On Fri, Jan 09, 2009 at 02:10:50PM +0000, Hugh Dickins wrote: > Good, that should be a lot quicker. Well I got a lockup doing that, I'll try again later but anyway I see the bug already, read on if interested. I should have a patch shortly. ath5k_tasklet_rx creates a new skb for every packet that is handed to the upper layers, and the buffer is moved to the end of the rxbuf list. But ath5k_rxbuf_setup fails skb_alloc so the buffer is left in the rxbuf list with a null skb. Once another 40 packets are processed that buffer comes up again and triggers the BUG_ON. Disabling the BUG_ON is bad because we could end up with no available buffers. The fix would be to create a new skb when we accept a packet, and just drop the packet if that skb creation fails. Then swap in the new skb after ieee80211_rx. ath9k already does something like this. -- Bob Copeland %% www.bobcopeland.com -- 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
