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

[ Upstream commit 41bae58df411f9accf01ea660730649b2fab1dab ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 6959a74a6f4919bbb948476a94382872c37d8b85..c5db2d9d44eddb6622bccb5a0280891ad430825b 100644 (file)
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -441,10 +441,12 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
        } else {
                struct asoc_simple_card_info *cinfo;
 
+               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 ||
@@ -453,7 +455,7 @@ static int asoc_simple_card_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;
                }
 
                card->name              = (cinfo->card) ? cinfo->card : cinfo->name;