linux-kernel - Re: [PATCH 4/4] extcon: extcon-max8997: Fix IRQ freeing at error path

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Date:   Tue, 11 May 2021 06:32:20 +0300
From:   Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Chanwoo Choi <cw00.choi@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] extcon: extcon-max8997: Fix IRQ freeing at error
 path

Hi Krzysztof,

On Mon, 2021-05-10 at 10:21 -0400, Krzysztof Kozlowski wrote:
> On 10/05/2021 04:12, Matti Vaittinen wrote:
> > If reading MAX8997_MUIC_REG_STATUS1 fails at probe the driver exits
> > without freeing the requested IRQs.
> 
> The driver frees IRQ on probe failure, so maybe you meant missing IRQ
> mapping dispose?

No. The commit 3e34c8198960 ("extcon: max8997: Avoid forcing UART path
on drive probe") introduced a return w/o IRQ freeing if reading the
MAX8997_MUIC_REG_STATUS1 fails at the end of the probe. This is not
visible in the patch though - as the return is Ok after the IRQs and
work-queue cancellation are managed by devm.

Best Regards
	--Matti Vaittinen