From: Simon Horman <horms@kernel.org>
To: Jiawen Wu <jiawenwu@trustnetic.com>
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 09:58:50 +0000 [thread overview]
Message-ID: <aQsf2tTu3_FAeRic@horms.kernel.org> (raw)
In-Reply-To: <B60A670C1F52CB8E+20251104062321.40059-1-jiawenwu@trustnetic.com>
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?
...
next prev parent reply other threads:[~2025-11-05 9:58 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 [this message]
2025-11-05 10:05 ` Jiawen Wu
2025-11-05 11:47 ` Simon Horman
2025-11-06 2:10 ` patchwork-bot+netdevbpf
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