linux-kernel - Re: [PATCH net-next v3 3/3] net: dp83869: Add speed optimization feature

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Date:   Tue, 8 Sep 2020 09:07:22 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <davem@...emloft.net>, <andrew@...n.ch>, <f.fainelli@...il.com>,
        <hkallweit1@...il.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v3 3/3] net: dp83869: Add speed optimization
 feature

Jakub

On 9/5/20 1:38 PM, Jakub Kicinski wrote:
> On Thu, 3 Sep 2020 06:42:59 -0500 Dan Murphy wrote:
>> +static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
>> +{
>> +	int val, count;
>> +
>> +	if (cnt > DP83869_DOWNSHIFT_8_COUNT)
>> +		return -E2BIG;
> ERANGE

This is not checking a range but making sure it is not bigger then 8.

IMO I would use ERANGE if the check was a boundary check for upper and 
lower bounds.

Dan