From 3c803e8e2f15d02c5ad0a3888eea2bbd31dc59c5 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 27 Jun 2005 17:49:45 -0700 Subject: Commit the manual part of the input layer merge. git did actually warn me about the fact that I hadn't actually done an "update-cache" on these two files, but the warning was at the bottom of a list of all the files that _did_ change in the merge, so I never noticed. My bad. --- drivers/input/serio/serio.c | 89 +++++++++++++++++++++++++++++++-------------- 1 file changed, 62 insertions(+), 27 deletions(-) (limited to 'drivers/input/serio/serio.c') diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c index 341824c4852..f367695e69b 100644 --- a/drivers/input/serio/serio.c +++ b/drivers/input/serio/serio.c @@ -31,10 +31,9 @@ #include #include #include -#include #include -#include #include +#include MODULE_AUTHOR("Vojtech Pavlik "); MODULE_DESCRIPTION("Serio abstraction core"); @@ -43,6 +42,7 @@ MODULE_LICENSE("GPL"); EXPORT_SYMBOL(serio_interrupt); EXPORT_SYMBOL(__serio_register_port); EXPORT_SYMBOL(serio_unregister_port); +EXPORT_SYMBOL(serio_unregister_child_port); EXPORT_SYMBOL(__serio_unregister_port_delayed); EXPORT_SYMBOL(__serio_register_driver); EXPORT_SYMBOL(serio_unregister_driver); @@ -68,6 +68,37 @@ static void serio_destroy_port(struct serio *serio); static void serio_reconnect_port(struct serio *serio); static void serio_disconnect_port(struct serio *serio); +static int serio_connect_driver(struct serio *serio, struct serio_driver *drv) +{ + int retval; + + down(&serio->drv_sem); + retval = drv->connect(serio, drv); + up(&serio->drv_sem); + + return retval; +} + +static int serio_reconnect_driver(struct serio *serio) +{ + int retval = -1; + + down(&serio->drv_sem); + if (serio->drv && serio->drv->reconnect) + retval = serio->drv->reconnect(serio); + up(&serio->drv_sem); + + return retval; +} + +static void serio_disconnect_driver(struct serio *serio) +{ + down(&serio->drv_sem); + if (serio->drv) + serio->drv->disconnect(serio); + up(&serio->drv_sem); +} + static int serio_match_port(const struct serio_device_id *ids, struct serio *serio) { while (ids->type || ids->proto) { @@ -91,7 +122,7 @@ static void serio_bind_driver(struct serio *serio, struct serio_driver *drv) if (serio_match_port(drv->id_table, serio)) { serio->dev.driver = &drv->driver; - if (drv->connect(serio, drv)) { + if (serio_connect_driver(serio, drv)) { serio->dev.driver = NULL; goto out; } @@ -138,8 +169,7 @@ struct serio_event { static DEFINE_SPINLOCK(serio_event_lock); /* protects serio_event_list */ static LIST_HEAD(serio_event_list); static DECLARE_WAIT_QUEUE_HEAD(serio_wait); -static DECLARE_COMPLETION(serio_exited); -static int serio_pid; +static struct task_struct *serio_task; static void serio_queue_event(void *object, struct module *owner, enum serio_event_type event_type) @@ -150,12 +180,12 @@ static void serio_queue_event(void *object, struct module *owner, spin_lock_irqsave(&serio_event_lock, flags); /* - * Scan event list for the other events for the same serio port, + * Scan event list for the other events for the same serio port, * starting with the most recent one. If event is the same we * do not need add new one. If event is of different type we * need to add this event and should not look further because * we need to preseve sequence of distinct events. - */ + */ list_for_each_entry_reverse(event, &serio_event_list, node) { if (event->object == object) { if (event->type == event_type) @@ -337,20 +367,15 @@ static struct serio *serio_get_pending_child(struct serio *parent) static int serio_thread(void *nothing) { - lock_kernel(); - daemonize("kseriod"); - allow_signal(SIGTERM); - do { serio_handle_events(); - wait_event_interruptible(serio_wait, !list_empty(&serio_event_list)); + wait_event_interruptible(serio_wait, + kthread_should_stop() || !list_empty(&serio_event_list)); try_to_freeze(); - } while (!signal_pending(current)); + } while (!kthread_should_stop()); printk(KERN_DEBUG "serio: kseriod exiting\n"); - - unlock_kernel(); - complete_and_exit(&serio_exited, 0); + return 0; } @@ -557,7 +582,7 @@ static void serio_destroy_port(struct serio *serio) static void serio_reconnect_port(struct serio *serio) { do { - if (!serio->drv || !serio->drv->reconnect || serio->drv->reconnect(serio)) { + if (serio_reconnect_driver(serio)) { serio_disconnect_port(serio); serio_find_driver(serio); /* Ok, old children are now gone, we are done */ @@ -629,6 +654,19 @@ void serio_unregister_port(struct serio *serio) up(&serio_sem); } +/* + * Safely unregisters child port if one is present. + */ +void serio_unregister_child_port(struct serio *serio) +{ + down(&serio_sem); + if (serio->child) { + serio_disconnect_port(serio->child); + serio_destroy_port(serio->child); + } + up(&serio_sem); +} + /* * Submits register request to kseriod for subsequent execution. * Can be used when it is not obvious whether the serio_sem is @@ -686,15 +724,14 @@ static int serio_driver_probe(struct device *dev) struct serio *serio = to_serio_port(dev); struct serio_driver *drv = to_serio_driver(dev->driver); - return drv->connect(serio, drv); + return serio_connect_driver(serio, drv); } static int serio_driver_remove(struct device *dev) { struct serio *serio = to_serio_port(dev); - struct serio_driver *drv = to_serio_driver(dev->driver); - drv->disconnect(serio); + serio_disconnect_driver(serio); return 0; } @@ -730,11 +767,9 @@ start_over: static void serio_set_drv(struct serio *serio, struct serio_driver *drv) { - down(&serio->drv_sem); serio_pause_rx(serio); serio->drv = drv; serio_continue_rx(serio); - up(&serio->drv_sem); } static int serio_bus_match(struct device *dev, struct device_driver *drv) @@ -794,7 +829,7 @@ static int serio_resume(struct device *dev) { struct serio *serio = to_serio_port(dev); - if (!serio->drv || !serio->drv->reconnect || serio->drv->reconnect(serio)) { + if (serio_reconnect_driver(serio)) { /* * Driver re-probing can take a while, so better let kseriod * deal with it. @@ -848,9 +883,10 @@ irqreturn_t serio_interrupt(struct serio *serio, static int __init serio_init(void) { - if (!(serio_pid = kernel_thread(serio_thread, NULL, CLONE_KERNEL))) { + serio_task = kthread_run(serio_thread, NULL, "kseriod"); + if (IS_ERR(serio_task)) { printk(KERN_ERR "serio: Failed to start kseriod\n"); - return -1; + return PTR_ERR(serio_task); } serio_bus.dev_attrs = serio_device_attrs; @@ -866,8 +902,7 @@ static int __init serio_init(void) static void __exit serio_exit(void) { bus_unregister(&serio_bus); - kill_proc(serio_pid, SIGTERM, 1); - wait_for_completion(&serio_exited); + kthread_stop(serio_task); } module_init(serio_init); -- cgit v1.2.3-70-g09d2