netdev - Re: [PATCH] can: softing: remove redundant NULL check

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Message-ID: <20240216172701.GP40273@kernel.org>
Date: Fri, 16 Feb 2024 17:27:01 +0000
From: Simon Horman <horms@...nel.org>
To: Daniil Dulov <d.dulov@...ddin.ru>
Cc: Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Kurt Van Dijck <dev.kurt@...dijck-laurijssen.be>,
	linux-can@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH] can: softing: remove redundant NULL check

On Sun, Feb 11, 2024 at 07:05:35AM -0800, Daniil Dulov wrote:
> In this case dev cannot be NULL, so remove redundant check.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 03fd3cf5a179 ("can: add driver for Softing card")
> Signed-off-by: Daniil Dulov <d.dulov@...ddin.ru>

Hi Daniil,

I am not sure that dev cannot be NULL.
But I do see that the code assumes it is not, and would crash if it is.
So I think that, functionally, your statement is correct.

	priv = netdev_priv(dev);
	card = priv->card;

Reviewed-by: Simon Horman <horms@...nel.org>