linux-kernel - Re: [PATCH v1] sound/pci/hda/patch_realtek: don't call alc_shutup

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Message-ID: <87o7t9531h.wl-tiwai@suse.de>
Date:   Mon, 14 Nov 2022 09:54:50 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Daniil Tatianin <d-tatianin@...dex-team.ru>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Tim Crawford <tcrawford@...tem76.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Meng Tang <tangmeng@...ontech.com>,
        Lucas Tanure <tanureal@...nsource.cirrus.com>,
        Philipp Jungkamp <p.jungkamp@....net>,
        Werner Sembach <wse@...edocomputers.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org, yc-core@...dex-team.ru
Subject: Re: [PATCH v1] sound/pci/hda/patch_realtek: don't call alc_shutup_pins without a spec

On Mon, 14 Nov 2022 09:35:10 +0100,
Daniil Tatianin wrote:
> 
> 
> 
> On 11/14/22 11:26 AM, Takashi Iwai wrote:
> > On Mon, 14 Nov 2022 09:20:48 +0100,
> > Daniil Tatianin wrote:
> >> 
> >> alc_shutup_pins always expects the spec to be present, so make sure
> >> it is before we call it.
> >> 
> >> Found by Linux Verification Center (linuxtesting.org) with the SVACE
> >> static analysis tool.
> >> 
> >> Signed-off-by: Daniil Tatianin <d-tatianin@...dex-team.ru>
> > 
> > In which path can it be without spec assigned?
> > That's the internal callback that is set only by the codec driver
> > where the allocation of codec->spec is mandatory.
> 
> Would you then say that the "if (spec && ...)" that was there before
> was redundant?

Yes.


Takashi