| Message ID | 20200717164217.18819-1-daniel.lezcano@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Delegated to: | Zhang Rui |
| Headers | show |
| Series | [1/2] thermal: netlink: Improve the initcall ordering | expand |
On Fri, Jul 17, 2020 at 10:12 PM Daniel Lezcano <daniel.lezcano@linaro.org> wrote: > > The initcalls like to play joke. In our case, the thermal-netlink > initcall is called after the thermal-core initcall but this one sends > a notification before the former is initialzed. No issue was spotted, typo: initialized > but it could lead to a memory corruption, so instead of relying on the > core_initcall for the thermal-netlink, let's initialize directly from > the thermal-core init routine, so we have full control of the init > ordering. > Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> > Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> > --- > drivers/thermal/thermal_core.c | 4 ++++ > drivers/thermal/thermal_netlink.c | 3 +-- > drivers/thermal/thermal_netlink.h | 6 ++++++ > 3 files changed, 11 insertions(+), 2 deletions(-) > > diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c > index 25ef29123f72..c2e7d7aaa354 100644 > --- a/drivers/thermal/thermal_core.c > +++ b/drivers/thermal/thermal_core.c > @@ -1581,6 +1581,10 @@ static int __init thermal_init(void) > { > int result; > > + result = thermal_netlink_init(); > + if (result) > + goto error; > + > mutex_init(&poweroff_lock); > result = thermal_register_governors(); > if (result) > diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c > index dd0a3b889674..42eace7401da 100644 > --- a/drivers/thermal/thermal_netlink.c > +++ b/drivers/thermal/thermal_netlink.c > @@ -641,8 +641,7 @@ static struct genl_family thermal_gnl_family __ro_after_init = { > .n_mcgrps = ARRAY_SIZE(thermal_genl_mcgrps), > }; > > -static int __init thermal_netlink_init(void) > +int __init thermal_netlink_init(void) > { > return genl_register_family(&thermal_gnl_family); > } > -core_initcall(thermal_netlink_init); > diff --git a/drivers/thermal/thermal_netlink.h b/drivers/thermal/thermal_netlink.h > index 0ec28d105da5..828d1dddfa98 100644 > --- a/drivers/thermal/thermal_netlink.h > +++ b/drivers/thermal/thermal_netlink.h > @@ -6,6 +6,7 @@ > > /* Netlink notification function */ > #ifdef CONFIG_THERMAL_NETLINK > +int __init thermal_netlink_init(void); > int thermal_notify_tz_create(int tz_id, const char *name); > int thermal_notify_tz_delete(int tz_id); > int thermal_notify_tz_enable(int tz_id); > @@ -23,6 +24,11 @@ int thermal_notify_cdev_delete(int cdev_id); > int thermal_notify_tz_gov_change(int tz_id, const char *name); > int thermal_genl_sampling_temp(int id, int temp); > #else > +static inline int thermal_netlink_init(void) > +{ > + return 0; > +} > + > static inline int thermal_notify_tz_create(int tz_id, const char *name) > { > return 0; > -- > 2.17.1 >
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 25ef29123f72..c2e7d7aaa354 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1581,6 +1581,10 @@ static int __init thermal_init(void) { int result; + result = thermal_netlink_init(); + if (result) + goto error; + mutex_init(&poweroff_lock); result = thermal_register_governors(); if (result) diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c index dd0a3b889674..42eace7401da 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -641,8 +641,7 @@ static struct genl_family thermal_gnl_family __ro_after_init = { .n_mcgrps = ARRAY_SIZE(thermal_genl_mcgrps), }; -static int __init thermal_netlink_init(void) +int __init thermal_netlink_init(void) { return genl_register_family(&thermal_gnl_family); } -core_initcall(thermal_netlink_init); diff --git a/drivers/thermal/thermal_netlink.h b/drivers/thermal/thermal_netlink.h index 0ec28d105da5..828d1dddfa98 100644 --- a/drivers/thermal/thermal_netlink.h +++ b/drivers/thermal/thermal_netlink.h @@ -6,6 +6,7 @@ /* Netlink notification function */ #ifdef CONFIG_THERMAL_NETLINK +int __init thermal_netlink_init(void); int thermal_notify_tz_create(int tz_id, const char *name); int thermal_notify_tz_delete(int tz_id); int thermal_notify_tz_enable(int tz_id); @@ -23,6 +24,11 @@ int thermal_notify_cdev_delete(int cdev_id); int thermal_notify_tz_gov_change(int tz_id, const char *name); int thermal_genl_sampling_temp(int id, int temp); #else +static inline int thermal_netlink_init(void) +{ + return 0; +} + static inline int thermal_notify_tz_create(int tz_id, const char *name) { return 0;