From: Dan Williams Date: Thu, 2 Aug 2007 15:32:25 +0000 (-0400) Subject: [PATCH] libertas: remove thread.h and make kthread usage clearer X-Git-Tag: v2.6.24-rc1~1454^2~637 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe3361507af44d00d5b42b91c1626321765a11bc;p=linux-2.6 [PATCH] libertas: remove thread.h and make kthread usage clearer Remove the thread.h abstractions and opencode kthread stuff to make it clearer. Signed-off-by: Dan Williams Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c index e0eab6e3a9..401a630ed4 100644 --- a/drivers/net/wireless/libertas/cmd.c +++ b/drivers/net/wireless/libertas/cmd.c @@ -1134,7 +1134,7 @@ int libertas_prepare_and_send_command(wlan_private * priv, lbs_deb_cmd("PREP_CMD: No free cmdnode\n"); /* Wake up main thread to execute next command */ - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); ret = -1; goto done; } @@ -1402,7 +1402,7 @@ int libertas_prepare_and_send_command(wlan_private * priv, libertas_queue_cmd(adapter, cmdnode, 1); adapter->nr_cmd_pending++; - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); if (wait_option & CMD_OPTION_WAITFORRSP) { lbs_deb_cmd("PREP_CMD: Wait for CMD response\n"); diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c index a206f49f81..9439005db4 100644 --- a/drivers/net/wireless/libertas/debugfs.c +++ b/drivers/net/wireless/libertas/debugfs.c @@ -432,7 +432,7 @@ static ssize_t libertas_lowrssi_read(struct file *file, char __user *userbuf, event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -496,7 +496,7 @@ static u16 libertas_get_events_bitmap(wlan_private *priv) event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -575,7 +575,7 @@ static ssize_t libertas_lowrssi_write(struct file *file, event->events = cpu_to_le16(event_bitmap); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -628,7 +628,7 @@ static ssize_t libertas_lowsnr_read(struct file *file, char __user *userbuf, event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -727,7 +727,7 @@ static ssize_t libertas_lowsnr_write(struct file *file, event->events = cpu_to_le16(event_bitmap); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -781,7 +781,7 @@ static ssize_t libertas_failcount_read(struct file *file, char __user *userbuf, event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -879,7 +879,7 @@ static ssize_t libertas_failcount_write(struct file *file, event->events = cpu_to_le16(event_bitmap); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -932,7 +932,7 @@ static ssize_t libertas_bcnmiss_read(struct file *file, char __user *userbuf, event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -1029,7 +1029,7 @@ static ssize_t libertas_bcnmiss_write(struct file *file, event->events = cpu_to_le16(event_bitmap); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -1082,7 +1082,7 @@ static ssize_t libertas_highrssi_read(struct file *file, char __user *userbuf, event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -1181,7 +1181,7 @@ static ssize_t libertas_highrssi_write(struct file *file, event->events = cpu_to_le16(event_bitmap); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -1232,7 +1232,7 @@ static ssize_t libertas_highsnr_read(struct file *file, char __user *userbuf, event->action = cpu_to_le16(CMD_ACT_GET); pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, @@ -1331,7 +1331,7 @@ static ssize_t libertas_highsnr_write(struct file *file, event->events = cpu_to_le16(event_bitmap); libertas_queue_cmd(adapter, pcmdnode, 1); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); /* Sleep until response is generated by FW */ wait_event_interruptible(pcmdnode->cmdwait_q, diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h index 184eee5485..c6fb703f66 100644 --- a/drivers/net/wireless/libertas/dev.h +++ b/drivers/net/wireless/libertas/dev.h @@ -14,7 +14,6 @@ #include "defs.h" #include "scan.h" -#include "thread.h" extern struct ethtool_ops libertas_ethtool_ops; @@ -146,7 +145,8 @@ struct _wlan_private { struct device *hotplug_device; /** thread to service interrupts */ - struct wlan_thread mainthread; + struct task_struct *main_thread; + wait_queue_head_t waitq; struct delayed_work assoc_work; struct workqueue_struct *assoc_thread; diff --git a/drivers/net/wireless/libertas/fw.c b/drivers/net/wireless/libertas/fw.c index 39b0a094b6..e7177598f9 100644 --- a/drivers/net/wireless/libertas/fw.c +++ b/drivers/net/wireless/libertas/fw.c @@ -341,7 +341,7 @@ static void command_timer_fn(unsigned long data) lbs_deb_fw("re-sending same command because of timeout\n"); libertas_queue_cmd(adapter, ptempnode, 0); - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); return; } diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c index cf522c6ef5..a3334f63a8 100644 --- a/drivers/net/wireless/libertas/if_usb.c +++ b/drivers/net/wireless/libertas/if_usb.c @@ -77,7 +77,7 @@ static void if_usb_write_bulk_callback(struct urb *urb) priv->dnld_sent = DNLD_RES_RECEIVED; /* Wake main thread if commands are pending */ if (!adapter->cur_cmd) - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); if ((adapter->connect_status == LIBERTAS_CONNECTED)) { netif_wake_queue(dev); netif_wake_queue(priv->mesh_dev); diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c index 2315eb6183..e24875de8d 100644 --- a/drivers/net/wireless/libertas/main.c +++ b/drivers/net/wireless/libertas/main.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include @@ -438,7 +439,7 @@ static void wlan_tx_timeout(struct net_device *dev) priv->adapter->eventcause = 0x01000000; libertas_send_tx_feedback(priv); } else - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); } else if (priv->adapter->connect_status == LIBERTAS_CONNECTED) { netif_wake_queue(priv->dev); netif_wake_queue(priv->mesh_dev); @@ -599,28 +600,25 @@ static void wlan_set_multicast_list(struct net_device *dev) * @param data A pointer to wlan_thread structure * @return 0 */ -static int wlan_service_main_thread(void *data) +static int libertas_thread(void *data) { - struct wlan_thread *thread = data; - wlan_private *priv = thread->priv; + struct net_device *dev = data; + wlan_private *priv = dev->priv; wlan_adapter *adapter = priv->adapter; wait_queue_t wait; u8 ireg = 0; lbs_deb_enter(LBS_DEB_THREAD); - wlan_activate_thread(thread); - init_waitqueue_entry(&wait, current); - set_freezable(); for (;;) { lbs_deb_thread( "main-thread 111: intcounter=%d " "currenttxskb=%p dnld_sent=%d\n", adapter->intcounter, adapter->currenttxskb, priv->dnld_sent); - add_wait_queue(&thread->waitq, &wait); + add_wait_queue(&priv->waitq, &wait); set_current_state(TASK_INTERRUPTIBLE); spin_lock_irq(&adapter->driver_lock); if ((adapter->psstate == PS_STATE_SLEEP) || @@ -643,7 +641,7 @@ static int wlan_service_main_thread(void *data) adapter->currenttxskb, priv->dnld_sent); set_current_state(TASK_RUNNING); - remove_wait_queue(&thread->waitq, &wait); + remove_wait_queue(&priv->waitq, &wait); try_to_freeze(); lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p " @@ -758,7 +756,6 @@ static int wlan_service_main_thread(void *data) del_timer(&adapter->command_timer); adapter->nr_cmd_pending = 0; wake_up_all(&adapter->cmd_pending); - wlan_deactivate_thread(thread); lbs_deb_leave(LBS_DEB_THREAD); return 0; @@ -841,10 +838,13 @@ int libertas_activate_card(wlan_private *priv, char *fw_name) lbs_deb_enter(LBS_DEB_MAIN); - lbs_deb_thread("Starting kthread...\n"); - priv->mainthread.priv = priv; - wlan_create_thread(wlan_service_main_thread, - &priv->mainthread, "wlan_main_service"); + lbs_deb_thread("Starting main thread...\n"); + init_waitqueue_head(&priv->waitq); + priv->main_thread = kthread_run(libertas_thread, dev, "libertas_main"); + if (IS_ERR(priv->main_thread)) { + lbs_deb_thread("Error creating main thread.\n"); + goto done; + } priv->assoc_thread = create_singlethread_workqueue("libertas_assoc"); @@ -884,8 +884,8 @@ err_init_fw: err_registerdev: destroy_workqueue(priv->assoc_thread); /* Stop the thread servicing the interrupts */ - wake_up_interruptible(&priv->mainthread.waitq); - wlan_terminate_thread(&priv->mainthread); + wake_up_interruptible(&priv->waitq); + kthread_stop(priv->main_thread); done: lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret); return ret; @@ -1017,7 +1017,7 @@ int libertas_remove_card(wlan_private *priv) adapter->surpriseremoved = 1; /* Stop the thread servicing the interrupts */ - wlan_terminate_thread(&priv->mainthread); + kthread_stop(priv->main_thread); libertas_debugfs_remove_one(priv); @@ -1151,7 +1151,7 @@ void libertas_interrupt(struct net_device *dev) netif_wake_queue(priv->mesh_dev); } - wake_up_interruptible(&priv->mainthread.waitq); + wake_up_interruptible(&priv->waitq); lbs_deb_leave(LBS_DEB_THREAD); } diff --git a/drivers/net/wireless/libertas/thread.h b/drivers/net/wireless/libertas/thread.h deleted file mode 100644 index b1f34d92ff..0000000000 --- a/drivers/net/wireless/libertas/thread.h +++ /dev/null @@ -1,52 +0,0 @@ -#ifndef __WLAN_THREAD_H_ -#define __WLAN_THREAD_H_ - -#include - -struct wlan_thread { - struct task_struct *task; - wait_queue_head_t waitq; - pid_t pid; - void *priv; -}; - -static inline void wlan_activate_thread(struct wlan_thread * thr) -{ - /** Record the thread pid */ - thr->pid = current->pid; - - /** Initialize the wait queue */ - init_waitqueue_head(&thr->waitq); -} - -static inline void wlan_deactivate_thread(struct wlan_thread * thr) -{ - lbs_deb_enter(LBS_DEB_THREAD); - - thr->pid = 0; - - lbs_deb_leave(LBS_DEB_THREAD); -} - -static inline void wlan_create_thread(int (*wlanfunc) (void *), - struct wlan_thread * thr, char *name) -{ - thr->task = kthread_run(wlanfunc, thr, "%s", name); -} - -static inline int wlan_terminate_thread(struct wlan_thread * thr) -{ - lbs_deb_enter(LBS_DEB_THREAD); - - /* Check if the thread is active or not */ - if (!thr->pid) { - printk(KERN_ERR "Thread does not exist\n"); - return -1; - } - kthread_stop(thr->task); - - lbs_deb_leave(LBS_DEB_THREAD); - return 0; -} - -#endif