linux-kernel - Re: [PATCH v1] staging: greybus: audio: fix uninitialized value issue

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Message-ID: <CAAs3649URK20TyU=EpfoY9ow-fK6jSjP1214KTPnUUU_t2d-7g@mail.gmail.com>
Date:   Tue, 11 Aug 2020 22:15:42 +0530
From:   Vaibhav Agarwal <vaibhav.sr@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alex Elder <elder@...nel.org>, Johan Hovold <johan@...nel.org>,
        Mark Greer <mgreer@...malcreek.com>,
        devel@...verdev.osuosl.org, greybus-dev@...ts.linaro.org,
        Colin Ian King <colin.king@...onical.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] staging: greybus: audio: fix uninitialized value issue

On Mon, Aug 10, 2020 at 8:34 PM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> On Thu, Aug 06, 2020 at 09:51:57PM +0530, Vaibhav Agarwal wrote:
> > diff --git a/drivers/staging/greybus/audio_topology.c b/drivers/staging/greybus/audio_topology.c
> > index 2f9fdbdcd547..4b914d0edef2 100644
> > --- a/drivers/staging/greybus/audio_topology.c
> > +++ b/drivers/staging/greybus/audio_topology.c
> > @@ -456,6 +456,13 @@ static int gbcodec_mixer_dapm_ctl_put(struct snd_kcontrol *kcontrol,
> >       val = ucontrol->value.integer.value[0] & mask;
> >       connect = !!val;
> >
> > +     ret = gb_pm_runtime_get_sync(bundle);
> > +     if (ret)
> > +             return ret;
> > +
> > +     ret = gb_audio_gb_get_control(module->mgmt_connection, data->ctl_id,
> > +                                   GB_AUDIO_INVALID_INDEX, &gbvalue);
>
>
> We need to check "ret" after this.

Oops, my bad. Thanks Dan for reporting this. I'll share an updated patch soon.

--
regards,
vaibhav
>
> > +
> >       /* update ucontrol */
> >       if (gbvalue.value.integer_value[0] != val) {
> >               for (wi = 0; wi < wlist->num_widgets; wi++) {
> > @@ -466,16 +473,10 @@ static int gbcodec_mixer_dapm_ctl_put(struct snd_kcontrol *kcontrol,
>
> regards,
> dan carpenter
>