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Date:   Mon, 27 Jan 2020 07:24:56 +0100
From:   Michal Kubecek <mkubecek@suse.cz>
To:     netdev@vger.kernel.org
Cc:     Andrew Lunn <andrew@lunn.ch>, David Miller <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Jiri Pirko <jiri@resnulli.us>,
        Florian Fainelli <f.fainelli@gmail.com>,
        John Linville <linville@tuxdriver.com>,
        Johannes Berg <johannes@sipsolutions.net>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 3/7] ethtool: set message mask with DEBUG_SET
 request
Message-ID: <20200127062456.GC570@unicorn.suse.cz>
References: <cover.1580075977.git.mkubecek@suse.cz>
 <844bf6bf518640fbfc67b5dd7976d9e8683c2d2d.1580075977.git.mkubecek@suse.cz>
 <20200127010422.GD12816@lunn.ch>
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On Mon, Jan 27, 2020 at 02:04:22AM +0100, Andrew Lunn wrote:
> > +	ret = ethnl_parse_header(&req_info, tb[ETHTOOL_A_DEBUG_HEADER],
> > +				 genl_info_net(info), info->extack, true);
> 
> > +	dev_put(dev);
> 
> Hi Michal
> 
> While reviewing this patch i noticed this dev_put() and wondered where
> the dev_get() was. It is hiding inside ethnl_parse_header(). The
> documentation does make it clear it takes a reference on the device,
> but how many people read the documentation? I would not be too
> surprised if at some point in the future we have bugs from missing
> dev_put().
> 
> Could we make this a bit more explicit by calling it
> ethnl_parse_header_dev_get(). It is rather long though.

Good point, I'll think about the name some more and send a cleanup patch
when net-next reopens.

Michal