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From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: Support Opensource <support.opensource@diasemi.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>,
	Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	alsa-devel@alsa-project.org
Subject: [PATCH] ASoC: da7219: Fix an error handling path in da7219_register_dai_clks()
Date: Thu, 22 Sep 2022 21:44:57 +0200	[thread overview]
Message-ID: <e4acceab57a0d9e477a8d5890a45c5309e553e7c.1663875789.git.christophe.jaillet@wanadoo.fr> (raw)

If clk_hw_register() fails, the corresponding clk should not be
unregistered.

To handle errors from loops, clean up partial iterations before doing the
goto.  So add a clk_hw_unregister().
Then use a while (--i >= 0) loop in the unwind section.

Fixes: 78013a1cf297 ("ASoC: da7219: Fix clock handling around codec level probe")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
See https://lore.kernel.org/all/4fdde55198294a07f04933f7cef937fcb654c901.1624425670.git.christophe.jaillet@wanadoo.fr/
for an incomplete patch sent last year and Dan's comment on it.
---
 sound/soc/codecs/da7219.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c
index 50ecf30e6136..4746c8700451 100644
--- a/sound/soc/codecs/da7219.c
+++ b/sound/soc/codecs/da7219.c
@@ -2196,6 +2196,7 @@ static int da7219_register_dai_clks(struct snd_soc_component *component)
 			dai_clk_lookup = clkdev_hw_create(dai_clk_hw, init.name,
 							  "%s", dev_name(dev));
 			if (!dai_clk_lookup) {
+				clk_hw_unregister(dai_clk_hw);
 				ret = -ENOMEM;
 				goto err;
 			} else {
@@ -2217,12 +2218,12 @@ static int da7219_register_dai_clks(struct snd_soc_component *component)
 	return 0;
 
 err:
-	do {
+	while (--i >= 0) {
 		if (da7219->dai_clks_lookup[i])
 			clkdev_drop(da7219->dai_clks_lookup[i]);
 
 		clk_hw_unregister(&da7219->dai_clks_hw[i]);
-	} while (i-- > 0);
+	}
 
 	if (np)
 		kfree(da7219->clk_hw_data);
-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: Support Opensource <support.opensource@diasemi.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>,
	Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Dan Carpenter <dan.carpenter@oracle.com>
Subject: [PATCH] ASoC: da7219: Fix an error handling path in da7219_register_dai_clks()
Date: Thu, 22 Sep 2022 21:44:57 +0200	[thread overview]
Message-ID: <e4acceab57a0d9e477a8d5890a45c5309e553e7c.1663875789.git.christophe.jaillet@wanadoo.fr> (raw)

If clk_hw_register() fails, the corresponding clk should not be
unregistered.

To handle errors from loops, clean up partial iterations before doing the
goto.  So add a clk_hw_unregister().
Then use a while (--i >= 0) loop in the unwind section.

Fixes: 78013a1cf297 ("ASoC: da7219: Fix clock handling around codec level probe")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
See https://lore.kernel.org/all/4fdde55198294a07f04933f7cef937fcb654c901.1624425670.git.christophe.jaillet@wanadoo.fr/
for an incomplete patch sent last year and Dan's comment on it.
---
 sound/soc/codecs/da7219.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c
index 50ecf30e6136..4746c8700451 100644
--- a/sound/soc/codecs/da7219.c
+++ b/sound/soc/codecs/da7219.c
@@ -2196,6 +2196,7 @@ static int da7219_register_dai_clks(struct snd_soc_component *component)
 			dai_clk_lookup = clkdev_hw_create(dai_clk_hw, init.name,
 							  "%s", dev_name(dev));
 			if (!dai_clk_lookup) {
+				clk_hw_unregister(dai_clk_hw);
 				ret = -ENOMEM;
 				goto err;
 			} else {
@@ -2217,12 +2218,12 @@ static int da7219_register_dai_clks(struct snd_soc_component *component)
 	return 0;
 
 err:
-	do {
+	while (--i >= 0) {
 		if (da7219->dai_clks_lookup[i])
 			clkdev_drop(da7219->dai_clks_lookup[i]);
 
 		clk_hw_unregister(&da7219->dai_clks_hw[i]);
-	} while (i-- > 0);
+	}
 
 	if (np)
 		kfree(da7219->clk_hw_data);
-- 
2.34.1


             reply	other threads:[~2022-09-22 19:45 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-22 19:44 Christophe JAILLET [this message]
2022-09-22 19:44 ` [PATCH] ASoC: da7219: Fix an error handling path in da7219_register_dai_clks() Christophe JAILLET
2022-09-23  9:42 ` Dan Carpenter
2022-09-23  9:42   ` Dan Carpenter
2022-09-27 10:34 ` Mark Brown
2022-09-27 10:34   ` Mark Brown

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