pm_opp_remove_table()", dynamically created OPP aren't
automatically removed anymore by dev_pm_opp_cpumask_remove_table(). This
affects the scpi and scmi cpufreq drivers which no longer free OPPs on
failures or on invocations of the policy->exit() callback.
Create a generic OPP helper dev_pm_opp_remove_all_dynamic() which can be
called from these drivers instead of dev_pm_opp_cpumask_remove_table().
In dev_pm_opp_remove_all_dynamic(), we need to make sure that the
opp_list isn't getting accessed simultaneously from other parts of the
OPP core while the helper is freeing dynamic OPPs, i.e. we can't drop
the opp_table->lock while traversing through the OPP list. And to
accomplish that, this patch also creates _opp_kref_release_unlocked()
which can be called from this new helper with the opp_table lock already
held.
Cc: 4.20 <stable@vger.kernel.org> # v4.20
Reported-by: Valentin Schneider <valentin.schneider@arm.com>
Fixes: 2a4eb7358aba "OPP: Don't remove dynamic OPPs from _dev_pm_opp_remove_table()"
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/scmi-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/scmi-cpufreq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 50b1551ba894..c2e66528f5ee 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -176,7 +176,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) out_free_priv: kfree(priv); out_free_opp: - dev_pm_opp_cpumask_remove_table(policy->cpus); + dev_pm_opp_remove_all_dynamic(cpu_dev); return ret; } @@ -188,7 +188,7 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy) cpufreq_cooling_unregister(priv->cdev); dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table); kfree(priv); - dev_pm_opp_cpumask_remove_table(policy->related_cpus); + dev_pm_opp_remove_all_dynamic(priv->cpu_dev); return 0; } |