netdev - Re: [PATCH v2] stmmac: fix pointer check after utilization in stmmac

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Date:   Mon, 04 May 2020 10:34:09 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     mmrmaximuzz@...il.com
Cc:     peppe.cavallaro@...com, alexandre.torgue@...com,
        joabreu@...opsys.com, mcoquelin.stm32@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] stmmac: fix pointer check after utilization in
 stmmac_interrupt

From: Maxim Petrov <mmrmaximuzz@...il.com>
Date: Mon, 4 May 2020 09:26:43 +0300

> The paranoidal pointer check in IRQ handler looks very strange - it
> really protects us only against bogus drivers which request IRQ line
> with null pointer dev_id. However, the code fragment is incorrect
> because the dev pointer is used before the actual check which leads
> to undefined behavior. Remove the check to avoid confusing people
> with incorrect code.
> 
> Signed-off-by: Maxim Petrov <mmrmaximuzz@...il.com>

Applied, thanks.