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SubjectRe: [PATCH v2 01/17] thermal: add thermal_zone_set_mode() helper
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On 11/06/2018 09:11 AM, Zhang Rui wrote:
> On 三, 2018-10-17 at 17:52 +0200, Bartlomiej Zolnierkiewicz wrote:
>> In order to remove the code duplication and prepare for further
>> changes:
>>
>> * Add thermal_zone_set_mode() helper. Then update core code and
>> drivers to use it.
>>
>> There should be no functional changes caused by this patch.
>>
>> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
>> ---
>> drivers/thermal/hisi_thermal.c | 14 ++------------
>> drivers/thermal/of-thermal.c | 3 ++-
>> drivers/thermal/rockchip_thermal.c | 26 +++++++++-----------------
>> drivers/thermal/thermal_helpers.c | 14 ++++++++++++++
>> drivers/thermal/thermal_sysfs.c | 8 +++++---
>> include/linux/thermal.h | 5 +++++
>> 6 files changed, 37 insertions(+), 33 deletions(-)
>>
>>
>>
>> diff --git a/drivers/thermal/thermal_helpers.c
>> b/drivers/thermal/thermal_helpers.c
>> index 2ba756a..b18cee2 100644
>> --- a/drivers/thermal/thermal_helpers.c
>> +++ b/drivers/thermal/thermal_helpers.c
>> @@ -224,3 +224,17 @@ int thermal_zone_get_offset(struct
>> thermal_zone_device *tz)
>> return 0;
>> }
>> EXPORT_SYMBOL_GPL(thermal_zone_get_offset);
>> +
>> +/**
>> + * thermal_zone_set_mode() - sets mode of thermal zone device
>> + * @tz: a valid pointer to a struct thermal_zone_device
>> + * @mode: mode to be set
>> + *
>> + * Return: On success returns 0, an error code otherwise.
>> + */
>> +int thermal_zone_set_mode(struct thermal_zone_device *tz,
>> + enum thermal_device_mode mode)
>> +{
>> + return tz->ops->set_mode(tz, mode);
>
> better to check tz->ops->set_mode first.

I think that it should be added incrementally later when needed.

We don't do 'defensive coding' in the kernel and in this patchset
thermal_zone_set_mode() is not used in any place which has not used
->set_mode directly previously (actually patches #1-4 should not
cause any functionality changes as noted in patch descriptions).

> thanks,
> rui
>> +}
>> +EXPORT_SYMBOL_GPL(thermal_zone_set_mode);
>> diff --git a/drivers/thermal/thermal_sysfs.c
>> b/drivers/thermal/thermal_sysfs.c
>> index 2241cea..2e9e762 100644
>> --- a/drivers/thermal/thermal_sysfs.c
>> +++ b/drivers/thermal/thermal_sysfs.c
>> @@ -69,17 +69,19 @@
>> {
>> struct thermal_zone_device *tz = to_thermal_zone(dev);
>> int result;
>> + enum thermal_device_mode mode;
>>
>> if (!tz->ops->set_mode)
>> return -EPERM;
>>
>> if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
>> - result = tz->ops->set_mode(tz,
>> THERMAL_DEVICE_ENABLED);
>> + mode = THERMAL_DEVICE_ENABLED;
>> else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
>> - result = tz->ops->set_mode(tz,
>> THERMAL_DEVICE_DISABLED);
>> + mode = THERMAL_DEVICE_DISABLED;
>> else
>> - result = -EINVAL;
>> + return -EINVAL;
>>
>> + result = thermal_zone_set_mode(tz, mode);
>> if (result)
>> return result;
>>
>> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
>> index 5f4705f..9d21fd1 100644
>> --- a/include/linux/thermal.h
>> +++ b/include/linux/thermal.h
>> @@ -452,6 +452,8 @@ struct thermal_cooling_device *
>> int thermal_zone_get_temp(struct thermal_zone_device *tz, int
>> *temp);
>> int thermal_zone_get_slope(struct thermal_zone_device *tz);
>> int thermal_zone_get_offset(struct thermal_zone_device *tz);
>> +int thermal_zone_set_mode(struct thermal_zone_device *tz,
>> + enum thermal_device_mode mode);
>>
>> int get_tz_trend(struct thermal_zone_device *, int);
>> struct thermal_instance *get_thermal_instance(struct
>> thermal_zone_device *,
>> @@ -518,6 +520,9 @@ static inline int thermal_zone_get_slope(
>> static inline int thermal_zone_get_offset(
>> struct thermal_zone_device *tz)
>> { return -ENODEV; }
>> +static inline int thermal_zone_set_mode(
>> + struct thermal_zone_device *tz, enum
>> thermal_device_mode mode)
>> +{ return -ENODEV; }
>> static inline int get_tz_trend(struct thermal_zone_device *tz, int
>> trip)
>> { return -ENODEV; }
>> static inline struct thermal_instance *

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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