linux-kernel - RE: [PATCH] net: alacritech: Partially revert "net: alacritech: Switch to use dev_err

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Message-ID: <CO1PR11MB5089E36B575718BD74F92FA2D6972@CO1PR11MB5089.namprd11.prod.outlook.com>
Date: Fri, 30 Aug 2024 21:32:46 +0000
From: "Keller, Jacob E" <jacob.e.keller@...el.com>
To: Andrew Lunn <andrew@...n.ch>, Simon Horman <horms@...nel.org>
CC: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, Lino Sanfilippo
	<LinoSanfilippo@....de>, "David S. Miller" <davem@...emloft.net>, "Eric
 Dumazet" <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Yang Ruibin <11162571@...o.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] net: alacritech: Partially revert "net: alacritech:
 Switch to use dev_err_probe()"



> -----Original Message-----
> From: Andrew Lunn <andrew@...n.ch>
> Sent: Friday, August 30, 2024 1:34 PM
> To: Simon Horman <horms@...nel.org>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>; Lino Sanfilippo
> <LinoSanfilippo@....de>; David S. Miller <davem@...emloft.net>; Eric Dumazet
> <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
> <pabeni@...hat.com>; Keller, Jacob E <jacob.e.keller@...el.com>; Yang Ruibin
> <11162571@...o.com>; netdev@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] net: alacritech: Partially revert "net: alacritech: Switch to use
> dev_err_probe()"
> 
> On Fri, Aug 30, 2024 at 07:28:44PM +0100, Simon Horman wrote:
> > On Fri, Aug 30, 2024 at 07:00:14PM +0200, Krzysztof Kozlowski wrote:
> > > This reverts commit bf4d87f884fe8a4b6b61fe4d0e05f293d08df61c because it
> > > introduced dev_err_probe() in non-probe path, which is not desired.
> > > Calling it after successful probe, dev_err_probe() will set deferred
> > > status on the device already probed. See also documentation of
> > > dev_err_probe().
> >
> > I agree that using dev_err_probe() outside of a probe path is
> > inappropriate. And I agree that your patch addresses that problem
> > in the context of changes made by the cited commit.
> 
> Maybe device_set_deferred_probe_reason() could call device_is_bound()
> is check the device is not actually bound, and hence still in probe,
> and do a dev_warn(). That should help catch these errors.
> 

That seems reasonable to me.

> I assume the developers submitting these patches are also using a
> bot. It would be good if the bot could be trained to follow the call
> paths and ensure it only reports cases which are probe.
> 
> 	Andrew