[PATCH 01/14] staging: brcm80211: use wait queues instead of semaphores in wl_cfg80211.c

[Franky Lin]

On 08/12/2011 09:44 AM, Arend van Spriel wrote:
> On 08/12/2011 04:07 PM, Rafał Miłecki wrote:
>> 2011/8/12 Arend van Spriel<arend at broadcom.com>:
>>> @@ -3537,27 +3544,39 @@ static s32 brcmf_event_handler(void *data)
>>>                          (struct brcmf_cfg80211_priv *)data;
>>>          struct sched_param param = {.sched_priority = MAX_RT_PRIO - 1 };
>>>          struct brcmf_cfg80211_event_q *e;
>>> +       DECLARE_WAITQUEUE(wait, current);
>>>
>>>          sched_setscheduler(current, SCHED_FIFO,&param);
>>>          allow_signal(SIGTERM);
>>> -       while (likely(!down_interruptible(&cfg_priv->event_sync))) {
>>> +       add_wait_queue(&cfg_priv->event_waitq,&wait);
>>> +       while (1) {
>>> +               prepare_to_wait(&cfg_priv->event_waitq,&wait,
>>> +                               TASK_INTERRUPTIBLE);
>>> +
>>> +               schedule();
>>> +
>>>                  if (kthread_should_stop())
>>>                          break;
>>> +
>>>                  e = brcmf_deq_event(cfg_priv);
>>>                  if (unlikely(!e)) {
>>>                          WL_ERR("event queue empty...\n");
>>> -                       BUG();
>>> +                       continue;
>>>                  }
>>> -               WL_INFO("event type (%d)\n", e->etype);
>>> -               if (cfg_priv->el.handler[e->etype])
>>> -                       cfg_priv->el.handler[e->etype](cfg_priv,
>>> -                                                      cfg_to_ndev(cfg_priv),
>>> -&e->emsg, e->edata);
>>> -               else
>>> -                       WL_INFO("Unknown Event (%d): ignoring\n", e->etype);
>>>
>>> -               brcmf_put_event(e);
>>> +               do {
>>> +                       WL_INFO("event type (%d)\n", e->etype);
>>> +                       if (cfg_priv->el.handler[e->etype])
>>> +                               cfg_priv->el.handler[e->etype](cfg_priv,
>>> +                                       cfg_to_ndev(cfg_priv),
>>> +&e->emsg, e->edata);
>>> +                       else
>>> +                               WL_INFO("Unknown Event (%d): ignoring\n",
>>> +                                       e->etype);
>>> +                       brcmf_put_event(e);
>>> +               } while ((e = brcmf_deq_event(cfg_priv)));
>> if (((((care_coding_style)))))
>> fix();
>>
>> :-)
>>
>
> I assume you refer to the indents above. Not sure what exactly happened
> there, but the patch email as I received it looks. Could it be a mail
> reader issue?

Hi Rafał,

If you are refering to this line
 >>> +               } while ((e = brcmf_deq_event(cfg_priv)));

The extra parentheses are added to fix a compiler warning:
	drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c: In function 
‘brcmf_event_handler’:
	drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c:3576: warning: suggest 
parentheses around assignment used as truth value

Thanks
Franky