On amd64, the `ieee80211_tx_info' struct takes 56 bytes, thus cannot fit
into skb's control buffer.
The very first result is that nothing can be really sent out, because
skb's next member `len' also gets cleared when doing:
info = IEEE80211_SKB_CB(skb);
memset(info, 0, sizeof(*info));
A quick fix may be removing the TX control's sta pointer, since IMHO
it's rarely used for now (the only place that I found was a function
assigning values to it).
It has been working well for me so far, but please let me know if
there're better solutions. Thanks!
Best regards,
Gao Lei
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index e3adf99..b9a5ae7 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -331,7 +331,6 @@ struct ieee80211_tx_info {
struct {
struct ieee80211_vif *vif;
struct ieee80211_key_conf *hw_key;
- struct ieee80211_sta *sta;
unsigned long jiffies;
int ifindex;
u16 aid;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 7d1b32c..ee0ed32 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -540,9 +540,6 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
sband = tx->local->hw.wiphy->bands[tx->channel->band];
- if (tx->sta)
- info->control.sta = &tx->sta->sta;
-
if (!info->control.retry_limit) {
if (!is_multicast_ether_addr(hdr->addr1)) {
int len = min_t(int, tx->skb->len + FCS_LEN,
@@ -620,9 +617,6 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
info->control.rts_cts_rate_idx = 0;
}
- if (tx->sta)
- info->control.sta = &tx->sta->sta;
-
return TX_CONTINUE;
}
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