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hwmon: (sch56xx) Use devres functions for watchdog 

Use devm_kzalloc()/devm_watchdog_register() for
watchdog registration since it allows us to remove
the sch56xx_watchdog_data struct from the drivers
own data structs.
Remove sch56xx_watchdog_unregister since devres
takes care of that now.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20210508131457.12780-2-W_Armin@gmx.de
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
[groeck: Dropped unnecessary return; at end of void function]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Armin Wolf 2021-05-08 15:14:54 +02:00 committed by Guenter Roeck
parent ba9c5fc395
commit 2be5f0d753
4 changed files with 16 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/hwmon/sch5627.c
View File

@ -64,7 +64,6 @@ static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
struct sch5627_data {
unsigned short addr;
struct sch56xx_watchdog_data *watchdog;
u8 control;
u8 temp_max[SCH5627_NO_TEMPS];
u8 temp_crit[SCH5627_NO_TEMPS];
@ -357,16 +356,6 @@ static const struct hwmon_chip_info sch5627_chip_info = {
.info = sch5627_info,
};
static int sch5627_remove(struct platform_device *pdev)
{
struct sch5627_data *data = platform_get_drvdata(pdev);
if (data->watchdog)
sch56xx_watchdog_unregister(data->watchdog);
return 0;
}
static int sch5627_probe(struct platform_device *pdev)
{
struct sch5627_data *data;
@ -460,9 +449,9 @@ static int sch5627_probe(struct platform_device *pdev)
return PTR_ERR(hwmon_dev);
/* Note failing to register the watchdog is not a fatal error */
data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
(build_code << 24) | (build_id << 8) | hwmon_rev,
&data->update_lock, 1);
sch56xx_watchdog_register(&pdev->dev, data->addr,
(build_code << 24) | (build_id << 8) | hwmon_rev,
&data->update_lock, 1);
return 0;
}
@ -472,7 +461,6 @@ static struct platform_driver sch5627_driver = {
.name = DRVNAME,
},
.probe = sch5627_probe,
.remove = sch5627_remove,
};
module_platform_driver(sch5627_driver);

9
drivers/hwmon/sch5636.c
View File

@ -54,7 +54,6 @@ static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
struct sch5636_data {
unsigned short addr;
struct device *hwmon_dev;
struct sch56xx_watchdog_data *watchdog;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
@ -372,9 +371,6 @@ static int sch5636_remove(struct platform_device *pdev)
struct sch5636_data *data = platform_get_drvdata(pdev);
int i;
if (data->watchdog)
sch56xx_watchdog_unregister(data->watchdog);
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
@ -495,9 +491,8 @@ static int sch5636_probe(struct platform_device *pdev)
}
/* Note failing to register the watchdog is not a fatal error */
data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
(revision[0] << 8) | revision[1],
&data->update_lock, 0);
sch56xx_watchdog_register(&pdev->dev, data->addr, (revision[0] << 8) | revision[1],
&data->update_lock, 0);
return 0;

28
drivers/hwmon/sch56xx-common.c
View File

@ -378,8 +378,8 @@ static const struct watchdog_ops watchdog_ops = {
.set_timeout = watchdog_set_timeout,
};
struct sch56xx_watchdog_data *sch56xx_watchdog_register(struct device *parent,
u16 addr, u32 revision, struct mutex *io_lock, int check_enabled)
void sch56xx_watchdog_register(struct device *parent, u16 addr, u32 revision,
struct mutex *io_lock, int check_enabled)
{
struct sch56xx_watchdog_data *data;
int err, control, output_enable;
@ -393,17 +393,17 @@ struct sch56xx_watchdog_data *sch56xx_watchdog_register(struct device *parent,
mutex_unlock(io_lock);
if (control < 0)
return NULL;
return;
if (output_enable < 0)
return NULL;
return;
if (check_enabled && !(output_enable & SCH56XX_WDOG_OUTPUT_ENABLE)) {
pr_warn("Watchdog not enabled by BIOS, not registering\n");
return NULL;
return;
}
data = kzalloc(sizeof(struct sch56xx_watchdog_data), GFP_KERNEL);
data = devm_kzalloc(parent, sizeof(struct sch56xx_watchdog_data), GFP_KERNEL);
if (!data)
return NULL;
return;
data->addr = addr;
data->io_lock = io_lock;
@ -438,24 +438,14 @@ struct sch56xx_watchdog_data *sch56xx_watchdog_register(struct device *parent,
data->watchdog_output_enable = output_enable;
watchdog_set_drvdata(&data->wddev, data);
err = watchdog_register_device(&data->wddev);
err = devm_watchdog_register_device(parent, &data->wddev);
if (err) {
pr_err("Registering watchdog chardev: %d\n", err);
kfree(data);
return NULL;
devm_kfree(parent, data);
}
return data;
}
EXPORT_SYMBOL(sch56xx_watchdog_register);
void sch56xx_watchdog_unregister(struct sch56xx_watchdog_data *data)
{
watchdog_unregister_device(&data->wddev);
kfree(data);
}
EXPORT_SYMBOL(sch56xx_watchdog_unregister);
/*
* platform dev find, add and remove functions
*/

4
drivers/hwmon/sch56xx-common.h
View File

@ -14,6 +14,6 @@ int sch56xx_read_virtual_reg16(u16 addr, u16 reg);
int sch56xx_read_virtual_reg12(u16 addr, u16 msb_reg, u16 lsn_reg,
int high_nibble);
struct sch56xx_watchdog_data *sch56xx_watchdog_register(struct device *parent,
u16 addr, u32 revision, struct mutex *io_lock, int check_enabled);
void sch56xx_watchdog_register(struct device *parent, u16 addr, u32 revision,
struct mutex *io_lock, int check_enabled);
void sch56xx_watchdog_unregister(struct sch56xx_watchdog_data *data);