Re: [PATCH] ASoC: tegra_alc5632: fix device_node refcounting

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello Alexey,

AFAICT, this looks right. It seems that *most* of the machine drivers (not only tegra) forget to decrease the refcount. I'm wondering why you didn't sent a series patch to fix them all at once?

Reviewed-by: Marc Dietrich <marvin24@xxxxxx>

Marc

On Sat, 28 Jul 2018, Alexey Khoroshilov wrote:

tegra_alc5632_probe() increments reference count of device nodes
with of_parse_phandle(), but there is no code decrementing them
in the driver.

The patch adds of_node_put() to tegra_alc5632_remove() and
to error handling paths in the probe.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
sound/soc/tegra/tegra_alc5632.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra_alc5632.c b/sound/soc/tegra/tegra_alc5632.c
index 5197d6b18cb6..98d87801d57a 100644
--- a/sound/soc/tegra/tegra_alc5632.c
+++ b/sound/soc/tegra/tegra_alc5632.c
@@ -190,14 +190,14 @@ static int tegra_alc5632_probe(struct platform_device *pdev)
		dev_err(&pdev->dev,
			"Property 'nvidia,i2s-controller' missing or invalid\n");
		ret = -EINVAL;
-		goto err;
+		goto err_put_codec_of_node;
	}

	tegra_alc5632_dai.platform_of_node = tegra_alc5632_dai.cpu_of_node;

	ret = tegra_asoc_utils_init(&alc5632->util_data, &pdev->dev);
	if (ret)
-		goto err;
+		goto err_put_cpu_of_node;

	ret = snd_soc_register_card(card);
	if (ret) {
@@ -210,6 +210,13 @@ static int tegra_alc5632_probe(struct platform_device *pdev)

err_fini_utils:
	tegra_asoc_utils_fini(&alc5632->util_data);
+err_put_cpu_of_node:
+	of_node_put(tegra_alc5632_dai.cpu_of_node);
+	tegra_alc5632_dai.cpu_of_node = NULL;
+	tegra_alc5632_dai.platform_of_node = NULL;
+err_put_codec_of_node:
+	of_node_put(tegra_alc5632_dai.codec_of_node);
+	tegra_alc5632_dai.codec_of_node = NULL;
err:
	return ret;
}
@@ -223,6 +230,12 @@ static int tegra_alc5632_remove(struct platform_device *pdev)

	tegra_asoc_utils_fini(&machine->util_data);

+	of_node_put(tegra_alc5632_dai.cpu_of_node);
+	tegra_alc5632_dai.cpu_of_node = NULL;
+	tegra_alc5632_dai.platform_of_node = NULL;
+	of_node_put(tegra_alc5632_dai.codec_of_node);
+	tegra_alc5632_dai.codec_of_node = NULL;
+
	return 0;
}

--
2.7.4

--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [ARM Kernel]     [Linux ARM]     [Linux ARM MSM]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux