From: Miaoqian Lin <linmq006@gmail.com> To: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, Nicolas Ferre <nicolas.ferre@microchip.com>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Claudiu Beznea <claudiu.beznea@microchip.com>, Richard Genoud <richard.genoud@gmail.com>, alsa-devel@alsa-project.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: linmq006@gmail.com Subject: [PATCH] ASoC: atmel: Fix error handling in sam9x5_wm8731_driver_probe Date: Wed, 16 Mar 2022 11:15:30 +0000 [thread overview] Message-ID: <20220316111530.4551-1-linmq006@gmail.com> (raw) The device_node pointer is returned by of_parse_phandle() with refcount incremented. We should use of_node_put() on it when done. This function only calls of_node_put() in the regular path. And it will cause refcount leak in error path. Fixes: fdbcb3cba54b ("ASoC: atmel: machine driver for at91sam9x5-wm8731 boards") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> --- sound/soc/atmel/sam9x5_wm8731.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/sound/soc/atmel/sam9x5_wm8731.c b/sound/soc/atmel/sam9x5_wm8731.c index 7c45dc4f8c1b..99310e40e7a6 100644 --- a/sound/soc/atmel/sam9x5_wm8731.c +++ b/sound/soc/atmel/sam9x5_wm8731.c @@ -142,7 +142,7 @@ static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) if (!cpu_np) { dev_err(&pdev->dev, "atmel,ssc-controller node missing\n"); ret = -EINVAL; - goto out; + goto out_put_codec_np; } dai->cpus->of_node = cpu_np; dai->platforms->of_node = cpu_np; @@ -153,12 +153,9 @@ static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) if (ret != 0) { dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n", ret, priv->ssc_id); - goto out; + goto out_put_cpu_np; } - of_node_put(codec_np); - of_node_put(cpu_np); - ret = devm_snd_soc_register_card(&pdev->dev, card); if (ret) { dev_err(&pdev->dev, "Platform device allocation failed\n"); @@ -167,10 +164,14 @@ static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) dev_dbg(&pdev->dev, "%s ok\n", __func__); - return ret; + goto out_put_cpu_np; out_put_audio: atmel_ssc_put_audio(priv->ssc_id); +out_put_cpu_np: + of_node_put(cpu_np); +out_put_codec_np: + of_node_put(codec_np); out: return ret; } -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Miaoqian Lin <linmq006@gmail.com> To: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, Nicolas Ferre <nicolas.ferre@microchip.com>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Claudiu Beznea <claudiu.beznea@microchip.com>, Richard Genoud <richard.genoud@gmail.com>, alsa-devel@alsa-project.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: linmq006@gmail.com Subject: [PATCH] ASoC: atmel: Fix error handling in sam9x5_wm8731_driver_probe Date: Wed, 16 Mar 2022 11:15:30 +0000 [thread overview] Message-ID: <20220316111530.4551-1-linmq006@gmail.com> (raw) The device_node pointer is returned by of_parse_phandle() with refcount incremented. We should use of_node_put() on it when done. This function only calls of_node_put() in the regular path. And it will cause refcount leak in error path. Fixes: fdbcb3cba54b ("ASoC: atmel: machine driver for at91sam9x5-wm8731 boards") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> --- sound/soc/atmel/sam9x5_wm8731.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/sound/soc/atmel/sam9x5_wm8731.c b/sound/soc/atmel/sam9x5_wm8731.c index 7c45dc4f8c1b..99310e40e7a6 100644 --- a/sound/soc/atmel/sam9x5_wm8731.c +++ b/sound/soc/atmel/sam9x5_wm8731.c @@ -142,7 +142,7 @@ static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) if (!cpu_np) { dev_err(&pdev->dev, "atmel,ssc-controller node missing\n"); ret = -EINVAL; - goto out; + goto out_put_codec_np; } dai->cpus->of_node = cpu_np; dai->platforms->of_node = cpu_np; @@ -153,12 +153,9 @@ static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) if (ret != 0) { dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n", ret, priv->ssc_id); - goto out; + goto out_put_cpu_np; } - of_node_put(codec_np); - of_node_put(cpu_np); - ret = devm_snd_soc_register_card(&pdev->dev, card); if (ret) { dev_err(&pdev->dev, "Platform device allocation failed\n"); @@ -167,10 +164,14 @@ static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) dev_dbg(&pdev->dev, "%s ok\n", __func__); - return ret; + goto out_put_cpu_np; out_put_audio: atmel_ssc_put_audio(priv->ssc_id); +out_put_cpu_np: + of_node_put(cpu_np); +out_put_codec_np: + of_node_put(codec_np); out: return ret; } -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-03-16 11:15 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-16 11:15 Miaoqian Lin [this message] 2022-03-16 11:15 ` [PATCH] ASoC: atmel: Fix error handling in sam9x5_wm8731_driver_probe Miaoqian Lin 2022-03-16 12:09 ` Codrin.Ciubotariu 2022-03-16 12:09 ` Codrin.Ciubotariu 2022-03-16 20:35 ` Mark Brown 2022-03-16 20:35 ` Mark Brown
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