linux-kernel - Re: [PATCH] net: lan9303: fix missing error handling

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Message-Id: <20190310.110048.309189899020593567.davem@davemloft.net>
Date:   Sun, 10 Mar 2019 11:00:48 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     kjlu@....edu
Cc:     pakki001@....edu, andrew@...n.ch, vivien.didelot@...il.com,
        f.fainelli@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: lan9303: fix missing error handling

From: Kangjie Lu <kjlu@....edu>
Date: Sun, 10 Mar 2019 03:08:56 -0500

> Both lan9303_phy_write and regmap_write may fail. The fix adds
> the error handling to print error messages upon failure.
> 
> Signed-off-by: Kangjie Lu <kjlu@....edu>

It's ignored elsewhere in this driver in places you haven't handled.

I doubt this is much of an improvement to the driver to be quite
honest.

I disagree with the mantra that just because an error is potentially
returned, that it always must be checked.