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brcm80211: smac: decreased timer callback irq level 

Timer functions were called at soft-irq level, leading to the limitation
that mutexes could not be used. Lifted this limitation by migrating to
work queues.

Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Roland Vossen 2011-10-12 20:51:12 +02:00 committed by John W. Linville
parent be69c4ef46
commit 2a7fc5b1c1
2 changed files with 24 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
View File

@ -1409,18 +1409,22 @@ void brcms_down(struct brcms_info *wl)
/*
* precondition: perimeter lock is not acquired
*/
void brcms_timer(struct brcms_timer *t)
static void _brcms_timer(struct work_struct *work)
{
struct brcms_timer *t = container_of(work, struct brcms_timer,
dly_wrk.work);
spin_lock_bh(&t->wl->lock);
if (t->set) {
if (t->periodic) {
t->timer.expires = jiffies + t->ms * HZ / 1000;
atomic_inc(&t->wl->callbacks);
add_timer(&t->timer);
t->set = true;
} else
ieee80211_queue_delayed_work(t->wl->pub->ieee_hw,
&t->dly_wrk,
msecs_to_jiffies(t->ms));
} else {
t->set = false;
}
t->fn(t->arg);
}
@ -1430,14 +1434,6 @@ void brcms_timer(struct brcms_timer *t)
spin_unlock_bh(&t->wl->lock);
}
/*
* is called by the kernel from software irq context
*/
static void _brcms_timer(unsigned long data)
{
brcms_timer((struct brcms_timer *) data);
}
/*
* Adds a timer to the list. Caller supplies a timer function.
* Is called from wlc.
@ -1454,9 +1450,7 @@ struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
if (!t)
return NULL;
init_timer(&t->timer);
t->timer.data = (unsigned long) t;
t->timer.function = _brcms_timer;
INIT_DELAYED_WORK(&t->dly_wrk, _brcms_timer);
t->wl = wl;
t->fn = fn;
t->arg = arg;
@ -1478,22 +1472,22 @@ struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
*
* precondition: perimeter lock has been acquired
*/
void brcms_add_timer(struct brcms_timer *t, uint ms,
int periodic)
void brcms_add_timer(struct brcms_timer *t, uint ms, int periodic)
{
struct ieee80211_hw *hw = t->wl->pub->ieee_hw;
#ifdef BCMDBG
if (t->set)
wiphy_err(t->wl->wiphy, "%s: Already set. Name: %s, per %d\n",
wiphy_err(hw->wiphy, "%s: Already set. Name: %s, per %d\n",
__func__, t->name, periodic);
#endif
t->ms = ms;
t->periodic = (bool) periodic;
t->set = true;
t->timer.expires = jiffies + ms * HZ / 1000;
atomic_inc(&t->wl->callbacks);
add_timer(&t->timer);
ieee80211_queue_delayed_work(hw, &t->dly_wrk, msecs_to_jiffies(ms));
}
/*
@ -1505,7 +1499,7 @@ bool brcms_del_timer(struct brcms_timer *t)
{
if (t->set) {
t->set = false;
if (!del_timer(&t->timer))
if (!cancel_delayed_work(&t->dly_wrk))
return false;
atomic_dec(&t->wl->callbacks);

12
drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.h
View File

@ -19,6 +19,8 @@
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include "ucode_loader.h"
/*
* Starting index for 5G rates in the
@ -30,14 +32,14 @@
#define BRCMS_SET_SHORTSLOT_OVERRIDE 146
struct brcms_timer {
struct timer_list timer;
struct delayed_work dly_wrk;
struct brcms_info *wl;
void (*fn) (void *);
void *arg; /* argument to fn */
void (*fn) (void *); /* function called upon expiration */
void *arg; /* fixed argument provided to called function */
uint ms;
bool periodic;
bool set;
struct brcms_timer *next;
bool set; /* indicates if timer is active */
struct brcms_timer *next; /* for freeing on unload */
#ifdef BCMDBG
char *name; /* Description of the timer */
#endif