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From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
To: Leigh Brown <leigh@solinno.co.uk>
Cc: linux-arm-kernel@lists.infradead.org
Subject: Re: Out-of-tree mwlwifi driver crashes
Date: Tue, 29 Jan 2019 15:59:13 +0100	[thread overview]
Message-ID: <20190129155913.163f1e98@windsurf> (raw)
In-Reply-To: <01e409217be1c1cb08ac3bab072fccd3@solinno.co.uk>

Hello Leigh,

On Tue, 29 Jan 2019 13:47:38 +0000
Leigh Brown <leigh@solinno.co.uk> wrote:

> The following commit causes the out-of-tree mwlwifi driver [1] to crash, 
> which
> I have found with git bisect.
> 
> commit 1f08673eef1236f7d02d93fcf596bb8531ef0d12
> Author: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> Date:   Thu Oct 18 17:37:18 2018 +0200
> 
>      PCI: mvebu: Convert to PCI emulated bridge config space
> 
>      Convert the pci-mvebu driver to use the pci-bridge-emul logic, that
>      helps emulating a root port PCI bridge configuration space.
> 
>      Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
>      [lorenzo.pieralisi@arm.com: updated commit log]
>      Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> 
> I have raised the issue with the driver maintainers but they responded 
> that
> this is a kernel regression [2].
> 
> Do you think this is a driver issue or a regression? I am happy to test 
> proposed
> fixes but I don't understand enough about the driver or PCI to 
> investigate.
> 
> If I revert that single commit, the issue goes away.

Thanks a lot for this report. This is the second report related to this
commit. I already started investigating, but didn't dedicate enough
time to find a proper fix yet.

Could you share the output of "lspci -vvv -xxx" with the commit applied
and reverted ?

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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  parent reply	other threads:[~2019-01-29 14:59 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-29 13:47 Out-of-tree mwlwifi driver crashes Leigh Brown
2019-01-29 13:53 ` Russell King - ARM Linux admin
2019-01-29 14:11   ` Leigh Brown
2019-01-29 14:59 ` Thomas Petazzoni [this message]
2019-01-29 15:25   ` Leigh Brown
2019-01-29 15:31     ` Thomas Petazzoni
2019-01-29 15:36       ` Leigh Brown
2019-01-31 15:46         ` Thomas Petazzoni
2019-01-31 15:46           ` Thomas Petazzoni
2019-01-31 16:06           ` Leigh Brown
2019-01-31 16:06             ` Leigh Brown
2019-01-31 16:10             ` Thomas Petazzoni
2019-01-31 16:10               ` Thomas Petazzoni
2019-02-12 13:41             ` Thomas Petazzoni
2019-02-12 13:41               ` Thomas Petazzoni
2019-02-12 16:10               ` Leigh Brown
2019-02-12 16:10                 ` Leigh Brown

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