linux-kernel - Re: [PATCH net-next v4 01/15] net: dsa: vsc73xx: use read_poll

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Date: Wed, 14 Feb 2024 00:07:00 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: Pawel Dembicki <paweldembicki@...il.com>
Cc: netdev@...r.kernel.org, Russell King <linux@...linux.org.uk>, 
	Andrew Lunn <andrew@...n.ch>, Florian Fainelli <f.fainelli@...il.com>, 
	Vladimir Oltean <olteanv@...il.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Claudiu Manoil <claudiu.manoil@....com>, Alexandre Belloni <alexandre.belloni@...tlin.com>, 
	UNGLinuxDriver@...rochip.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v4 01/15] net: dsa: vsc73xx: use
 read_poll_timeout instead delay loop

On Tue, Feb 13, 2024 at 11:04 PM Pawel Dembicki <paweldembicki@...il.com> wrote:


> This commit switches delay loop to read_poll_timeout macro during
> Arbiter empty check in adjust link function.
>
> As Russel King suggested:
>
> "This [change] avoids the issue that on the last iteration, the code reads
> the register, test it, find the condition that's being waiting for is
> false, _then_ waits and end up printing the error message - that last
> wait is rather useless, and as the arbiter state isn't checked after
> waiting, it could be that we had success during the last wait."
>
> It also remove one short msleep delay.
>
> Suggested-by: Russell King <linux@...linux.org.uk>
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij