linux-kernel - Re: [PATCH net-next] net: stmmac: set get_rx_header_len() as void for it didn't have any error code to return

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Date:   Fri, 11 Sep 2020 14:37:49 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     luojiaxing@...wei.com
Cc:     peppe.cavallaro@...com, alexandre.torgue@...com,
        joabreu@...opsys.com, kuba@...nel.org, mcoquelin.stm32@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com
Subject: Re: [PATCH net-next] net: stmmac: set get_rx_header_len() as void
 for it didn't have any error code to return

From: Luo Jiaxing <luojiaxing@...wei.com>
Date: Fri, 11 Sep 2020 11:55:58 +0800

> We found the following warning when using W=1 to build kernel:
> 
> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:3634:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
> int ret, coe = priv->hw->rx_csum;
> 
> When digging stmmac_get_rx_header_len(), dwmac4_get_rx_header_len() and
> dwxgmac2_get_rx_header_len() return 0 only, without any error code to
> report. Therefore, it's better to define get_rx_header_len() as void.
> 
> Signed-off-by: Luo Jiaxing <luojiaxing@...wei.com>

Applied, thank you.