linux-kernel - Re: [PATCH 25/31] ethernet: use parity8 in sun/niu.c

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Date:	Mon, 28 Mar 2016 10:33:48 -0400
From:	Michal Nazarewicz <mina86@...a86.com>
To:	"zhaoxiu.zeng" <zhaoxiu.zeng@...il.com>,
	Jiri Pirko <jiri@...nulli.us>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Vlastimil Babka <vbabka@...e.cz>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 25/31] ethernet: use parity8 in sun/niu.c

On Sun, Mar 27 2016, zhaoxiu zeng wrote:
> From: Zeng Zhaoxiu <zhaoxiu.zeng@...il.com>
>
> Signed-off-by: Zeng Zhaoxiu <zhaoxiu.zeng@...il.com>

No idea why I’ve been CC’d, but code looks good to me so:

Acked-by: Michal Nazarewicz <mina86@...a86.com>

> ---
>  drivers/net/ethernet/sun/niu.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
> index 9cc4564..8c344ef 100644
> --- a/drivers/net/ethernet/sun/niu.c
> +++ b/drivers/net/ethernet/sun/niu.c
> @@ -2742,18 +2742,12 @@ static int niu_set_alt_mac_rdc_table(struct niu *np, int idx,
>  
>  static u64 vlan_entry_set_parity(u64 reg_val)
>  {
> -	u64 port01_mask;
> -	u64 port23_mask;
> -
> -	port01_mask = 0x00ff;
> -	port23_mask = 0xff00;
> -
> -	if (hweight64(reg_val & port01_mask) & 1)
> +	if (parity8(reg_val))
>  		reg_val |= ENET_VLAN_TBL_PARITY0;
>  	else
>  		reg_val &= ~ENET_VLAN_TBL_PARITY0;
>  
> -	if (hweight64(reg_val & port23_mask) & 1)
> +	if (parity8((unsigned int)reg_val >> 8))
>  		reg_val |= ENET_VLAN_TBL_PARITY1;
>  	else
>  		reg_val &= ~ENET_VLAN_TBL_PARITY1;
> -- 
> 2.5.5
>

-- 
Best regards
ミハウ “𝓶𝓲𝓷𝓪86” ナザレヴイツ
«If at first you don’t succeed, give up skydiving»