watchdog: Create watchdog device in watchdog_dev.c
The watchdog character device is currently created in watchdog_dev.c,
and the watchdog device in watchdog_core.c. This results in
cross-dependencies, since device creation needs to know the watchdog
character device number as well as the watchdog class, both of which
reside in watchdog_dev.c.
Create the watchdog device in watchdog_dev.c to simplify the code.
Inspired by earlier patch set from Damien Riegel.
Cc: Damien Riegel <damien.riegel@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index 551af04..f0293f7 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -42,7 +42,6 @@
#include "watchdog_core.h" /* For watchdog_dev_register/... */
static DEFINE_IDA(watchdog_ida);
-static struct class *watchdog_class;
/*
* Deferred Registration infrastructure.
@@ -194,7 +193,7 @@
static int __watchdog_register_device(struct watchdog_device *wdd)
{
- int ret, id = -1, devno;
+ int ret, id = -1;
if (wdd == NULL || wdd->info == NULL || wdd->ops == NULL)
return -EINVAL;
@@ -247,16 +246,6 @@
}
}
- devno = wdd->cdev.dev;
- wdd->dev = device_create(watchdog_class, wdd->parent, devno,
- wdd, "watchdog%d", wdd->id);
- if (IS_ERR(wdd->dev)) {
- watchdog_dev_unregister(wdd);
- ida_simple_remove(&watchdog_ida, id);
- ret = PTR_ERR(wdd->dev);
- return ret;
- }
-
if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status)) {
wdd->reboot_nb.notifier_call = watchdog_reboot_notifier;
@@ -265,9 +254,7 @@
dev_err(wdd->dev, "Cannot register reboot notifier (%d)\n",
ret);
watchdog_dev_unregister(wdd);
- device_destroy(watchdog_class, devno);
ida_simple_remove(&watchdog_ida, wdd->id);
- wdd->dev = NULL;
return ret;
}
}
@@ -311,9 +298,6 @@
static void __watchdog_unregister_device(struct watchdog_device *wdd)
{
- int ret;
- int devno;
-
if (wdd == NULL)
return;
@@ -323,13 +307,8 @@
if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status))
unregister_reboot_notifier(&wdd->reboot_nb);
- devno = wdd->cdev.dev;
- ret = watchdog_dev_unregister(wdd);
- if (ret)
- pr_err("error unregistering /dev/watchdog (err=%d)\n", ret);
- device_destroy(watchdog_class, devno);
+ watchdog_dev_unregister(wdd);
ida_simple_remove(&watchdog_ida, wdd->id);
- wdd->dev = NULL;
}
/**
@@ -370,9 +349,11 @@
static int __init watchdog_init(void)
{
- watchdog_class = watchdog_dev_init();
- if (IS_ERR(watchdog_class))
- return PTR_ERR(watchdog_class);
+ int err;
+
+ err = watchdog_dev_init();
+ if (err < 0)
+ return err;
watchdog_deferred_registration();
return 0;