From: Michael Wu <flamingice@xxxxxxxxxxxx>
This prevents data frames from being queued on the master device if it is
in the midst of a scan. It also makes both master and virtual interfaces
properly set trans_start when frames are sent so the network watchdog does
not try to reset the interfaces. tx_queue_len is left as the default on
virtual interfaces to allow frames to be queued while the device is
scanning.
Signed-off-by: Michael Wu <flamingice@xxxxxxxxxxxx>
---
net/mac80211/ieee80211.c | 5 +++--
net/mac80211/ieee80211_sta.c | 23 ++++++++++++++++++-----
2 files changed, 21 insertions(+), 7 deletions(-)
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index a0879ba..967df9c 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -1148,6 +1148,7 @@ static int __ieee80211_tx(struct ieee802
ret = local->ops->tx(local_to_hw(local), skb, control);
if (ret)
return IEEE80211_TX_AGAIN;
+ local->mdev->trans_start = jiffies;
ieee80211_led_tx(local, 1);
}
if (tx->u.tx.extra_frag) {
@@ -1178,6 +1179,7 @@ static int __ieee80211_tx(struct ieee802
control);
if (ret)
return IEEE80211_TX_FRAG_AGAIN;
+ local->mdev->trans_start = jiffies;
ieee80211_led_tx(local, 1);
tx->u.tx.extra_frag[i] = NULL;
}
@@ -1588,6 +1590,7 @@ static int ieee80211_subif_start_xmit(st
skb->nh.raw = skb->data + nh_pos;
skb->h.raw = skb->data + h_pos;
+ dev->trans_start = jiffies;
dev_queue_xmit(skb);
return 0;
@@ -4433,7 +4436,6 @@ void ieee80211_if_setup(struct net_devic
dev->get_stats = ieee80211_get_stats;
dev->open = ieee80211_open;
dev->stop = ieee80211_stop;
- dev->tx_queue_len = 0;
dev->uninit = ieee80211_if_reinit;
dev->destructor = ieee80211_if_free;
}
@@ -4448,7 +4450,6 @@ void ieee80211_if_mgmt_setup(struct net_
dev->stop = ieee80211_mgmt_stop;
dev->type = ARPHRD_IEEE80211_PRISM;
dev->hard_header_parse = header_parse_80211;
- dev->tx_queue_len = 0;
dev->uninit = ieee80211_if_reinit;
dev->destructor = ieee80211_if_free;
}
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 9d08a37..280b24f 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -2527,7 +2527,7 @@ void ieee80211_scan_completed(struct iee
{
struct ieee80211_local *local = hw_to_local(hw);
struct net_device *dev = local->scan_dev;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_sub_if_data *sdata;
union iwreq_data wrqu;
printk(KERN_DEBUG "%s: scan completed\n", dev->name);
@@ -2542,15 +2542,23 @@ void ieee80211_scan_completed(struct iee
memset(&wrqu, 0, sizeof(wrqu));
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
+ spin_lock_bh(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list) {
+ netif_wake_queue(sdata->dev);
+
+ if (sdata->type == IEEE80211_IF_TYPE_STA)
+ ieee80211_sta_timer((unsigned long)&sdata->u.sta);
+ }
+ spin_unlock_bh(&local->sub_if_lock);
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
if (!ifsta->bssid_set ||
(!ifsta->state == IEEE80211_IBSS_JOINED &&
!ieee80211_sta_active_ibss(dev)))
ieee80211_sta_find_ibss(dev, ifsta);
- /* TODO: need to wake every sta interface */
- } else if (sdata->type == IEEE80211_IF_TYPE_STA)
- ieee80211_sta_timer((unsigned long)&sdata->u.sta);
+ }
}
EXPORT_SYMBOL(ieee80211_scan_completed);
@@ -2637,6 +2645,7 @@ static int ieee80211_sta_start_scan(stru
u8 *ssid, size_t ssid_len)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_sub_if_data *sdata;
if (ssid_len > IEEE80211_MAX_SSID_LEN)
return -EINVAL;
@@ -2680,7 +2689,11 @@ static int ieee80211_sta_start_scan(stru
}
local->sta_scanning = 1;
- /* TODO: stop TX queue? */
+
+ spin_lock_bh(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list)
+ netif_stop_queue(sdata->dev);
+ spin_unlock_bh(&local->sub_if_lock);
if (ssid) {
local->scan_ssid_len = ssid_len;
-
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