linux-kernel - Re: carl9170 disconnects under load

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Date:	Mon, 1 Nov 2010 13:11:59 +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

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).

Ok, so I tried on powerpc machine with usb2.0... it worked a bit
better, but after a reboot, I got this one:

usb 1-3: Atheros AR9170 is registered as 'phy0'
kjournald starting.  Commit interval 5 seconds
EXT3-fs (sda3): warning: maximal mount count reached, running e2fsck
is recommended
EXT3-fs (sda3): using internal journal
EXT3-fs (sda3): recovery complete
EXT3-fs (sda3): mounted filesystem with writeback data mode
warning: `proftpd' uses 32-bit capabilities (legacy support in use)
PHY: f0003000:01 - Link is Up - 100/Full
mpc5xxx_can f0000900.can: setting BTR0=0x07 BTR1=0x1c
FW: MAC RESET
wlan0: authenticate with 00:11:95:05:30:d7 (try 1)
wlan0: authenticated
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
usb 1-3: no command feedback received (-110).
carl9170 cmd: 08 01 00 00 f0 36 1c 00 00 24 00 00
.....6...$..
usb 1-3: restart device (6)
writing reg 0x1c36f0 (val 0x2400) failed (-110)
lost 3 command responses/traps! w:13 g:0
writing reg 0x1d0104 (val 0x3) failed (-110)
usb 1-3: kill pending tx urbs.
usb 1-3: firmware upload failed (-110).
usb 1-3: stuck tx urbs!
usb 1-3: Failed to restart device  (-110).
writing reg 0x1c36f0 (val 0x2400) failed (-5)
writing reg 0x1c36f0 (val 0x2400) failed (-5)
writing reg 0x1c36f0 (val 0x5000) failed (-5)
wlan0: deauthenticating from 00:11:95:05:30:d7 by local choice
(reason=3)
usb 1-3: reset high speed USB device using ehci_hcd and address 3
cfg80211: Calling CRDA to update world regulatory domain
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