Commit e9a705a0 authored by Matt Domsch's avatar Matt Domsch Committed by Linus Torvalds
Browse files

[PATCH] ipmi: use kthread API



Convert ipmi driver thread to kthread API, only sleep when interface is
idle.
Signed-off-by: default avatarMatt Domsch <Matt_Domsch@dell.com>
Cc: Corey Minyard <minyard@acm.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a9a2c44f
......@@ -52,6 +52,7 @@
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/notifier.h>
#include <linux/kthread.h>
#include <asm/irq.h>
#ifdef CONFIG_HIGH_RES_TIMERS
#include <linux/hrtime.h>
......@@ -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,
......
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