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authorChristoph Hellwig <hch@lst.de>2006-05-25 16:20:19 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-17 21:26:20 -0700
commitbc1d6937e6cf4e81a5afeae2c9cf35ffb0905ba5 (patch)
treeb8cbfa60a9f296d24c0ca558906cd7457062bf97 /drivers/net/irda/stir4200.c
parentc6ae522e3a50fc1ec483d7f03ece9c7a25e6de95 (diff)
downloadlinux-2.6.34-ux500-bc1d6937e6cf4e81a5afeae2c9cf35ffb0905ba5.tar.gz
[IRDA]: stir4200, switching to the kthread API
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>
Diffstat (limited to 'drivers/net/irda/stir4200.c')
-rw-r--r--drivers/net/irda/stir4200.c38
1 files changed, 14 insertions, 24 deletions
diff --git a/drivers/net/irda/stir4200.c b/drivers/net/irda/stir4200.c
index 31867e4b891..d61b208b52a 100644
--- a/drivers/net/irda/stir4200.c
+++ b/drivers/net/irda/stir4200.c
@@ -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;