[3.10 regression] mei endless recursion

[3.10 regression] mei endless recursion

[Stanislaw Gruszka]

Hi

We have a bug report when system fail to boot on 3.10 . It happens due to
problem in mei which do endless calls:

mei_reset -> mei_hbm_start_req -> mei_reset -> mei_hbm_start_req -> ...

It did not happen on 3.9.

Report is here:
https://bugzilla.redhat.com/show_bug.cgi?id=991571

Stanislaw

RE: [3.10 regression] mei endless recursion

[Winkler, Tomas]

> -----Original Message-----
> From: Stanislaw Gruszka [mailto:sgruszka@redhat.com]
> Sent: Tuesday, August 06, 2013 09:55
> To: Winkler, Tomas
> Cc: linux-kernel@vger.kernel.org
> Subject: [3.10 regression] mei endless recursion
> 
> Hi
> 
> We have a bug report when system fail to boot on 3.10 . It happens due to
> problem in mei which do endless calls:
> 
> mei_reset -> mei_hbm_start_req -> mei_reset -> mei_hbm_start_req -> ...
> 
> It did not happen on 3.9.

This is the same as https://bugzilla.kernel.org/show_bug.cgi?id=60612
There is few issues with the reset but this major root cause should be fixed by this patch https://lkml.org/lkml/2013/7/17/219

Thanks
Tomas

Re: [3.10 regression] mei endless recursion

[Stanislaw Gruszka]

Hi

On Wed, Aug 07, 2013 at 11:15:20AM +0000, Winkler, Tomas wrote:
> > We have a bug report when system fail to boot on 3.10 . It happens due to
> > problem in mei which do endless calls:
> > 
> > mei_reset -> mei_hbm_start_req -> mei_reset -> mei_hbm_start_req -> ...
> > 
> > It did not happen on 3.9.
> 
> This is the same as https://bugzilla.kernel.org/show_bug.cgi?id=60612
> There is few issues with the reset but this major root cause should be fixed by this patch https://lkml.org/lkml/2013/7/17/219

FYI: user reported that this patch did not fix problem for him, though
system boot now, but recursion happened when he tried to login.

Thanks
Stanislaw