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mac80211: allow out-of-band EOSP notification

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iwlwifi has a separate EOSP notification from
the device, and to make use of that properly
it needs to be passed to mac80211. To be able
to mix with tx_status_irqsafe and rx_irqsafe
it also needs to be an "_irqsafe" version in
the sense that it goes through the tasklet,
the actual flag clearing would be IRQ-safe
but doing it directly would cause reordering
issues.

This is needed in the case of a P2P GO going
into an absence period without transmitting
any frames that should be driver-released as
in this case there's no other way to inform
mac80211 that the service period ended. Note
that for drivers that don't use the _irqsafe
functions another version of this function
will be required.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2011-09-29 16:04:39 +02:00
committed by John W. Linville
parent 40b9640883
commit 37fbd90800
5 changed files with 88 additions and 2 deletions
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25
net/mac80211/sta_info.c
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@@ -1478,6 +1478,31 @@ void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
}
EXPORT_SYMBOL(ieee80211_sta_block_awake);
void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
struct ieee80211_local *local = sta->local;
struct sk_buff *skb;
struct skb_eosp_msg_data *data;
trace_api_eosp(local, pubsta);
skb = alloc_skb(0, GFP_ATOMIC);
if (!skb) {
/* too bad ... but race is better than loss */
clear_sta_flag(sta, WLAN_STA_SP);
return;
}
data = (void *)skb->cb;
memcpy(data->sta, pubsta->addr, ETH_ALEN);
memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN);
skb->pkt_type = IEEE80211_EOSP_MSG;
skb_queue_tail(&local->skb_queue, skb);
tasklet_schedule(&local->tasklet);
}
EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe);
void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
u8 tid, bool buffered)
{