netdev - Re: [PATCH net-next 11/13] sunhme: Combine continued messages

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Message-ID: <14992029.3CObj9AJNb@eto.sf-tec.de>
Date:   Mon, 19 Sep 2022 15:23:46 +0200
From:   Rolf Eike Beer <eike-kernel@...tec.de>
To:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        Sean Anderson <seanga2@...il.com>
Cc:     linux-kernel@...r.kernel.org, Zheyu Ma <zheyuma97@...il.com>,
        Nick Bowler <nbowler@...conx.ca>,
        Sean Anderson <seanga2@...il.com>
Subject: Re: [PATCH net-next 11/13] sunhme: Combine continued messages

Am Montag, 19. September 2022, 01:26:24 CEST schrieb Sean Anderson:
> This driver seems to have been written under the assumption that messages
> can be continued arbitrarily. I'm not when this changed (if ever), but such
> ad-hoc continuations are liable to be rudely interrupted. Convert all such
> instances to single prints. This loses a bit of timing information (such as
> when a line was constructed piecemeal as the function executed), but it's
> easy to add a few prints if necessary. This also adds newlines to the ends
> of any prints without them.

I have a similar patch around, but yours catches more places.

> diff --git a/drivers/net/ethernet/sun/sunhme.c
> b/drivers/net/ethernet/sun/sunhme.c index 98c38e213bab..9965c9c872a6 100644
> --- a/drivers/net/ethernet/sun/sunhme.c
> +++ b/drivers/net/ethernet/sun/sunhme.c
> @@ -330,7 +331,6 @@ static int happy_meal_bb_read(struct happy_meal *hp,
>  	int retval = 0;
>  	int i;
> 
> -	ASD("happy_meal_bb_read: reg=%d ", reg);
> 
>  	/* Enable the MIF BitBang outputs. */
>  	hme_write32(hp, tregs + TCVR_BBOENAB, 1);

You can remove one of the empty lines here.

> @@ -1196,15 +1182,15 @@ static void happy_meal_init_rings(struct happy_meal
> *hp) struct hmeal_init_block *hb = hp->happy_block;
>  	int i;
> 
> -	HMD("happy_meal_init_rings: counters to zero, ");
> +	HMD("counters to zero\n");
>  	hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
> 
>  	/* Free any skippy bufs left around in the rings. */
> -	HMD("clean, ");
> +	HMD("clean\n");

I don't think this one is actually needed, there isn't much than can happen in 
between these 2 prints.

> @@ -1282,17 +1268,11 @@ happy_meal_begin_auto_negotiation(struct happy_meal
> *hp, * XXX so I completely skip checking for it in the BMSR for now. */
> 
> -#ifdef AUTO_SWITCH_DEBUG
> -		ASD("%s: Advertising [ ");
> -		if (hp->sw_advertise & ADVERTISE_10HALF)
> -			ASD("10H ");
> -		if (hp->sw_advertise & ADVERTISE_10FULL)
> -			ASD("10F ");
> -		if (hp->sw_advertise & ADVERTISE_100HALF)
> -			ASD("100H ");
> -		if (hp->sw_advertise & ADVERTISE_100FULL)
> -			ASD("100F ");
> -#endif
> +		ASD("Advertising [ %s%s%s%s]\n",
> +		    hp->sw_advertise & ADVERTISE_10HALF ? "10H " : "",
> +		    hp->sw_advertise & ADVERTISE_10FULL ? "10F " : "",
> +		    hp->sw_advertise & ADVERTISE_100HALF ? "100H " : "",
> +		    hp->sw_advertise & ADVERTISE_100FULL ? "100F " : 
"");
> 
>  		/* Enable Auto-Negotiation, this is usually on 
already... */
>  		hp->sw_bmcr |= BMCR_ANENABLE;

Completely independent of this driver, but I wonder if there is no generic 
function to print these 10/100/* full/half duplex strings? There are several 
drivers doing this as a quick grep shows.

Eike
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