From e9a705a0a0ed99833cfef40d509f63a052638f00 Mon Sep 17 00:00:00 2001 From: Matt Domsch Date: Mon, 7 Nov 2005 01:00:04 -0800 Subject: [PATCH] [PATCH] ipmi: use kthread API Convert ipmi driver thread to kthread API, only sleep when interface is idle. Signed-off-by: Matt Domsch Cc: Corey Minyard Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/ipmi/ipmi_si_intf.c | 45 ++++++++++++++-------------------------- 1 file changed, 15 insertions(+), 30 deletions(-) diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index fa3be62..ea89dca 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -52,6 +52,7 @@ #include #include #include +#include #include #ifdef CONFIG_HIGH_RES_TIMERS #include @@ -222,8 +223,7 @@ struct smi_info unsigned long watchdog_pretimeouts; unsigned long incoming_messages; - struct completion exiting; - long thread_pid; + struct task_struct *thread; }; static struct notifier_block *xaction_notifier_list; @@ -785,31 +785,22 @@ static void set_run_to_completion(void *send_info, int i_run_to_completion) static int ipmi_thread(void *data) { struct smi_info *smi_info = data; - unsigned long flags, last=1; + unsigned long flags; enum si_sm_result smi_result; - daemonize("kipmi%d", smi_info->intf_num); - allow_signal(SIGKILL); set_user_nice(current, 19); - while (!atomic_read(&smi_info->stop_operation)) { - schedule_timeout(last); + while (!kthread_should_stop()) { spin_lock_irqsave(&(smi_info->si_lock), flags); smi_result=smi_event_handler(smi_info, 0); spin_unlock_irqrestore(&(smi_info->si_lock), flags); - if (smi_result == SI_SM_CALL_WITHOUT_DELAY) - last = 0; - else if (smi_result == SI_SM_CALL_WITH_DELAY) { - udelay(1); - last = 0; - } - else { - /* System is idle; go to sleep */ - last = 1; - current->state = TASK_INTERRUPTIBLE; + if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { + /* do nothing */ } + else if (smi_result == SI_SM_CALL_WITH_DELAY) + udelay(1); + else + schedule_timeout_interruptible(1); } - smi_info->thread_pid = 0; - complete_and_exit(&(smi_info->exiting), 0); return 0; } @@ -2212,11 +2203,8 @@ static void setup_xaction_handlers(struct smi_info *smi_info) static inline void wait_for_timer_and_thread(struct smi_info *smi_info) { - if (smi_info->thread_pid > 0) { - /* wake the potentially sleeping thread */ - kill_proc(smi_info->thread_pid, SIGKILL, 0); - wait_for_completion(&(smi_info->exiting)); - } + if (smi_info->thread != ERR_PTR(-ENOMEM)) + kthread_stop(smi_info->thread); del_timer_sync(&smi_info->si_timer); } @@ -2348,12 +2336,9 @@ static int init_one_smi(int intf_num, struct smi_info **smi) new_smi->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; add_timer(&(new_smi->si_timer)); - if (new_smi->si_type != SI_BT) { - init_completion(&(new_smi->exiting)); - new_smi->thread_pid = kernel_thread(ipmi_thread, new_smi, - CLONE_FS|CLONE_FILES| - CLONE_SIGHAND); - } + if (new_smi->si_type != SI_BT) + new_smi->thread = kthread_run(ipmi_thread, new_smi, + "kipmi%d", new_smi->intf_num); rv = ipmi_register_smi(&handlers, new_smi, -- 2.7.4