netdev - Re: [PATCH net-next v2 3/3] ptp: ptp_ines: use new PTP_MSGTYPE

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Date:   Wed, 18 Nov 2020 13:03:56 -0800
From:   Jacob Keller <jacob.e.keller@...el.com>
To:     Christian Eggers <ceggers@...i.de>,
        Richard Cochran <richardcochran@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Vladimir Oltean <olteanv@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kurt Kanzenbach <kurt@...utronix.de>
Subject: Re: [PATCH net-next v2 3/3] ptp: ptp_ines: use new PTP_MSGTYPE_*
 define(s)



On 11/18/2020 8:22 AM, Christian Eggers wrote:
> Remove driver internal defines for this.
> 
> Signed-off-by: Christian Eggers <ceggers@...i.de>
> Cc: Richard Cochran <richardcochran@...il.com>
> Cc: Kurt Kanzenbach <kurt@...utronix.de>
> ---
>  drivers/ptp/ptp_ines.c | 19 +++++++------------
>  1 file changed, 7 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/ptp/ptp_ines.c b/drivers/ptp/ptp_ines.c
> index 4700ffbdfced..6c7c2843ba0b 100644
> --- a/drivers/ptp/ptp_ines.c
> +++ b/drivers/ptp/ptp_ines.c
> @@ -108,11 +108,6 @@ MODULE_LICENSE("GPL");
>  #define MESSAGE_TYPE_P_DELAY_RESP	3
>  #define MESSAGE_TYPE_DELAY_REQ		4
>  
> -#define SYNC				0x0
> -#define DELAY_REQ			0x1
> -#define PDELAY_REQ			0x2
> -#define PDELAY_RESP			0x3
> -
>  static LIST_HEAD(ines_clocks);
>  static DEFINE_MUTEX(ines_clocks_lock);
>  
> @@ -683,9 +678,9 @@ static bool is_sync_pdelay_resp(struct sk_buff *skb, int type)
>  
>  	msgtype = ptp_get_msgtype(hdr, type);
>  
> -	switch ((msgtype & 0xf)) {
> -	case SYNC:
> -	case PDELAY_RESP:
> +	switch (msgtype) {
> +	case PTP_MSGTYPE_SYNC:
> +	case PTP_MSGTYPE_PDELAY_RESP:

This has a functional change of no longer discarding the higher bits of
msgtype. While this may be correct, I think it should at least be called
out as to why in the commit message.

>  		return true;
>  	default:
>  		return false;
> @@ -696,13 +691,13 @@ static u8 tag_to_msgtype(u8 tag)
>  {
>  	switch (tag) {
>  	case MESSAGE_TYPE_SYNC:
> -		return SYNC;
> +		return PTP_MSGTYPE_SYNC;
>  	case MESSAGE_TYPE_P_DELAY_REQ:
> -		return PDELAY_REQ;
> +		return PTP_MSGTYPE_PDELAY_REQ;
>  	case MESSAGE_TYPE_P_DELAY_RESP:
> -		return PDELAY_RESP;
> +		return PTP_MSGTYPE_PDELAY_RESP;
>  	case MESSAGE_TYPE_DELAY_REQ:
> -		return DELAY_REQ;
> +		return PTP_MSGTYPE_DELAY_REQ;
>  	}
>  	return 0xf;
>  }
>