linux-kernel - Re: [PATCH v2] driver: pmc_atom: free pmc->regmap when pmc_setup

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Message-ID: <Ya4Ytr9re/a8oP/6@smile.fi.intel.com>
Date:   Mon, 6 Dec 2021 16:05:42 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Dongliang Mu <mudongliangabcd@...il.com>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Irina Tirdea <irina.tirdea@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] driver: pmc_atom: free pmc->regmap when
 pmc_setup_clks fails

On Sun, Dec 05, 2021 at 04:44:19PM +0800, Dongliang Mu wrote:
> Smatch reports:
> 
> drivers/platform/x86/pmc_atom.c:496
> pmc_setup_dev() warn: 'pmc->regmap' not released on lines: 496.
> 
> Fix this by deallocating pm->regmap when pmc_setup_clks fails.
> 
> Fixes: 282a4e4ce5f9("platform/x86: Enable Atom PMC platform clocks")
> Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>

Okay, this driver is two in one, i.e. library for PMC access and some other
stuff. When you do iounmap() you ruin library routines with that.

So, my other comments are fine in general, but not applicable here.

NAK.

-- 
With Best Regards,
Andy Shevchenko