Hi John,
Please apply this to wireless-dev.
--
This patch makes sleeping in the hw->config callback possible
by removing the only atomic caller. The atomic caller was
a timer and is replaced by a workqueue.
In general, allowing to sleep in the config callback is a
good thing. bcm43xx must be able to sleep here, as it is
required to lock a mutex.
But there are other good reasons to sleep here. We might
want to sleep for a grace period on channel switch, for example.
Signed-off-by: Michael Buesch <[EMAIL PROTECTED]>
Index: wireless-dev-dscapeports/net/d80211/ieee80211.c
===================================================================
--- wireless-dev-dscapeports.orig/net/d80211/ieee80211.c 2006-06-17
21:26:10.000000000 +0200
+++ wireless-dev-dscapeports/net/d80211/ieee80211.c 2006-07-09
20:01:42.000000000 +0200
@@ -4327,8 +4327,7 @@
del_timer_sync(&local->rate_limit_timer);
if (local->stat_time)
del_timer_sync(&local->stat_timer);
- if (local->scan_timer.data)
- del_timer_sync(&local->scan_timer);
+ cancel_rearming_delayed_work(&local->scan_work);
ieee80211_rx_bss_list_deinit(dev);
rtnl_lock();
Index: wireless-dev-dscapeports/net/d80211/ieee80211_i.h
===================================================================
--- wireless-dev-dscapeports.orig/net/d80211/ieee80211_i.h 2006-06-17
21:26:10.000000000 +0200
+++ wireless-dev-dscapeports/net/d80211/ieee80211_i.h 2006-07-09
19:52:07.000000000 +0200
@@ -17,6 +17,7 @@
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+#include <linux/workqueue.h>
#include "ieee80211_key.h"
#include "sta_info.h"
@@ -407,7 +408,7 @@
int scan_channel_idx;
enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
unsigned long last_scan_completed;
- struct timer_list scan_timer;
+ struct work_struct scan_work;
int scan_oper_channel;
int scan_oper_channel_val;
int scan_oper_power_level;
Index: wireless-dev-dscapeports/net/d80211/ieee80211_iface.c
===================================================================
--- wireless-dev-dscapeports.orig/net/d80211/ieee80211_iface.c 2006-06-17
21:26:10.000000000 +0200
+++ wireless-dev-dscapeports/net/d80211/ieee80211_iface.c 2006-07-09
20:03:32.000000000 +0200
@@ -271,8 +271,8 @@
case IEEE80211_IF_TYPE_STA:
case IEEE80211_IF_TYPE_IBSS:
del_timer_sync(&sdata->u.sta.timer);
- if (local->scan_timer.data == (unsigned long) sdata->dev)
- del_timer_sync(&local->scan_timer);
+ if (local->scan_work.data == sdata->dev)
+ cancel_rearming_delayed_work(&local->scan_work);
kfree(sdata->u.sta.extra_ie);
sdata->u.sta.extra_ie = NULL;
kfree(sdata->u.sta.assocreq_ies);
Index: wireless-dev-dscapeports/net/d80211/ieee80211_sta.c
===================================================================
--- wireless-dev-dscapeports.orig/net/d80211/ieee80211_sta.c 2006-06-17
21:26:10.000000000 +0200
+++ wireless-dev-dscapeports/net/d80211/ieee80211_sta.c 2006-07-09
20:21:44.000000000 +0200
@@ -2422,15 +2422,16 @@
}
-static void ieee80211_sta_scan_timer(unsigned long ptr)
+static void ieee80211_sta_scan_work(void *_data)
{
- struct net_device *dev = (struct net_device *) ptr;
+ struct net_device *dev = _data;
struct ieee80211_local *local = dev->ieee80211_ptr;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_hw_modes *mode;
struct ieee80211_channel *chan;
int skip;
union iwreq_data wrqu;
+ unsigned long next_delay = 0;
if (!local->sta_scanning)
return;
@@ -2498,29 +2499,27 @@
local->scan_channel_idx = 0;
}
- if (skip) {
- local->scan_timer.expires = jiffies;
+ if (skip)
break;
- }
- local->scan_timer.expires = jiffies + IEEE80211_PROBE_DELAY;
+ next_delay = IEEE80211_PROBE_DELAY;
local->scan_state = SCAN_SEND_PROBE;
break;
case SCAN_SEND_PROBE:
if (ieee80211_active_scan(local)) {
ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
local->scan_ssid_len);
- local->scan_timer.expires =
- jiffies + IEEE80211_CHANNEL_TIME;
- } else {
- local->scan_timer.expires =
- jiffies + IEEE80211_PASSIVE_CHANNEL_TIME;
- }
+ next_delay = IEEE80211_CHANNEL_TIME;
+ } else
+ next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
local->scan_state = SCAN_SET_CHANNEL;
break;
}
- add_timer(&local->scan_timer);
+ if (next_delay)
+ schedule_delayed_work(&local->scan_work, next_delay);
+ else
+ schedule_work(&local->scan_work);
}
@@ -2569,11 +2568,8 @@
local->scan_state = SCAN_SET_CHANNEL;
local->scan_hw_mode_idx = 0;
local->scan_channel_idx = 0;
- init_timer(&local->scan_timer);
- local->scan_timer.data = (unsigned long) dev;
- local->scan_timer.function = ieee80211_sta_scan_timer;
- local->scan_timer.expires = jiffies + 1;
- add_timer(&local->scan_timer);
+ INIT_WORK(&local->scan_work, ieee80211_sta_scan_work, dev);
+ schedule_work(&local->scan_work);
return 0;
}
--
Greetings Michael.
-
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