netdev - Re: [PATCH net-next 09/11] net: mscc: ocelot: make ocelot_init_timestamp take a const struct ptp_clock

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Date:   Fri, 18 Sep 2020 17:31:57 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, yangbo.lu@....com,
        xiaoliang.yang_1@....com, UNGLinuxDriver@...rochip.com,
        claudiu.manoil@....com, andrew@...n.ch, vivien.didelot@...il.com,
        f.fainelli@...il.com, kuba@...nel.org
Subject: Re: [PATCH net-next 09/11] net: mscc: ocelot: make
 ocelot_init_timestamp take a const struct ptp_clock_info

On 18/09/2020 13:57:51+0300, Vladimir Oltean wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
> 
> It is a good measure to ensure correctness if the structures that are
> meant to remain constant are only processed by functions that thake
> constant arguments.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
>  drivers/net/ethernet/mscc/ocelot_ptp.c | 3 ++-
>  include/soc/mscc/ocelot_ptp.h          | 3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/mscc/ocelot_ptp.c b/drivers/net/ethernet/mscc/ocelot_ptp.c
> index 1e08fe4daaef..a33ab315cc6b 100644
> --- a/drivers/net/ethernet/mscc/ocelot_ptp.c
> +++ b/drivers/net/ethernet/mscc/ocelot_ptp.c
> @@ -300,7 +300,8 @@ int ocelot_ptp_enable(struct ptp_clock_info *ptp,
>  }
>  EXPORT_SYMBOL(ocelot_ptp_enable);
>  
> -int ocelot_init_timestamp(struct ocelot *ocelot, struct ptp_clock_info *info)
> +int ocelot_init_timestamp(struct ocelot *ocelot,
> +			  const struct ptp_clock_info *info)
>  {
>  	struct ptp_clock *ptp_clock;
>  	int i;
> diff --git a/include/soc/mscc/ocelot_ptp.h b/include/soc/mscc/ocelot_ptp.h
> index 4a6b2f71b6b2..6a7388fa7cc5 100644
> --- a/include/soc/mscc/ocelot_ptp.h
> +++ b/include/soc/mscc/ocelot_ptp.h
> @@ -53,6 +53,7 @@ int ocelot_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
>  		      enum ptp_pin_function func, unsigned int chan);
>  int ocelot_ptp_enable(struct ptp_clock_info *ptp,
>  		      struct ptp_clock_request *rq, int on);
> -int ocelot_init_timestamp(struct ocelot *ocelot, struct ptp_clock_info *info);
> +int ocelot_init_timestamp(struct ocelot *ocelot,
> +			  const struct ptp_clock_info *info);
>  int ocelot_deinit_timestamp(struct ocelot *ocelot);
>  #endif
> -- 
> 2.25.1
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com