From: Wei Liu <wei.liu@kernel.org>
To: "Krzysztof Wilczyński" <kw@linux.com>
Cc: Wei Liu <wei.liu@kernel.org>,
Linux on Hyper-V List <linux-hyperv@vger.kernel.org>,
stable@kernel.org, Michael Kelley <mhklinux@outlook.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Dexuan Cui <decui@microsoft.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Rob Herring <robh@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Jake Oshins <jakeo@microsoft.com>,
"open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS"
<linux-pci@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3] PCI: hv: Return zero, not garbage, when reading PCI_INTERRUPT_PIN
Date: Wed, 3 Jul 2024 21:09:41 +0000 [thread overview]
Message-ID: <ZoW-FaSBPPDa8NX9@liuwe-devbox-debian-v2> (raw)
In-Reply-To: <20240703081247.GA4117643@rocinante>
On Wed, Jul 03, 2024 at 05:12:47PM +0900, Krzysztof Wilczyński wrote:
> Hello,
>
> > > The intent of the code snippet is to always return 0 for both
> > > PCI_INTERRUPT_LINE and PCI_INTERRUPT_PIN.
> > >
> > > The check misses PCI_INTERRUPT_PIN. This patch fixes that.
> > >
> > > This is discovered by this call in VFIO:
> > >
> > > pci_read_config_byte(vdev->pdev, PCI_INTERRUPT_PIN, &pin);
> > >
> > > The old code does not set *val to 0 because it misses the check for
> > > PCI_INTERRUPT_PIN. Garbage is returned in that case.
> [...]
> >
> > Bjorn & other PCI maintainers, do you want to pick this up via your
> > tree?
> >
> > I can pick this up via the hyperv tree if you prefer.
>
> We will pick this up. No worries.
Thank you very much!
>
> Krzysztof
>
next prev parent reply other threads:[~2024-07-03 21:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-01 20:26 [PATCH v3] PCI: hv: Return zero, not garbage, when reading PCI_INTERRUPT_PIN Wei Liu
2024-07-03 4:53 ` Wei Liu
2024-07-03 8:12 ` Krzysztof Wilczyński
2024-07-03 21:09 ` Wei Liu [this message]
2024-07-06 3:20 ` Krzysztof Wilczyński
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