Re: kernel bug relating to networking

From: Daniel Baluta
Date: Mon May 16 2011 - 11:47:46 EST


On Mon, May 16, 2011 at 6:35 PM, James <bjlockie@xxxxxxxxx> wrote:
> I originally posted to linux-net@xxxxxxxxxxxxxxx but all that list

This should be netdev@xxxxxxxxxxxxxxxx

> received in the last day was 3 Russian (spam?) messages.
> I'm hoping here will be less spam.
>
> I'm having a wireless problem that I think is kernel issue.
> kernel-2.6.36.4 is good but recent kernels are bad.
> CompatWireless (recent wireless code) works on kernel-2.6.36.4 so I
> don't think it is the wireless subsystem..
>
> I have a Network controller: Atheros Communications Inc. AR5008 Wireless
> Network Adapter (rev 01).
>
> "iwlist wlan0 scan | grep SSID" under kernel-2.6.36.4 returns  ~15 APs
> and associates to my AP.
> Recent kernels are bad and return ~0-3 APs and do not associate to my AP.
>
> I need help to debug this.
>
> I think the scans fail whenever dmesg shows this:
>> ath: Failed to stop TX DMA in 100 msec after killing last frame
>> ath: Failed to stop TX DMA!
> It seems to be 100% if I boot a kernel and that message is there, it'll
> be a bad kernel.
>
> I tried:
> $ git clone
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6.37.y.git
> $ cd linux-2.6.37.y
> # git tag
> What tag is 2.6.36.4?
>
> v2.6.36
> v2.6.36-rc1
> v2.6.36-rc2
> v2.6.36-rc3
> v2.6.36-rc4
> v2.6.36-rc5
> v2.6.36-rc6
> v2.6.36-rc7
> v2.6.36-rc8
> v2.6.37
> v2.6.37-rc1
> v2.6.37-rc2
> v2.6.37-rc3
> v2.6.37-rc4
> v2.6.37-rc5
> v2.6.37-rc6
> v2.6.37-rc7
> v2.6.37-rc8
> v2.6.37.1
> v2.6.37.2
> v2.6.37.3
> v2.6.37.4
> v2.6.37.5
> v2.6.37.6
>
> Is the next step to do:
> $ git bisect start
> $ git bisect good v2.6.36.4
> $ git bisect bad v2.6.37.6
>
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