linux-kernel - Re: [PATCH] mtd: rawnand: denali: Fix a possible resource leak in denali_pci

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Message-ID: <20220919173518.35742b2f@xps-13>
Date:   Mon, 19 Sep 2022 17:35:18 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     "GONG, Ruiqi" <gongruiqi1@...wei.com>, richard@....at,
        vigneshr@...com, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, wangweiyang2@...wei.com
Subject: Re: [PATCH] mtd: rawnand: denali: Fix a possible resource leak in
 denali_pci_probe

Hi,

christophe.jaillet@...adoo.fr wrote on Mon, 1 Aug 2022 20:26:07 +0200:

> Le 01/08/2022 à 10:03, GONG, Ruiqi a écrit :
> > Call pci_release_regions() to retrieve the allocated resource when
> > devm_ioremap() or denali_init() failed.
> >   
> 
> Hi,
> this is not correct.
> 
> First, should you be right, you should also update the .remove() function the same way.
> 
> Second, at the beginning there is pcim_enable_device() call.
> This looked like magic to me when I first saw it, but this function makes some pci_ functions work just as it they were pcim_ functions.
> 
> See pcim_enable_device() ([1]), at line 2132.
> When pcim_release() ([2]) is called by the framework, then regions are released at line 2079

Interesting, I just see this answer now, please ignore my first comment
then, it's not useful.

Thanks Christophe for the feedback.

Cheers,
Miquèl