linux-kernel - Re: [PATCH net-next 9/9] net: pse-pd: Add PD692x0 PSE controller driver

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Message-ID: <47d42d52-943c-467d-bcc0-fcb274f69841@lunn.ch>
Date:   Thu, 16 Nov 2023 23:38:08 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Kory Maincent <kory.maincent@...tlin.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Russ Weight <russ.weight@...ux.dev>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 9/9] net: pse-pd: Add PD692x0 PSE controller
 driver

> +static int pd692x0_send_msg(struct pd692x0_priv *priv, struct pd692x0_msg *msg)
> +{
> +	const struct i2c_client *client = priv->client;
> +	int ret;
> +
> +	if (msg->content.key == PD692X0_KEY_CMD && priv->last_cmd_key) {
> +		while (time_is_after_jiffies(msecs_to_jiffies(30) + priv->last_cmd_key_time))
> +			usleep_range(1000, 2000);

That is a bit odd. Could you not just calculate how long a sleep is
needed, rather than loop?

	Andrew