linux-kernel - Re: [PATCH v2] ASoC: soc-card: soc-card-test: Fix some error handling in probe()

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Date: Wed, 10 Apr 2024 18:31:51 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Richard Fitzgerald <rf@...nsource.cirrus.com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
	linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v2] ASoC: soc-card: soc-card-test: Fix some error
 handling in probe()

On Wed, Apr 10, 2024 at 03:43:45PM +0100, Richard Fitzgerald wrote:
> On 10/4/24 15:22, Dan Carpenter wrote:
> > Fix this reversed if statement and call put_device() before returning
> > the error code.
> > 
> > Fixes: ef7784e41db7 ("ASoC: soc-card: Add KUnit test case for snd_soc_card_get_kcontrol")
> > Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
> > ---
> > v2: call put_device()
> > 
> >   sound/soc/soc-card-test.c | 4 +++-
> >   1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/sound/soc/soc-card-test.c b/sound/soc/soc-card-test.c
> > index 075c52fe82e5..faf9a3d46884 100644
> > --- a/sound/soc/soc-card-test.c
> > +++ b/sound/soc/soc-card-test.c
> > @@ -148,8 +148,10 @@ static int soc_card_test_case_init(struct kunit *test)
> >   	priv->card->owner = THIS_MODULE;
> >   	ret = snd_soc_register_card(priv->card);
> > -	if (!ret)
> > +	if (ret) {
> > +		put_device(priv->card_dev);
> >   		return ret;
> > +	}
> >   	return 0;
> >   }
> 
> Thanks.
> Reviewed-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
> 
> I can see that put_device() is also missing earlier in the
> function:
> 
> 	if (!priv->card)
> 		return -ENOMEM;
> 
> I can send a fix for that.

No.  Let me resend.  I'm sorry, this patch has not been up to proper
standards.  Also I should fix Smatch to warn about missing put_device()
calls to prevent this sort of thing going forward.

regards,
dan carpenter