netdev - Re: [PATCH net-next resend 1/2] enetc: Fix endianness issues for enetc

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Date:   Thu, 19 Nov 2020 13:37:21 +0300
From:   Denis Kirjanov <kda@...ux-powerpc.org>
To:     Claudiu Manoil <claudiu.manoil@....com>
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next resend 1/2] enetc: Fix endianness issues for enetc_ethtool

On 11/19/20, Claudiu Manoil <claudiu.manoil@....com> wrote:
> These particular fields are specified in the H/W reference
> manual as having network byte order format, so enforce big
> endian annotation for them and clear the related sparse
> warnings in the process.
>
> Signed-off-by: Claudiu Manoil <claudiu.manoil@....com>
> ---
>  drivers/net/ethernet/freescale/enetc/enetc_hw.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/freescale/enetc/enetc_hw.h
> b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
> index 68ef4f959982..04efccd11162 100644
> --- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h
> +++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
> @@ -472,10 +472,10 @@ struct enetc_cmd_rfse {
>  	u8 smac_m[6];
>  	u8 dmac_h[6];
>  	u8 dmac_m[6];
> -	u32 sip_h[4];
> -	u32 sip_m[4];
> -	u32 dip_h[4];
> -	u32 dip_m[4];
> +	__be32 sip_h[4];
> +	__be32 sip_m[4];
> +	__be32 dip_h[4];
> +	__be32 dip_m[4];
>  	u16 ethtype_h;
>  	u16 ethtype_m;
>  	u16 ethtype4_h;

Hi Claudiu,

Why the struct is declared without packed?
I'm seeing that the structure is used in dma transfers in the driver

> --
> 2.17.1
>
>