From: "Jiawen Wu" <jiawenwu@trustnetic.com>
To: "'Simon Horman'" <horms@kernel.org>
Cc: <netdev@vger.kernel.org>, "'Andrew Lunn'" <andrew+netdev@lunn.ch>,
"'David S. Miller'" <davem@davemloft.net>,
"'Eric Dumazet'" <edumazet@google.com>,
"'Jakub Kicinski'" <kuba@kernel.org>,
"'Paolo Abeni'" <pabeni@redhat.com>,
"'Mengyuan Lou'" <mengyuanlou@net-swift.com>,
<stable@vger.kernel.org>
Subject: RE: [PATCH net] net: libwx: fix device bus LAN ID
Date: Wed, 5 Nov 2025 18:05:29 +0800 [thread overview]
Message-ID: <093901dc4e3b$b753c630$25fb5290$@trustnetic.com> (raw)
In-Reply-To: <aQsf2tTu3_FAeRic@horms.kernel.org>
On Wed, Nov 5, 2025 5:59 PM, Simon Horman wrote:
> On Tue, Nov 04, 2025 at 02:23:21PM +0800, Jiawen Wu wrote:
> > The device bus LAN ID was obtained from PCI_FUNC(), but when a PF
> > port is passthrough to a virtual machine, the function number may not
> > match the actual port index on the device. This could cause the driver
> > to perform operations such as LAN reset on the wrong port.
> >
> > Fix this by reading the LAN ID from port status register.
> >
> > Fixes: a34b3e6ed8fb ("net: txgbe: Store PCI info")
> > Cc: stable@vger.kernel.org
> > Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
>
> Hi Jiawen Wu,
>
> I am wondering if these devises also support port swapping (maybe LAN
> Function Select bit of FACTPS). And if so, does it need to be taken into
> account here?
Does not support yet, thanks. :)
next prev parent reply other threads:[~2025-11-05 10:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-04 6:23 [PATCH net] net: libwx: fix device bus LAN ID Jiawen Wu
2025-11-05 9:58 ` Simon Horman
2025-11-05 10:05 ` Jiawen Wu [this message]
2025-11-05 11:47 ` Simon Horman
2025-11-06 2:10 ` patchwork-bot+netdevbpf
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