Date: Sun, 26 Mar 2017 15:54:09 +0100
From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Leo Yan <leo.yan@linaro.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Alessandro Zummo <a.zummo@towertech.it>,
        Alexandre Belloni <alexandre.belloni@free-electrons.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Baptiste Reynal <b.reynal@virtualopensystems.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        rtc-linux@googlegroups.com, linux-arm-kernel@lists.infradead.org,
        kvm@vger.kernel.org, alsa-devel@alsa-project.org
Subject: Re: [PATCH 5/5] ALSA: AACI: Convert to use devm_ioremap_resource()
Message-ID: <20170326145409.GP7909@n2100.armlinux.org.uk>
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On Sun, Mar 26, 2017 at 10:41:54PM +0800, Leo Yan wrote:
> Convert to use devm_ioremap_resource() in probe function, otherwise it's
> missed to unremap this region if probe failed or rmmod module.

Again, wrong - just because there's nothing in the cleanup paths does
not mean it doesn't clean up.

static void aaci_free_card(struct snd_card *card)
{
        struct aaci *aaci = card->private_data;

        iounmap(aaci->base);
}

This unmaps the mapping you claim it fails to do so.  So, your patch
actually _creates_ bugs that were not there before.

NAK.

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