Anyone else see host machine lockups?

Ben Greear greearb at
Tue Apr 22 07:44:40 PDT 2014

On 04/21/2014 11:53 PM, Michal Kazior wrote:
> On 18 April 2014 22:09, Ben Greear <greearb at> wrote:
>> We can reliably lock up a host system (no splats, no mention of
>> firmware crashes, system just dies) when we bring up or down a
>> bunch of vifs in a system with 3 radios in a PC.
>> Anyone else seeing similar?
>>From what I understand this seems to be faulty CUS hardware design.
> The problem occurs when trying to perform cold reset on target device
> which sometimes leads to voltage drops/spikes which in turn breaks
> PCI-E link. Some host controllers apparently can't deal with it and
> hang the whole machine (e.g. Thinkpad T430), while others just lose
> connectivity with the device and need re-plugging (e.g. Dell E6420) or
> display a splat and need to be restarted before given PCI-E slot can
> be used again (e.g. AP135's "Data bus error").

I see this on WLE900VX NICs as well, so it's not just a CUS issue.

And, I don't think it is just cold-reset, because I do not see any
console messages about attempting a cold reset.


> Michal

Ben Greear <greearb at>
Candela Technologies Inc

More information about the ath10k mailing list