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-rw-r--r--drivers/input/gameport/gameport.c31
-rw-r--r--drivers/input/serio/serio.c89
2 files changed, 74 insertions, 46 deletions
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index c77a82e4605..3e72c9b1461 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -17,11 +17,10 @@
#include <linux/init.h>
#include <linux/gameport.h>
#include <linux/wait.h>
-#include <linux/completion.h>
#include <linux/sched.h>
-#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/kthread.h>
/*#include <asm/io.h>*/
@@ -238,8 +237,7 @@ struct gameport_event {
static DEFINE_SPINLOCK(gameport_event_lock); /* protects gameport_event_list */
static LIST_HEAD(gameport_event_list);
static DECLARE_WAIT_QUEUE_HEAD(gameport_wait);
-static DECLARE_COMPLETION(gameport_exited);
-static int gameport_pid;
+static struct task_struct *gameport_task;
static void gameport_queue_event(void *object, struct module *owner,
enum gameport_event_type event_type)
@@ -250,12 +248,12 @@ static void gameport_queue_event(void *object, struct module *owner,
spin_lock_irqsave(&gameport_event_lock, flags);
/*
- * Scan event list for the other events for the same gameport port,
+ * Scan event list for the other events for the same gameport 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, &gameport_event_list, node) {
if (event->object == object) {
if (event->type == event_type)
@@ -432,20 +430,15 @@ static struct gameport *gameport_get_pending_child(struct gameport *parent)
static int gameport_thread(void *nothing)
{
- lock_kernel();
- daemonize("kgameportd");
- allow_signal(SIGTERM);
-
do {
gameport_handle_events();
- wait_event_interruptible(gameport_wait, !list_empty(&gameport_event_list));
+ wait_event_interruptible(gameport_wait,
+ kthread_should_stop() || !list_empty(&gameport_event_list));
try_to_freeze();
- } while (!signal_pending(current));
+ } while (!kthread_should_stop());
printk(KERN_DEBUG "gameport: kgameportd exiting\n");
-
- unlock_kernel();
- complete_and_exit(&gameport_exited, 0);
+ return 0;
}
@@ -773,9 +766,10 @@ void gameport_close(struct gameport *gameport)
static int __init gameport_init(void)
{
- if (!(gameport_pid = kernel_thread(gameport_thread, NULL, CLONE_KERNEL))) {
+ gameport_task = kthread_run(gameport_thread, NULL, "kgameportd");
+ if (IS_ERR(gameport_task)) {
printk(KERN_ERR "gameport: Failed to start kgameportd\n");
- return -1;
+ return PTR_ERR(gameport_task);
}
gameport_bus.dev_attrs = gameport_device_attrs;
@@ -789,8 +783,7 @@ static int __init gameport_init(void)
static void __exit gameport_exit(void)
{
bus_unregister(&gameport_bus);
- kill_proc(gameport_pid, SIGTERM, 1);
- wait_for_completion(&gameport_exited);
+ kthread_stop(gameport_task);
}
module_init(gameport_init);
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 <linux/serio.h>
#include <linux/errno.h>
#include <linux/wait.h>
-#include <linux/completion.h>
#include <linux/sched.h>
-#include <linux/smp_lock.h>
#include <linux/slab.h>
+#include <linux/kthread.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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 */
@@ -630,6 +655,19 @@ void serio_unregister_port(struct serio *serio)
}
/*
+ * 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
* taken or not and when delayed execution is feasible.
@@ -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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 21:02:26 +0000