linux-kernel - Re: [RESEND PATCH] PCI: aardvark: Fix kernel panic during PIO transfer

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Date:   Thu, 17 Jun 2021 15:15:23 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Rob Herring <robh@...nel.org>,
        Pali Rohár <pali@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Marek Behún <kabel@...nel.org>,
        Xogium <contact@...ium.me>, linux-pci@...r.kernel.org,
        Remi Pommarel <repk@...plefau.lt>,
        Tomasz Maciej Nowak <tmn505@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] PCI: aardvark: Fix kernel panic during PIO
 transfer

On Wed, Jun 09, 2021 at 09:50:39AM +0100, Lorenzo Pieralisi wrote:
> On Tue, 8 Jun 2021 22:36:55 +0200, Pali Rohár wrote:
> > Trying to start a new PIO transfer by writing value 0 in PIO_START register
> > when previous transfer has not yet completed (which is indicated by value 1
> > in PIO_START) causes an External Abort on CPU, which results in kernel
> > panic:
> > 
> >     SError Interrupt on CPU0, code 0xbf000002 -- SError
> >     Kernel panic - not syncing: Asynchronous SError Interrupt
> > 
> > [...]
> 
> Applied to pci/aardvark, thanks!
> 
> [1/1] PCI: aardvark: Fix kernel panic during PIO transfer
>       https://git.kernel.org/lpieralisi/pci/c/f77378171b

Since this fixes a panic and only affects aardvark, I cherry picked
this to my for-linus branch.

Can you drop it, Lorenzo?  It's currently the only thing on your
pci/aardvark branch, so I just dropped that whole branch from -next.

Bjorn