linux-kernel - Re: [PATCH] net: allwinner: Fix some resources leak in the error handling path of the probe and in the remove function

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Message-ID: <20201215113710.wh4ezrvmqbpxd5yi@gilmour>
Date:   Tue, 15 Dec 2020 12:37:10 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        davem@...emloft.net, kuba@...nel.org, wens@...e.org,
        jernej.skrabec@...l.net, timur@...nel.org,
        song.bao.hua@...ilicon.com, f.fainelli@...il.com, leon@...nel.org,
        hkallweit1@...il.com, wangyunjian@...wei.com, sr@...x.de,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] net: allwinner: Fix some resources leak in the error
 handling path of the probe and in the remove function

On Tue, Dec 15, 2020 at 12:11:53PM +0300, Dan Carpenter wrote:
> On Tue, Dec 15, 2020 at 09:56:55AM +0100, Maxime Ripard wrote:
> > Hi,
> > 
> > On Mon, Dec 14, 2020 at 09:21:17PM +0100, Christophe JAILLET wrote:
> > > 'irq_of_parse_and_map()' should be balanced by a corresponding
> > > 'irq_dispose_mapping()' call. Otherwise, there is some resources leaks.
> > 
> > Do you have a source to back that? It's not clear at all from the
> > documentation for those functions, and couldn't find any user calling it
> > from the ten-or-so random picks I took.
> 
> It looks like irq_create_of_mapping() needs to be freed with
> irq_dispose_mapping() so this is correct.

The doc should be updated first to make that clear then, otherwise we're
going to fix one user while multiples will have poped up

Maxime

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