linux-kernel - Re: [PATCH net-next v2 07/12] net: stmmac: Add ethtool register dump for XGMAC cores

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Date:   Tue, 13 Aug 2019 14:19:18 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>
Cc:     netdev@...r.kernel.org, Joao Pinto <Joao.Pinto@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 07/12] net: stmmac: Add ethtool register
 dump for XGMAC cores

On Mon, 12 Aug 2019 11:44:06 +0200, Jose Abreu wrote:
>  static void stmmac_ethtool_gregs(struct net_device *dev,
>  			  struct ethtool_regs *regs, void *space)
>  {
> -	u32 *reg_space = (u32 *) space;
> -
>  	struct stmmac_priv *priv = netdev_priv(dev);
> +	int size = stmmac_ethtool_get_regs_len(dev);
> +	u32 *reg_space = (u32 *) space;
>  
> -	memset(reg_space, 0x0, REG_SPACE_SIZE);
> +	memset(reg_space, 0x0, size);

no need to zero regs, ethtool core zallocs them