linux-kernel - Re: [PATCH v2 net-next 4/9] net: dsa: microchip: add DSA support for microchip lan937x

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Message-ID: <YIIHpfW4nF/H/GJe@lunn.ch>
Date:   Fri, 23 Apr 2021 01:32:53 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Prasanna Vengateshan <prasanna.vengateshan@...rochip.com>
Cc:     netdev@...r.kernel.org, olteanv@...il.com, robh+dt@...nel.org,
        UNGLinuxDriver@...rochip.com, hkallweit1@...il.com,
        linux@...linux.org.uk, davem@...emloft.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org, vivien.didelot@...il.com,
        f.fainelli@...il.com, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 net-next 4/9] net: dsa: microchip: add DSA support for
 microchip lan937x

> +static void lan937x_r_mib_cnt(struct ksz_device *dev, int port, u16 addr,
> +			      u64 *cnt)
> +{
> +	unsigned int val;
> +	u32 data;
> +	int ret;
> +
> +	/* Enable MIB Counter read*/
> +	data = MIB_COUNTER_READ;
> +	data |= (addr << MIB_COUNTER_INDEX_S);
> +	lan937x_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data);
> +
> +	ret = regmap_read_poll_timeout(dev->regmap[2],
> +				       PORT_CTRL_ADDR(port,
> +						      REG_PORT_MIB_CTRL_STAT__4),
> +					   val, !(val & MIB_COUNTER_READ), 10, 1000);
> +	/* failed to read MIB. get out of loop */

Another loop which is not a loop. Please review your comments and
check they make sense.

      Andrew