ASoC: simple-card: fixup asoc_simple_probe() error handling

asoc_simple_probe() is used for both "DT probe" (A) and "platform probe"
(B). It uses "goto err" when error case, but it is not needed for
"platform probe" case (B). Thus it is using "return" directly there.

	static int asoc_simple_probe(...)
	{
 ^		if (...) {
 |			...
(A)			if (ret < 0)
 |				goto err;
 v		} else {
 ^			...
 |			if (ret < 0)
(B)				return -Exxx;
 v		}

		...
 ^		if (ret < 0)
(C)			goto err;
 v		...

	err:
(D)		simple_util_clean_reference(card);

		return ret;
	}

Both case are using (C) part, and it calls (D) when err case.
But (D) will do nothing for (B) case.
Because of these behavior, current code itself is not wrong,
but is confusable, and more, static analyzing tool will warning on
(B) part (should use goto err).

To avoid static analyzing tool warning, this patch uses "goto err"
on (B) part.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87o7hy7mlh.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 190f11366e84e0075625604f341d633f4b0075dd..274417e39e7de0972e0132846d944094843e650c 100644 (file)
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -759,10 +759,12 @@ static int asoc_simple_probe(struct platform_device *pdev)
                struct snd_soc_dai_link *dai_link = priv->dai_link;
                struct simple_dai_props *dai_props = priv->dai_props;
 
+               ret = -EINVAL;
+
                cinfo = dev->platform_data;
                if (!cinfo) {
                        dev_err(dev, "no info for asoc-simple-card\n");
-                       return -EINVAL;
+                       goto err;
                }
 
                if (!cinfo->name ||
@@ -771,7 +773,7 @@ static int asoc_simple_probe(struct platform_device *pdev)
                    !cinfo->platform ||
                    !cinfo->cpu_dai.name) {
                        dev_err(dev, "insufficient asoc_simple_card_info settings\n");
-                       return -EINVAL;
+                       goto err;
                }
 
                cpus                    = dai_link->cpus;