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watchdog: Use static struct class watchdog_class in stead of pointer 

We need few sysfs attributes to know different status of a watchdog device.
To do that, we need to associate .dev_groups with watchdog_class. So
convert it from pointer to static.
Putting this static struct in watchdog_dev.c, so that static device
attributes defined in that file can be attached to it.

Signed-off-by: Pratyush Anand <panand@redhat.com>
Suggested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Pratyush Anand 2015-12-17 17:53:58 +05:30 committed by Wim Van Sebroeck
parent d68106bbec
commit 906d7a5cfe
3 changed files with 25 additions and 18 deletions
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15
drivers/watchdog/watchdog_core.c
View File

@ -370,19 +370,9 @@ static int __init watchdog_deferred_registration(void)
static int __init watchdog_init(void)
{
int err;
watchdog_class = class_create(THIS_MODULE, "watchdog");
if (IS_ERR(watchdog_class)) {
pr_err("couldn't create class\n");
watchdog_class = watchdog_dev_init();
if (IS_ERR(watchdog_class))
return PTR_ERR(watchdog_class);
}
err = watchdog_dev_init();
if (err < 0) {
class_destroy(watchdog_class);
return err;
}
watchdog_deferred_registration();
return 0;
@ -391,7 +381,6 @@ static int __init watchdog_init(void)
static void __exit watchdog_exit(void)
{
watchdog_dev_exit();
class_destroy(watchdog_class);
ida_destroy(&watchdog_ida);
}

2
drivers/watchdog/watchdog_core.h
View File

@ -33,5 +33,5 @@
*/
extern int watchdog_dev_register(struct watchdog_device *);
extern int watchdog_dev_unregister(struct watchdog_device *);
extern int __init watchdog_dev_init(void);
extern struct class * __init watchdog_dev_init(void);
extern void __exit watchdog_dev_exit(void);

26
drivers/watchdog/watchdog_dev.c
View File

@ -581,18 +581,35 @@ int watchdog_dev_unregister(struct watchdog_device *wdd)
return 0;
}
static struct class watchdog_class = {
.name = "watchdog",
.owner = THIS_MODULE,
};
/*
* watchdog_dev_init: init dev part of watchdog core
*
* Allocate a range of chardev nodes to use for watchdog devices
*/
int __init watchdog_dev_init(void)
struct class * __init watchdog_dev_init(void)
{
int err = alloc_chrdev_region(&watchdog_devt, 0, MAX_DOGS, "watchdog");
if (err < 0)
int err;
err = class_register(&watchdog_class);
if (err < 0) {
pr_err("couldn't register class\n");
return ERR_PTR(err);
}
err = alloc_chrdev_region(&watchdog_devt, 0, MAX_DOGS, "watchdog");
if (err < 0) {
pr_err("watchdog: unable to allocate char dev region\n");
return err;
class_unregister(&watchdog_class);
return ERR_PTR(err);
}
return &watchdog_class;
}
/*
@ -604,4 +621,5 @@ int __init watchdog_dev_init(void)
void __exit watchdog_dev_exit(void)
{
unregister_chrdev_region(watchdog_devt, MAX_DOGS);
class_unregister(&watchdog_class);
}