On Wed, 2010-08-25 at 11:42 -0700, Andrew Lutomirski wrote: > 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'. > It is an known issue as I mention. we are working on it and sorry for the delay. please take a look at commit 735df29a0641d9d8d65117c48ee460284ffcfc05 "Since it is possible happen very often and we do not want to fill the syslog, so don't enable the logging by default" Thanks Wey -- 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
