netdev - Re: [PATCH net-next v2 8/8] ravb: Add tx_drop_cntrs to struct ravb_hw

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Date:   Wed, 4 Aug 2021 23:50:41 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Biju Das <biju.das.jz@...renesas.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergey Shtylyov <s.shtylyov@...russia.ru>,
        Adam Ford <aford173@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Yuusuke Ashizuka <ashiduka@...itsu.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH net-next v2 8/8] ravb: Add tx_drop_cntrs to struct
 ravb_hw_info

On 8/2/21 1:26 PM, Biju Das wrote:

> The register for retrieving TX drop counters is present only on R-Car Gen3
> and RZ/G2L; it is not present on R-Car Gen2.
> 
> Add the tx_drop_cntrs hw feature bit to struct ravb_hw_info, to enable this
> feature specifically for R-Car Gen3 now and later extend it to RZ/G2L.
> 
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> v2:
>  * Incorporated Andrew and Sergei's review comments for making it smaller patch
>    and provided detailed description.
> ---
>  drivers/net/ethernet/renesas/ravb.h      | 1 +
>  drivers/net/ethernet/renesas/ravb_main.c | 4 +++-
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index 0d640dbe1eed..35fbb9f60ba8 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
> @@ -1001,6 +1001,7 @@ struct ravb_hw_info {
>  
>  	/* hardware features */
>  	unsigned internal_delay:1;	/* RAVB has internal delays */
> +	unsigned tx_drop_cntrs:1;	/* RAVB has TX error counters */

   I suggest 'tx_counters' -- this name comes from the sh_eth driver for the same regs
(but negated meaning). And please don't call the hardware RAVB. :-)

[...]

MBR, Sergei