On Wed, 2015-05-13 at 09:16 +0000, Michal Kazior wrote: > Some splats I was seeing: > > (a) WARNING: CPU: 1 PID: 0 at /devel/src/linux/net/mac80211/wep.c:102 ieee80211_wep_add_iv > (b) WARNING: CPU: 1 PID: 0 at /devel/src/linux/net/mac80211/wpa.c:73 ieee80211_tx_h_michael_mic_add > (c) WARNING: CPU: 3 PID: 0 at /devel/src/linux/net/mac80211/wpa.c:433 ieee80211_crypto_ccmp_encrypt > > I've seen (a) and (b) with ath9k hw crypto and (c) > with ath9k sw crypto. All of them were related to > insufficient skb tailroom and I was able to > trigger these with ping6 program. > > AP_VLANs may inherit crypto keys from parent AP. > This wasn't considered and yielded problems in > some setups resulting in inability to transmit > data because mac80211 wouldn't resize skbs when > necessary and subsequently drop some packets due > to insufficient tailroom. > > For efficiency purposes don't inspect both AP_VLAN > and AP sdata looking for tailroom counter. Instead > update AP_VLAN tailroom counters whenever their > master AP tailroom counter changes. Applied. johannes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
