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[PATCH] USB: khubd: use kthread API

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Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
akpm@osdl.org 2005-06-20 14:29:58 -07:00 committed by Greg Kroah-Hartman
parent e8116e84b5
commit 9c8d61783e
1 changed files with 11 additions and 29 deletions
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40
drivers/usb/core/hub.c
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@ -26,6 +26,7 @@
#include <linux/ioctl.h>
#include <linux/usb.h>
#include <linux/usbdevice_fs.h>
#include <linux/kthread.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
@ -47,8 +48,7 @@ static LIST_HEAD(hub_event_list); /* List of hubs needing servicing */
/* Wakes up khubd */
static DECLARE_WAIT_QUEUE_HEAD(khubd_wait);
static pid_t khubd_pid = 0; /* PID of khubd */
static DECLARE_COMPLETION(khubd_exited);
static struct task_struct *khubd_task;
/* cycle leds on hubs that aren't blinking for attention */
static int blinkenlights = 0;
@ -2807,23 +2807,16 @@ loop:
static int hub_thread(void *__unused)
{
/*
* This thread doesn't need any user-level access,
* so get rid of all our resources
*/
daemonize("khubd");
allow_signal(SIGKILL);
/* Send me a signal to get me die (for debugging) */
do {
hub_events();
wait_event_interruptible(khubd_wait, !list_empty(&hub_event_list));
wait_event_interruptible(khubd_wait,
!list_empty(&hub_event_list) ||
kthread_should_stop());
try_to_freeze();
} while (!signal_pending(current));
} while (!kthread_should_stop() || !list_empty(&hub_event_list));
pr_debug ("%s: khubd exiting\n", usbcore_name);
complete_and_exit(&khubd_exited, 0);
pr_debug("%s: khubd exiting\n", usbcore_name);
return 0;
}
static struct usb_device_id hub_id_table [] = {
@ -2849,20 +2842,15 @@ static struct usb_driver hub_driver = {
int usb_hub_init(void)
{
pid_t pid;
if (usb_register(&hub_driver) < 0) {
printk(KERN_ERR "%s: can't register hub driver\n",
usbcore_name);
return -1;
}
pid = kernel_thread(hub_thread, NULL, CLONE_KERNEL);
if (pid >= 0) {
khubd_pid = pid;
khubd_task = kthread_run(hub_thread, NULL, "khubd");
if (!IS_ERR(khubd_task))
return 0;
}
/* Fall through if kernel_thread failed */
usb_deregister(&hub_driver);
@ -2873,12 +2861,7 @@ int usb_hub_init(void)
void usb_hub_cleanup(void)
{
int ret;
/* Kill the thread */
ret = kill_proc(khubd_pid, SIGKILL, 1);
wait_for_completion(&khubd_exited);
kthread_stop(khubd_task);
/*
* Hub resources are freed for us by usb_deregister. It calls
@ -2890,7 +2873,6 @@ void usb_hub_cleanup(void)
usb_deregister(&hub_driver);
} /* usb_hub_cleanup() */
static int config_descriptors_changed(struct usb_device *udev)
{
unsigned index;