linux-kernel - Re: [PATCH] tg3: add new module param to force device power down on reboot

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Date: Tue, 9 Jan 2024 23:17:36 -0800
From: Michael Chan <michael.chan@...adcom.com>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Pavan Chebbi <pavan.chebbi@...adcom.com>, Andrea Fois <andrea.fois@...ntsense.it>, 
	Michael Chan <mchan@...adcom.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	George Shuklin <george.shuklin@...il.com>, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tg3: add new module param to force device power down on reboot

On Tue, Jan 9, 2024 at 11:09 PM Heiner Kallweit <hkallweit1@...il.com> wrote:
>
> On 10.01.2024 05:12, Pavan Chebbi wrote:
> > I think the second suggestion could be a better solution. Helps to
> > solve the issue 9fc3bc764334 is trying to fix.
> > But I am not sure how easy it is to test. As I recall, Goerge was
> > unable to reach out to the author of 2ca1c94ce0b6 when he wanted to
> > test his patch for regression.
> > We did discuss the risk of this regression.
> > https://patchwork.kernel.org/project/netdevbpf/patch/20231101130418.44164-1-george.shuklin@gmail.com/
> > Unfortunately, looks like it has come true :(
>
> If the culprit is an unexpected MSI interrupt, then you may also address
> this directly by disabling interrupts in the device. tg3_stop() may be
> a candidate here.
>

We already call dev_close() which will call tg3_close() -> tg3_stop()
a few lines above.

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