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[IRDA]: stir4200, switching to the kthread API

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stir4200 uses a kernel thread for its TX/RX operations, and it is now
converted to the kernel kthread API.
Tested on an STIR4200 based dongle.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2006-05-25 16:20:19 -07:00 committed by David S. Miller
parent c6ae522e3a
commit bc1d6937e6
1 changed files with 14 additions and 24 deletions
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38
drivers/net/irda/stir4200.c
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@ -50,6 +50,7 @@
#include <linux/delay.h>
#include <linux/usb.h>
#include <linux/crc32.h>
#include <linux/kthread.h>
#include <net/irda/irda.h>
#include <net/irda/irlap.h>
#include <net/irda/irda_device.h>
@ -173,9 +174,7 @@ struct stir_cb {
struct qos_info qos;
unsigned speed; /* Current speed */
wait_queue_head_t thr_wait; /* transmit thread wakeup */
struct completion thr_exited;
pid_t thr_pid;
struct task_struct *thread; /* transmit thread */
struct sk_buff *tx_pending;
void *io_buf; /* transmit/receive buffer */
@ -577,7 +576,7 @@ static int stir_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
SKB_LINEAR_ASSERT(skb);
skb = xchg(&stir->tx_pending, skb);
wake_up(&stir->thr_wait);
wake_up_process(stir->thread);
/* this should never happen unless stop/wakeup problem */
if (unlikely(skb)) {
@ -753,13 +752,7 @@ static int stir_transmit_thread(void *arg)
struct net_device *dev = stir->netdev;
struct sk_buff *skb;
daemonize("%s", dev->name);
allow_signal(SIGTERM);
while (netif_running(dev)
&& netif_device_present(dev)
&& !signal_pending(current))
{
while (!kthread_should_stop()) {
#ifdef CONFIG_PM
/* if suspending, then power off and wait */
if (unlikely(freezing(current))) {
@ -813,10 +806,11 @@ static int stir_transmit_thread(void *arg)
}
/* sleep if nothing to send */
wait_event_interruptible(stir->thr_wait, stir->tx_pending);
}
set_current_state(TASK_INTERRUPTIBLE);
schedule();
complete_and_exit (&stir->thr_exited, 0);
}
return 0;
}
@ -859,7 +853,7 @@ static void stir_rcv_irq(struct urb *urb, struct pt_regs *regs)
warn("%s: usb receive submit error: %d",
stir->netdev->name, err);
stir->receiving = 0;
wake_up(&stir->thr_wait);
wake_up_process(stir->thread);
}
}
@ -928,10 +922,10 @@ static int stir_net_open(struct net_device *netdev)
}
/** Start kernel thread for transmit. */
stir->thr_pid = kernel_thread(stir_transmit_thread, stir,
CLONE_FS|CLONE_FILES);
if (stir->thr_pid < 0) {
err = stir->thr_pid;
stir->thread = kthread_run(stir_transmit_thread, stir,
"%s", stir->netdev->name);
if (IS_ERR(stir->thread)) {
err = PTR_ERR(stir->thread);
err("stir4200: unable to start kernel thread");
goto err_out6;
}
@ -968,8 +962,7 @@ static int stir_net_close(struct net_device *netdev)
netif_stop_queue(netdev);
/* Kill transmit thread */
kill_proc(stir->thr_pid, SIGTERM, 1);
wait_for_completion(&stir->thr_exited);
kthread_stop(stir->thread);
kfree(stir->fifo_status);
/* Mop up receive urb's */
@ -1084,9 +1077,6 @@ static int stir_probe(struct usb_interface *intf,
stir->qos.min_turn_time.bits &= qos_mtt_bits;
irda_qos_bits_to_value(&stir->qos);
init_completion (&stir->thr_exited);
init_waitqueue_head (&stir->thr_wait);
/* Override the network functions we need to use */
net->hard_start_xmit = stir_hard_xmit;
net->open = stir_net_open;