On Tue, Aug 10, 2010 at 7:05 PM, Guy, Wey-Yi <wey-yi.w.guy@xxxxxxxxx> wrote: > Hi Andrew, > > On Tue, 2010-08-10 at 14:39 -0700, Andrew Lutomirski wrote: >> On Mon, Jul 26, 2010 at 4:02 PM, Andrew Lutomirski <luto@xxxxxxx> wrote: >> > There's a regression in 2.6.35 where the connection breaks and iwlagn >> > writes a bunch of: >> > >> > iwlagn 0000:03:00.0: BA scd_flow 0 does not match txq_id 10 >> > >> > This is confirmed [1] and a patch supposedly exists. Since this >> > breaks at least two people's wireless and 2.6.35 is about to be >> > released, can we see the patches? >> > >> > Thanks, >> > Andy >> > >> > [1] http://article.gmane.org/gmane.linux.kernel.wireless.general/53552 >> > >> >> This regression was reported on July 21 and confirmed, supposedly with >> a patch available, on July 24 (or maybe July 23). On July 26 I pinged >> the list because I'm affected as well. >> >> It's now August 10 and both 2.6.35 and 2.5.35.1 have been released and >> the bug is still there. WTF happened? (I admit I haven't actually >> tested 2.6.35.1 because it's still compiling, but I see nothing to >> suggest that it's been fixed.) >> > > Sorry for the delay, the problem you report is a real problem in our > uCode; unfortunately, we still not root cause the real problem yet. The > patch I provide previous just a hack and still waiting for our internal > validation team to make sure it did not break the overall behaviors. > > I will submit the patch as soon as I got the report back from our test > team; at the meantime, we are very active work on root cause the real > problem. Once we have the possible solution, it will be great if you can > help us to verify it. In case this helps, I just captured the bug starting with iwlagn.debug=1 and with the following patch: diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c index 7d614c4..8583c42 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c @@ -1300,8 +1300,9 @@ void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, tid = ba_resp->tid; agg = &priv->stations[sta_id].tid[tid].agg; if (unlikely(agg->txq_id != scd_flow)) { - IWL_ERR(priv, "BA scd_flow %d does not match txq_id %d\n", - scd_flow, agg->txq_id); + IWL_ERR(priv, "BA scd_flow %d does not match txq_id %d (sta_id = %d, tid = %d)\n", + scd_flow, agg->txq_id, sta_id, tid); + // iwl_force_reset(priv, IWL_FW_RESET); return; } I've attached the dmesg. Search for 'BA'. --Andy
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