| Message ID | 20230828120959.24680-1-sumitg@nvidia.com (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | viresh kumar |
| Headers | show |
| Series | cpufreq: tegra194: fix warning due to missing opp_put | expand |
On 28-08-23, 17:39, Sumit Gupta wrote: > Fix the warning due to missing dev_pm_opp_put() call and hence > wrong refcount value. This causes below warning message when > trying to remove the module. > > Call trace: > dev_pm_opp_put_opp_table+0x154/0x15c > dev_pm_opp_remove_table+0x34/0xa0 > _dev_pm_opp_cpumask_remove_table+0x7c/0xbc > dev_pm_opp_of_cpumask_remove_table+0x10/0x18 > tegra194_cpufreq_exit+0x24/0x34 [tegra194_cpufreq] > cpufreq_remove_dev+0xa8/0xf8 > subsys_interface_unregister+0x90/0xe8 > cpufreq_unregister_driver+0x54/0x9c > tegra194_cpufreq_remove+0x18/0x2c [tegra194_cpufreq] > platform_remove+0x24/0x74 > device_remove+0x48/0x78 > device_release_driver_internal+0xc8/0x160 > driver_detach+0x4c/0x90 > bus_remove_driver+0x68/0xb8 > driver_unregister+0x2c/0x58 > platform_driver_unregister+0x10/0x18 > tegra194_ccplex_driver_exit+0x14/0x1e0 [tegra194_cpufreq] > __arm64_sys_delete_module+0x184/0x270 > > Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth") > Signed-off-by: Sumit Gupta <sumitg@nvidia.com> > --- > drivers/cpufreq/tegra194-cpufreq.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c > index 88ef5e57ccd0..f63f7a6c2034 100644 > --- a/drivers/cpufreq/tegra194-cpufreq.c > +++ b/drivers/cpufreq/tegra194-cpufreq.c > @@ -454,6 +454,8 @@ static int tegra_cpufreq_init_cpufreq_table(struct cpufreq_policy *policy, You need to put the OPP here, even if this fails. > if (ret < 0) > return ret; > > + dev_pm_opp_put(opp); > + > freq_table[j].driver_data = pos->driver_data; > freq_table[j].frequency = pos->frequency; > j++; > -- > 2.17.1
On 29/08/23 11:29, Viresh Kumar wrote: > External email: Use caution opening links or attachments > > > On 28-08-23, 17:39, Sumit Gupta wrote: >> Fix the warning due to missing dev_pm_opp_put() call and hence >> wrong refcount value. This causes below warning message when >> trying to remove the module. >> >> Call trace: >> dev_pm_opp_put_opp_table+0x154/0x15c >> dev_pm_opp_remove_table+0x34/0xa0 >> _dev_pm_opp_cpumask_remove_table+0x7c/0xbc >> dev_pm_opp_of_cpumask_remove_table+0x10/0x18 >> tegra194_cpufreq_exit+0x24/0x34 [tegra194_cpufreq] >> cpufreq_remove_dev+0xa8/0xf8 >> subsys_interface_unregister+0x90/0xe8 >> cpufreq_unregister_driver+0x54/0x9c >> tegra194_cpufreq_remove+0x18/0x2c [tegra194_cpufreq] >> platform_remove+0x24/0x74 >> device_remove+0x48/0x78 >> device_release_driver_internal+0xc8/0x160 >> driver_detach+0x4c/0x90 >> bus_remove_driver+0x68/0xb8 >> driver_unregister+0x2c/0x58 >> platform_driver_unregister+0x10/0x18 >> tegra194_ccplex_driver_exit+0x14/0x1e0 [tegra194_cpufreq] >> __arm64_sys_delete_module+0x184/0x270 >> >> Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth") >> Signed-off-by: Sumit Gupta <sumitg@nvidia.com> >> --- >> drivers/cpufreq/tegra194-cpufreq.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c >> index 88ef5e57ccd0..f63f7a6c2034 100644 >> --- a/drivers/cpufreq/tegra194-cpufreq.c >> +++ b/drivers/cpufreq/tegra194-cpufreq.c >> @@ -454,6 +454,8 @@ static int tegra_cpufreq_init_cpufreq_table(struct cpufreq_policy *policy, > > You need to put the OPP here, even if this fails. > Sent v2 with the change. Thank you for pointing. Regards, Sumit Gupta >> if (ret < 0) >> return ret; >> >> + dev_pm_opp_put(opp); >> + >> freq_table[j].driver_data = pos->driver_data; >> freq_table[j].frequency = pos->frequency; >> j++; >> -- >> 2.17.1 > > -- > viresh
diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c index 88ef5e57ccd0..f63f7a6c2034 100644 --- a/drivers/cpufreq/tegra194-cpufreq.c +++ b/drivers/cpufreq/tegra194-cpufreq.c @@ -454,6 +454,8 @@ static int tegra_cpufreq_init_cpufreq_table(struct cpufreq_policy *policy, if (ret < 0) return ret; + dev_pm_opp_put(opp); + freq_table[j].driver_data = pos->driver_data; freq_table[j].frequency = pos->frequency; j++;
Fix the warning due to missing dev_pm_opp_put() call and hence wrong refcount value. This causes below warning message when trying to remove the module. Call trace: dev_pm_opp_put_opp_table+0x154/0x15c dev_pm_opp_remove_table+0x34/0xa0 _dev_pm_opp_cpumask_remove_table+0x7c/0xbc dev_pm_opp_of_cpumask_remove_table+0x10/0x18 tegra194_cpufreq_exit+0x24/0x34 [tegra194_cpufreq] cpufreq_remove_dev+0xa8/0xf8 subsys_interface_unregister+0x90/0xe8 cpufreq_unregister_driver+0x54/0x9c tegra194_cpufreq_remove+0x18/0x2c [tegra194_cpufreq] platform_remove+0x24/0x74 device_remove+0x48/0x78 device_release_driver_internal+0xc8/0x160 driver_detach+0x4c/0x90 bus_remove_driver+0x68/0xb8 driver_unregister+0x2c/0x58 platform_driver_unregister+0x10/0x18 tegra194_ccplex_driver_exit+0x14/0x1e0 [tegra194_cpufreq] __arm64_sys_delete_module+0x184/0x270 Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth") Signed-off-by: Sumit Gupta <sumitg@nvidia.com> --- drivers/cpufreq/tegra194-cpufreq.c | 2 ++ 1 file changed, 2 insertions(+)