linux-kernel - Re: carl9170 disconnects under load

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Message-ID: <20101101101012.GB3391@pma.sysgo.com>
Date:	Mon, 1 Nov 2010 11:10:12 +0100
From:	Pavel Machek <pma@...go.com>
To:	kernel list <linux-kernel@...r.kernel.org>,
	chunkeey@...glemail.com, linux-wireless@...r.kernel.org
Subject: Re: carl9170 disconnects under load

On Mon 2010-11-01 10:46:49, Pavel Machek wrote:
> Hi!
> 
> > > I'm testing driver from -wireless testing, cca 2.6.26-rc7.
> > > 
> > > It seems to work (up to 802.11n speeds -- I've seen iwconfig claiming
> > > 121 MB/sec), but disconnects rather quickly when under load:
> > > 
> > > telnet 192.168.1.3 chargen > /dev/null
> > > 
> > > The machine is powerpc mpc5200b board, with OHCI driver -- it is not
> > > capable of USB2.0 speeds.
> > 
> > So I tried with different AP, one not capable of 802.11n speeds. It
> > fails in different way :-(. But this one is with my backport to
> > 2.6.34...
> 
> But it fails with wireless-testing tree, too :-(.
> 
> Linux mpc5200b 2.6.36-rc8-wl-pma-48197-gdcae733-dirty #43 Tue Oct 26
>  12:06:21 CEST 2010 ppc

It works "better" if I force AP to 1Mbps.... (Note that I have USB1.1
host only).
								Pavel

Registered led device: carl9170-phy1::assoc
usb 1-1: Atheros AR9170 is registered as 'phy1'
ieee80211 phy1: device now idle
ieee80211 phy1: device no longer idle - scanning
wlan0: authenticate with 00:11:95:05:30:d7 (try 1)
wlan0: authenticated
ieee80211 phy1: device now idle
ieee80211 phy1: device no longer idle - working
wlan0: associate with 00:11:95:05:30:d7 (try 1)
wlan0: RX AssocResp from 00:11:95:05:30:d7 (capab=0x421 status=0
aid=1)
wlan0: associated
ieee80211 phy1: Allocated STA 00:11:95:05:30:d7
ieee80211 phy1: Inserted STA 00:11:95:05:30:d7
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
ieee80211 phy1: FW: MAC RESET
-/bin/sh-3.00# 


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