linux-kernel - Re: [PATCH resubmit net 1/2] net: fec: Forward-declare `fec_ptp

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Message-ID: <ZrN+SM0LOY0yQxBl@lizhi-Precision-Tower-5810>
Date: Wed, 7 Aug 2024 10:01:44 -0400
From: Frank Li <Frank.li@....com>
To: Csókás, Bence <csokas.bence@...lan.hu>
Cc: Jakub Kicinski <kuba@...nel.org>, imx@...ts.linux.dev,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Wei Fang <wei.fang@....com>, Shenwei Wang <shenwei.wang@....com>,
	Clark Wang <xiaoning.wang@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH resubmit net 1/2] net: fec: Forward-declare
 `fec_ptp_read()`

On Wed, Aug 07, 2024 at 10:29:17AM +0200, Csókás, Bence wrote:
> This function is used in `fec_ptp_enable_pps()` through
> struct cyclecounter read(). Forward declarations make
> it clearer, what's happening.
>
> Fixes: 61d5e2a251fb ("fec: Fix timer capture timing in `fec_ptp_enable_pps()`")
> Suggested-by: Frank Li <Frank.li@....com>
> Link: https://lore.kernel.org/netdev/20240805144754.2384663-1-csokas.bence@prolan.hu/T/#ma6c21ad264016c24612048b1483769eaff8cdf20
> Signed-off-by: Csókás, Bence <csokas.bence@...lan.hu>

Reviewed-by: Frank Li <Frank.Li@....com>

> ---
>  drivers/net/ethernet/freescale/fec_ptp.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c
> index e32f6724f568..fdbf61069a05 100644
> --- a/drivers/net/ethernet/freescale/fec_ptp.c
> +++ b/drivers/net/ethernet/freescale/fec_ptp.c
> @@ -90,6 +90,8 @@
>  #define FEC_PTP_MAX_NSEC_PERIOD		4000000000ULL
>  #define FEC_PTP_MAX_NSEC_COUNTER	0x80000000ULL
>
> +static u64 fec_ptp_read(const struct cyclecounter *cc);
> +
>  /**
>   * fec_ptp_enable_pps
>   * @fep: the fec_enet_private structure handle
> @@ -136,7 +138,7 @@ static int fec_ptp_enable_pps(struct fec_enet_private *fep, uint enable)
>  		 * NSEC_PER_SEC - ts.tv_nsec. Add the remaining nanoseconds
>  		 * to current timer would be next second.
>  		 */
> -		tempval = fep->cc.read(&fep->cc);
> +		tempval = fec_ptp_read(&fep->cc);
>  		/* Convert the ptp local counter to 1588 timestamp */
>  		ns = timecounter_cyc2time(&fep->tc, tempval);
>  		ts = ns_to_timespec64(ns);
> --
> 2.34.1
>
>