linux-kernel - Re: [PATCH net-next] net: ethtool: phy: Clear the netdev context pointer for DUMP requests

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Message-ID: <20240913091404.3d4a9d19@fedora.home>
Date: Fri, 13 Sep 2024 09:14:04 +0200
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org,
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Subject: Re: [PATCH net-next] net: ethtool: phy: Clear the netdev context
 pointer for DUMP requests

Hello Jakub,

On Thu, 12 Sep 2024 20:44:38 -0700
Jakub Kicinski <kuba@...nel.org> wrote:

> On Wed, 11 Sep 2024 15:46:21 +0200 Maxime Chevallier wrote:
> > +		/* Clear the context netdev pointer so avoid a netdev_put from
> > +		 * the .done() callback
> > +		 */
> > +		ctx->phy_req_info->base.dev = NULL;  
> 
> Why do we assign to req_base.dev in the first place?
> req is for the parsed request in my mind, and I don't
> see anything in the PHY dump handlers actually using dev?

After reading the code back, that's true. It's just a leftover from
when I hadn't considered that dumps could be interrupted/resumed.

Let me clean that up then.

Thanks for the review Jakub,

Maxime