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path: root/drivers/char/ipmi/ipmi_si_intf.c
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Diffstat (limited to 'drivers/char/ipmi/ipmi_si_intf.c')
-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c85
1 files changed, 50 insertions, 35 deletions
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 35fbd4d8ed4..a86c0f29953 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -803,7 +803,7 @@ static int ipmi_thread(void *data)
set_user_nice(current, 19);
while (!kthread_should_stop()) {
spin_lock_irqsave(&(smi_info->si_lock), flags);
- smi_result=smi_event_handler(smi_info, 0);
+ smi_result = smi_event_handler(smi_info, 0);
spin_unlock_irqrestore(&(smi_info->si_lock), flags);
if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
/* do nothing */
@@ -972,10 +972,37 @@ static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs)
return si_irq_handler(irq, data, regs);
}
+static int smi_start_processing(void *send_info,
+ ipmi_smi_t intf)
+{
+ struct smi_info *new_smi = send_info;
+
+ new_smi->intf = intf;
+
+ /* Set up the timer that drives the interface. */
+ setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
+ new_smi->last_timeout_jiffies = jiffies;
+ mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
+
+ if (new_smi->si_type != SI_BT) {
+ new_smi->thread = kthread_run(ipmi_thread, new_smi,
+ "kipmi%d", new_smi->intf_num);
+ if (IS_ERR(new_smi->thread)) {
+ printk(KERN_NOTICE "ipmi_si_intf: Could not start"
+ " kernel thread due to error %ld, only using"
+ " timers to drive the interface\n",
+ PTR_ERR(new_smi->thread));
+ new_smi->thread = NULL;
+ }
+ }
+
+ return 0;
+}
static struct ipmi_smi_handlers handlers =
{
.owner = THIS_MODULE,
+ .start_processing = smi_start_processing,
.sender = sender,
.request_events = request_events,
.set_run_to_completion = set_run_to_completion,
@@ -987,7 +1014,7 @@ static struct ipmi_smi_handlers handlers =
#define SI_MAX_PARMS 4
static LIST_HEAD(smi_infos);
-static DECLARE_MUTEX(smi_infos_lock);
+static DEFINE_MUTEX(smi_infos_lock);
static int smi_num; /* Used to sequence the SMIs */
#define DEFAULT_REGSPACING 1
@@ -2162,9 +2189,13 @@ 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 != NULL && smi_info->thread != ERR_PTR(-ENOMEM))
- kthread_stop(smi_info->thread);
- del_timer_sync(&smi_info->si_timer);
+ if (smi_info->intf) {
+ /* The timer and thread are only running if the
+ interface has been started up and registered. */
+ if (smi_info->thread != NULL)
+ kthread_stop(smi_info->thread);
+ del_timer_sync(&smi_info->si_timer);
+ }
}
static struct ipmi_default_vals
@@ -2245,7 +2276,7 @@ static int try_smi_init(struct smi_info *new_smi)
new_smi->slave_addr, new_smi->irq);
}
- down(&smi_infos_lock);
+ mutex_lock(&smi_infos_lock);
if (!is_new_interface(new_smi)) {
printk(KERN_WARNING "ipmi_si: duplicate interface\n");
rv = -EBUSY;
@@ -2341,21 +2372,6 @@ static int try_smi_init(struct smi_info *new_smi)
if (new_smi->irq)
new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
- /* The ipmi_register_smi() code does some operations to
- determine the channel information, so we must be ready to
- handle operations before it is called. This means we have
- to stop the timer if we get an error after this point. */
- init_timer(&(new_smi->si_timer));
- new_smi->si_timer.data = (long) new_smi;
- new_smi->si_timer.function = smi_timeout;
- new_smi->last_timeout_jiffies = jiffies;
- new_smi->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
-
- add_timer(&(new_smi->si_timer));
- if (new_smi->si_type != SI_BT)
- new_smi->thread = kthread_run(ipmi_thread, new_smi,
- "kipmi%d", new_smi->intf_num);
-
if (!new_smi->dev) {
/* If we don't already have a device from something
* else (like PCI), then register a new one. */
@@ -2365,7 +2381,7 @@ static int try_smi_init(struct smi_info *new_smi)
printk(KERN_ERR
"ipmi_si_intf:"
" Unable to allocate platform device\n");
- goto out_err_stop_timer;
+ goto out_err;
}
new_smi->dev = &new_smi->pdev->dev;
new_smi->dev->driver = &ipmi_driver;
@@ -2377,7 +2393,7 @@ static int try_smi_init(struct smi_info *new_smi)
" Unable to register system interface device:"
" %d\n",
rv);
- goto out_err_stop_timer;
+ goto out_err;
}
new_smi->dev_registered = 1;
}
@@ -2386,8 +2402,7 @@ static int try_smi_init(struct smi_info *new_smi)
new_smi,
&new_smi->device_id,
new_smi->dev,
- new_smi->slave_addr,
- &(new_smi->intf));
+ new_smi->slave_addr);
if (rv) {
printk(KERN_ERR
"ipmi_si: Unable to register device: error %d\n",
@@ -2417,7 +2432,7 @@ static int try_smi_init(struct smi_info *new_smi)
list_add_tail(&new_smi->link, &smi_infos);
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
printk(" IPMI %s interface initialized\n",si_to_str[new_smi->si_type]);
@@ -2454,7 +2469,7 @@ static int try_smi_init(struct smi_info *new_smi)
kfree(new_smi);
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
return rv;
}
@@ -2512,26 +2527,26 @@ static __devinit int init_ipmi_si(void)
#endif
if (si_trydefaults) {
- down(&smi_infos_lock);
+ mutex_lock(&smi_infos_lock);
if (list_empty(&smi_infos)) {
/* No BMC was found, try defaults. */
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
default_find_bmc();
} else {
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
}
}
- down(&smi_infos_lock);
+ mutex_lock(&smi_infos_lock);
if (list_empty(&smi_infos)) {
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
#ifdef CONFIG_PCI
pci_unregister_driver(&ipmi_pci_driver);
#endif
printk("ipmi_si: Unable to find any System Interface(s)\n");
return -ENODEV;
} else {
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
return 0;
}
}
@@ -2607,10 +2622,10 @@ static __exit void cleanup_ipmi_si(void)
pci_unregister_driver(&ipmi_pci_driver);
#endif
- down(&smi_infos_lock);
+ mutex_lock(&smi_infos_lock);
list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
cleanup_one_si(e);
- up(&smi_infos_lock);
+ mutex_unlock(&smi_infos_lock);
driver_unregister(&ipmi_driver);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-14 21:40:55 +0000