linux-kernel - Re: [PATCH net] mvpp2: use correct size for memset

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Date:   Fri, 25 Nov 2016 20:57:35 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     jszhang@...vell.com, mw@...ihalf.com, tremyfr@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] mvpp2: use correct size for memset

From: Arnd Bergmann <arnd@...db.de>
Date: Thu, 24 Nov 2016 17:28:12 +0100

> gcc-7 detects a short memset in mvpp2, introduced in the original
> merge of the driver:
> 
> drivers/net/ethernet/marvell/mvpp2.c: In function 'mvpp2_cls_init':
> drivers/net/ethernet/marvell/mvpp2.c:3296:2: error: 'memset' used with length equal to number of elements without multiplication by element size [-Werror=memset-elt-size]
> 
> The result seems to be that we write uninitialized data into the
> flow table registers, although we did not get any warning about
> that uninitialized data usage.
> 
> Using sizeof() lets us initialize then entire array instead.
> 
> Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks.