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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2008-06-23 22:23:05 +0200
committerJohn W. Linville <linville@tuxdriver.com>2008-06-26 20:21:21 +0200
commitffb67c34e436fb163c4067936ccec797354fa6c6 (patch)
tree58553e810c7d55595c82d6d397fa4027be1da7ae
parentrfkill: add type string helper (diff)
downloadlinux-ffb67c34e436fb163c4067936ccec797354fa6c6.tar.xz
linux-ffb67c34e436fb163c4067936ccec797354fa6c6.zip
rfkill: add uevent notifications
Use the notification chains to also send uevents, so that userspace can be notified of state changes of every rfkill switch. Userspace should use these events for OSD/status report applications and rfkill GUI frontends. HAL might want to broadcast them over DBUS, for example. It might be also useful for userspace implementations of rfkill-input, or to use HAL as the platform driver which promotes rfkill switch change events into input events (to synchronize all other switches) when necessary for platforms that lack a convenient platform-specific kernel module to do it. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Acked-by: Ivo van Doorn <IvDoorn@gmail.com> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/rfkill/rfkill.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 3c7773475ea6..dd1c3f18f31d 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -386,12 +386,51 @@ static int rfkill_resume(struct device *dev)
#define rfkill_resume NULL
#endif
+static int rfkill_blocking_uevent_notifier(struct notifier_block *nb,
+ unsigned long eventid,
+ void *data)
+{
+ struct rfkill *rfkill = (struct rfkill *)data;
+
+ switch (eventid) {
+ case RFKILL_STATE_CHANGED:
+ kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block rfkill_blocking_uevent_nb = {
+ .notifier_call = rfkill_blocking_uevent_notifier,
+ .priority = 0,
+};
+
+static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+ int error;
+
+ error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
+ if (error)
+ return error;
+ error = add_uevent_var(env, "RFKILL_TYPE=%s",
+ rfkill_get_type_str(rfkill->type));
+ if (error)
+ return error;
+ error = add_uevent_var(env, "RFKILL_STATE=%d", rfkill->state);
+ return error;
+}
+
static struct class rfkill_class = {
.name = "rfkill",
.dev_release = rfkill_release,
.dev_attrs = rfkill_dev_attrs,
.suspend = rfkill_suspend,
.resume = rfkill_resume,
+ .dev_uevent = rfkill_dev_uevent,
};
static int rfkill_add_switch(struct rfkill *rfkill)
@@ -566,11 +605,14 @@ static int __init rfkill_init(void)
return error;
}
+ register_rfkill_notifier(&rfkill_blocking_uevent_nb);
+
return 0;
}
static void __exit rfkill_exit(void)
{
+ unregister_rfkill_notifier(&rfkill_blocking_uevent_nb);
class_unregister(&rfkill_class);
}