linux-kernel - Re: [PATCH] PCI: Avoid broken MSI on SB600 USB devices

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Message-ID: <20220323111131.GA1272756@bhelgaas>
Date:   Wed, 23 Mar 2022 06:11:31 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     linux-pci <linux-pci@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mick Lorain <micklorain@...tonmail.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH] PCI: Avoid broken MSI on SB600 USB devices

On Wed, Mar 23, 2022 at 10:03:38AM +0200, Andy Shevchenko wrote:
> On Wed, Mar 23, 2022 at 4:26 AM Bjorn Helgaas <helgaas@...nel.org> wrote:
> > On Mon, Mar 21, 2022 at 01:34:46PM -0500, Bjorn Helgaas wrote:
> > > From: Bjorn Helgaas <bhelgaas@...gle.com>
> > >
> > > Some ATI SB600 USB adapters advertise MSI, but if INTx is disabled by
> > > setting PCI_COMMAND_INTX_DISABLE,
> 
> > > MSI doesn't work either.
> 
> I think this is not correct.

I'd like to make it correct.  What would make this better?  I was
trying to say the same as your original commit log:

  ATI PCIe-USB adapter advertises MSI, but it doesn't work if INTx is
  disabled.

Bjorn