linux-kernel - Re: ath5k gets lost with eeepc-laptop removal

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Date:	Fri, 31 Oct 2008 13:51:49 +0000
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
CC:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	willy@...ux.intel.com, lrodriguez@...eros.com,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: ath5k gets lost with eeepc-laptop removal

Luiz Fernando N. Capitulino wrote:
>  Hi guys,
> 
>  If I do a 'rmmod eeepc-laptop', while connected to my AP, I get the
> following error messages from ath5k:
> 
> """
> ath5k phy0: noise floor calibration timeout (2417MHz)
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: can't reset hardware (-5)
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: can't reset hardware (-5)
> wlan0: No ProbeResp from current AP 00:1d:0f:e9:c7:c0 - assume out of range
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: ath5k_chan_set: unable to reset channel (2412 Mhz)
> wlan0: failed to set freq to 2412 MHz for scan
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: ath5k_chan_set: unable to reset channel (2417 Mhz)
> wlan0: failed to set freq to 2417 MHz for scan
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: ath5k_chan_set: unable to reset channel (2422 Mhz)
> wlan0: failed to set freq to 2422 MHz for scan
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: ath5k_chan_set: unable to reset channel (2427 Mhz)
> wlan0: failed to set freq to 2427 MHz for scan
> ath5k phy0: failed to wakeup the MAC Chip
> ath5k phy0: ath5k_chan_set: unable to reset channel (2432 Mhz)
> wlan0: failed to set freq to 2432 MHz for scan
> wlan0: failed to set freq to 2437 MHz for scan
> wlan0: failed to set freq to 2442 MHz for scan
> wlan0: failed to set freq to 2447 MHz for scan
> wlan0: failed to set freq to 2452 MHz for scan
> wlan0: failed to set freq to 2457 MHz for scan
> wlan0: failed to set freq to 2462 MHz for scan
> wlan0: failed to set freq to 2467 MHz for scan
> wlan0: failed to set freq to 2472 MHz for scan
> wlan0: failed to set freq to 2484 MHz for scan
> wlan0: failed to restore operational channel after scan
> wlan0: authenticate with AP 00:1d:0f:e9:c7:c0
> wlan0: authenticate with AP 00:1d:0f:e9:c7:c0
> wlan0: authenticate with AP 00:1d:0f:e9:c7:c0
> wlan0: authentication with AP 00:1d:0f:e9:c7:c0 timed out
> """
> 
>  Then I lost my wireless connection.
> 
>  I'm running latest Linus git tree (2.6.28-rc2) on a Eeepc 701.
> 
>  The problem doesn't happen on 2.6.27.4, but as 2.6.28-rc1 doesn't
> boot on this machine, it would be a bit difficult to bisect it.
> 
>  Thanks.
> 

The trick with bisection is to identify the fix, use "git cherry-pick" to apply it before testing, and then "git reset --hard HEAD^" to unapply the fix before "git bisect {good|bad}".

But you shouldn't need to bisect.  It'll be the addition of rfkill support (see below).

Matthew: I nagged you twice about different consequences of this commit, so here's a third :).  You said rfkill no longer automatically frobs on suspend/resume, which was what I was worried about last time.  Should the core code also  be modified so it doesn't do anything when the rfkill device is unregistered?

Thanks
Alan

---

commit a195dcdcff33b8ef01a23cbc489fdfcdfa28c88e
Author: Matthew Garrett <mjg59@...f.ucam.org>
Date:   Tue Aug 19 12:13:20 2008 +0100

    eeepc-laptop: Use standard interfaces

    eeepc-laptop currently only sends key events via ACPI and has
    non-standard rfkill control. Add an input device and use the rfkill
    infrastructure.

    Signed-off-by: Matthew Garrett <mjg@...hat.com>
    Signed-off-by: Len Brown <len.brown@...el.com>
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