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* [PATCH] ASoC: tegra: fix device_node refcounting
@ 2018-06-15 22:22 ` Alexey Khoroshilov
  0 siblings, 0 replies; 7+ messages in thread
From: Alexey Khoroshilov @ 2018-06-15 22:22 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown, Jaroslav Kysela, Takashi Iwai
  Cc: ldv-project, alsa-devel, sil2review, linux-kernel, Julia Lawall,
	linux-tegra, Alexey Khoroshilov

tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
but there is no release of them.

The patch adds the release to tegra_rt5677_remove() and
to error handling paths in the probe.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
 sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
index 0e4805c7b4ca..7081f15302cc 100644
--- a/sound/soc/tegra/tegra_rt5677.c
+++ b/sound/soc/tegra/tegra_rt5677.c
@@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
 
 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 	if (ret)
-		goto err;
+		goto err_put_cpu_of_node;
 
 	ret = snd_soc_register_card(card);
 	if (ret) {
@@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
 
 err_fini_utils:
 	tegra_asoc_utils_fini(&machine->util_data);
+err_put_cpu_of_node:
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+	tegra_rt5677_dai.platform_of_node = NULL;
+err_put_codec_of_node:
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
 err:
 	return ret;
 }
@@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
 
 	tegra_asoc_utils_fini(&machine->util_data);
 
+	tegra_rt5677_dai.platform_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+
 	return 0;
 }
 
-- 
2.7.4

^ permalink raw reply related	[flat|nested] 7+ messages in thread
* [PATCH] ASoC: tegra: fix device_node refcounting
@ 2018-06-15 22:22 ` Alexey Khoroshilov
  0 siblings, 0 replies; 7+ messages in thread
From: Alexey Khoroshilov @ 2018-06-15 22:22 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown, Jaroslav Kysela, Takashi Iwai
  Cc: Alexey Khoroshilov, alsa-devel, linux-tegra, linux-kernel,
	ldv-project, Julia Lawall, sil2review

tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
but there is no release of them.

The patch adds the release to tegra_rt5677_remove() and
to error handling paths in the probe.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
 sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
index 0e4805c7b4ca..7081f15302cc 100644
--- a/sound/soc/tegra/tegra_rt5677.c
+++ b/sound/soc/tegra/tegra_rt5677.c
@@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
 
 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 	if (ret)
-		goto err;
+		goto err_put_cpu_of_node;
 
 	ret = snd_soc_register_card(card);
 	if (ret) {
@@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
 
 err_fini_utils:
 	tegra_asoc_utils_fini(&machine->util_data);
+err_put_cpu_of_node:
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+	tegra_rt5677_dai.platform_of_node = NULL;
+err_put_codec_of_node:
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
 err:
 	return ret;
 }
@@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
 
 	tegra_asoc_utils_fini(&machine->util_data);
 
+	tegra_rt5677_dai.platform_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+
 	return 0;
 }
 
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 7+ messages in thread
* Re: [SIL2review] [PATCH] ASoC: tegra: fix device_node refcounting
  2018-06-15 22:22 ` Alexey Khoroshilov
@ 2018-06-17  8:02   ` Nicholas Mc Guire
  -1 siblings, 0 replies; 7+ messages in thread
From: Nicholas Mc Guire @ 2018-06-17  8:02 UTC (permalink / raw)
  To: Alexey Khoroshilov
  Cc: ldv-project, alsa-devel, sil2review, Takashi Iwai, Liam Girdwood,
	Julia Lawall, Mark Brown, linux-tegra, linux-kernel

On Sat, Jun 16, 2018 at 01:22:58AM +0300, Alexey Khoroshilov wrote:
> tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
> but there is no release of them.
> 
> The patch adds the release to tegra_rt5677_remove() and
> to error handling paths in the probe.
> 
> Found by Linux Driver Verification project (linuxtesting.org).

static int tegra_rt5677_probe(struct platform_device *pdev)
{
        struct device_node *np = pdev->dev.of_node;

 calls of_get_named_gpio() three times and then checks for 
 -EPROBE_DEFER and bails out in that error cases. but of_get_named_gpio()
 may have incremented  np  at that point. The call try i think is:

 of_get_named_gpio(np,....) 
  -> of_get_named_gpio_flags()
    -> of_get_named_gpiod_flags()
      -> of_parse_phandle_with_args_map()
        -> of_for_each_phandle()
          -> of_phandle_iterator_next()
            -> of_find_node_by_phandle()
              -> of_node_get(np)

 so that got refcounted as well and not decremented/released in the
 non -EPROBE_DEFER case. I think those should be added while cleaning
 up the other missing of_node_put() you detected below.

 I think thos of_node_put() are also missing.

> 
> Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Nicholas Mc Guire <der.herr@hofr.at>

> ---
>  sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
> index 0e4805c7b4ca..7081f15302cc 100644
> --- a/sound/soc/tegra/tegra_rt5677.c
> +++ b/sound/soc/tegra/tegra_rt5677.c
> @@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
>  
>  	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
>  	if (ret)
> -		goto err;
> +		goto err_put_cpu_of_node;
>  
>  	ret = snd_soc_register_card(card);
>  	if (ret) {
> @@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
>  
>  err_fini_utils:
>  	tegra_asoc_utils_fini(&machine->util_data);
> +err_put_cpu_of_node:
> +	of_node_put(tegra_rt5677_dai.cpu_of_node);
> +	tegra_rt5677_dai.cpu_of_node = NULL;
> +	tegra_rt5677_dai.platform_of_node = NULL;
> +err_put_codec_of_node:
> +	of_node_put(tegra_rt5677_dai.codec_of_node);
> +	tegra_rt5677_dai.codec_of_node = NULL;
>  err:
>  	return ret;
>  }
> @@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
>  
>  	tegra_asoc_utils_fini(&machine->util_data);
>  
> +	tegra_rt5677_dai.platform_of_node = NULL;
> +	of_node_put(tegra_rt5677_dai.codec_of_node);
> +	tegra_rt5677_dai.codec_of_node = NULL;
> +	of_node_put(tegra_rt5677_dai.cpu_of_node);
> +	tegra_rt5677_dai.cpu_of_node = NULL;
> +
>  	return 0;
>  }
>  
> -- 
> 2.7.4
> 
> _______________________________________________
> SIL2review mailing list
> SIL2review@lists.osadl.org
> https://lists.osadl.org/mailman/listinfo/sil2review

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [SIL2review] [PATCH] ASoC: tegra: fix device_node refcounting
@ 2018-06-17  8:02   ` Nicholas Mc Guire
  0 siblings, 0 replies; 7+ messages in thread
From: Nicholas Mc Guire @ 2018-06-17  8:02 UTC (permalink / raw)
  To: Alexey Khoroshilov
  Cc: Liam Girdwood, Mark Brown, Jaroslav Kysela, Takashi Iwai,
	ldv-project, alsa-devel, sil2review, linux-kernel, Julia Lawall,
	linux-tegra

On Sat, Jun 16, 2018 at 01:22:58AM +0300, Alexey Khoroshilov wrote:
> tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
> but there is no release of them.
> 
> The patch adds the release to tegra_rt5677_remove() and
> to error handling paths in the probe.
> 
> Found by Linux Driver Verification project (linuxtesting.org).

static int tegra_rt5677_probe(struct platform_device *pdev)
{
        struct device_node *np = pdev->dev.of_node;

 calls of_get_named_gpio() three times and then checks for 
 -EPROBE_DEFER and bails out in that error cases. but of_get_named_gpio()
 may have incremented  np  at that point. The call try i think is:

 of_get_named_gpio(np,....) 
  -> of_get_named_gpio_flags()
    -> of_get_named_gpiod_flags()
      -> of_parse_phandle_with_args_map()
        -> of_for_each_phandle()
          -> of_phandle_iterator_next()
            -> of_find_node_by_phandle()
              -> of_node_get(np)

 so that got refcounted as well and not decremented/released in the
 non -EPROBE_DEFER case. I think those should be added while cleaning
 up the other missing of_node_put() you detected below.

 I think thos of_node_put() are also missing.

> 
> Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Nicholas Mc Guire <der.herr@hofr.at>

> ---
>  sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
> index 0e4805c7b4ca..7081f15302cc 100644
> --- a/sound/soc/tegra/tegra_rt5677.c
> +++ b/sound/soc/tegra/tegra_rt5677.c
> @@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
>  
>  	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
>  	if (ret)
> -		goto err;
> +		goto err_put_cpu_of_node;
>  
>  	ret = snd_soc_register_card(card);
>  	if (ret) {
> @@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
>  
>  err_fini_utils:
>  	tegra_asoc_utils_fini(&machine->util_data);
> +err_put_cpu_of_node:
> +	of_node_put(tegra_rt5677_dai.cpu_of_node);
> +	tegra_rt5677_dai.cpu_of_node = NULL;
> +	tegra_rt5677_dai.platform_of_node = NULL;
> +err_put_codec_of_node:
> +	of_node_put(tegra_rt5677_dai.codec_of_node);
> +	tegra_rt5677_dai.codec_of_node = NULL;
>  err:
>  	return ret;
>  }
> @@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
>  
>  	tegra_asoc_utils_fini(&machine->util_data);
>  
> +	tegra_rt5677_dai.platform_of_node = NULL;
> +	of_node_put(tegra_rt5677_dai.codec_of_node);
> +	tegra_rt5677_dai.codec_of_node = NULL;
> +	of_node_put(tegra_rt5677_dai.cpu_of_node);
> +	tegra_rt5677_dai.cpu_of_node = NULL;
> +
>  	return 0;
>  }
>  
> -- 
> 2.7.4
> 
> _______________________________________________
> SIL2review mailing list
> SIL2review@lists.osadl.org
> https://lists.osadl.org/mailman/listinfo/sil2review

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Applied "ASoC: tegra: fix device_node refcounting" to the asoc tree
  2018-06-15 22:22 ` Alexey Khoroshilov
  (?)
@ 2018-06-18 11:59   ` Mark Brown
  -1 siblings, 0 replies; 7+ messages in thread
From: Mark Brown @ 2018-06-18 11:59 UTC (permalink / raw)
  To: Alexey Khoroshilov; +Cc: Mark Brown, Liam Girdwood

The patch

   ASoC: tegra: fix device_node refcounting

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From 7c5dfd549617b87db8e891ff4ecaa4a582b6c4cc Mon Sep 17 00:00:00 2001
From: Alexey Khoroshilov <khoroshilov@ispras.ru>
Date: Sat, 16 Jun 2018 01:22:58 +0300
Subject: [PATCH] ASoC: tegra: fix device_node refcounting

tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
but there is no release of them.

The patch adds the release to tegra_rt5677_remove() and
to error handling paths in the probe.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
index 0e4805c7b4ca..7081f15302cc 100644
--- a/sound/soc/tegra/tegra_rt5677.c
+++ b/sound/soc/tegra/tegra_rt5677.c
@@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
 
 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 	if (ret)
-		goto err;
+		goto err_put_cpu_of_node;
 
 	ret = snd_soc_register_card(card);
 	if (ret) {
@@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
 
 err_fini_utils:
 	tegra_asoc_utils_fini(&machine->util_data);
+err_put_cpu_of_node:
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+	tegra_rt5677_dai.platform_of_node = NULL;
+err_put_codec_of_node:
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
 err:
 	return ret;
 }
@@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
 
 	tegra_asoc_utils_fini(&machine->util_data);
 
+	tegra_rt5677_dai.platform_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+
 	return 0;
 }
 
-- 
2.17.1

^ permalink raw reply related	[flat|nested] 7+ messages in thread
* Applied "ASoC: tegra: fix device_node refcounting" to the asoc tree
@ 2018-06-18 11:59   ` Mark Brown
  0 siblings, 0 replies; 7+ messages in thread
From: Mark Brown @ 2018-06-18 11:59 UTC (permalink / raw)
  To: Alexey Khoroshilov
  Cc: Mark Brown, Liam Girdwood, Mark Brown, Jaroslav Kysela,
	Takashi Iwai, ldv-project, alsa-devel, sil2review, linux-kernel,
	Julia Lawall, linux-tegra, alsa-devel

The patch

   ASoC: tegra: fix device_node refcounting

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From 7c5dfd549617b87db8e891ff4ecaa4a582b6c4cc Mon Sep 17 00:00:00 2001
From: Alexey Khoroshilov <khoroshilov@ispras.ru>
Date: Sat, 16 Jun 2018 01:22:58 +0300
Subject: [PATCH] ASoC: tegra: fix device_node refcounting

tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
but there is no release of them.

The patch adds the release to tegra_rt5677_remove() and
to error handling paths in the probe.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
index 0e4805c7b4ca..7081f15302cc 100644
--- a/sound/soc/tegra/tegra_rt5677.c
+++ b/sound/soc/tegra/tegra_rt5677.c
@@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
 
 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 	if (ret)
-		goto err;
+		goto err_put_cpu_of_node;
 
 	ret = snd_soc_register_card(card);
 	if (ret) {
@@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
 
 err_fini_utils:
 	tegra_asoc_utils_fini(&machine->util_data);
+err_put_cpu_of_node:
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+	tegra_rt5677_dai.platform_of_node = NULL;
+err_put_codec_of_node:
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
 err:
 	return ret;
 }
@@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
 
 	tegra_asoc_utils_fini(&machine->util_data);
 
+	tegra_rt5677_dai.platform_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+
 	return 0;
 }
 
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 7+ messages in thread
* Applied "ASoC: tegra: fix device_node refcounting" to the asoc tree
@ 2018-06-18 11:59   ` Mark Brown
  0 siblings, 0 replies; 7+ messages in thread
From: Mark Brown @ 2018-06-18 11:59 UTC (permalink / raw)
  To: Alexey Khoroshilov; +Cc: Mark Brown, Liam Girdwood

The patch

   ASoC: tegra: fix device_node refcounting

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 7c5dfd549617b87db8e891ff4ecaa4a582b6c4cc Mon Sep 17 00:00:00 2001
From: Alexey Khoroshilov <khoroshilov@ispras.ru>
Date: Sat, 16 Jun 2018 01:22:58 +0300
Subject: [PATCH] ASoC: tegra: fix device_node refcounting

tegra_rt5677_probe() gets a couple of device nodes with of_parse_phandle(),
but there is no release of them.

The patch adds the release to tegra_rt5677_remove() and
to error handling paths in the probe.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra_rt5677.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra_rt5677.c b/sound/soc/tegra/tegra_rt5677.c
index 0e4805c7b4ca..7081f15302cc 100644
--- a/sound/soc/tegra/tegra_rt5677.c
+++ b/sound/soc/tegra/tegra_rt5677.c
@@ -264,13 +264,13 @@ static int tegra_rt5677_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_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
 
 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 	if (ret)
-		goto err;
+		goto err_put_cpu_of_node;
 
 	ret = snd_soc_register_card(card);
 	if (ret) {
@@ -283,6 +283,13 @@ static int tegra_rt5677_probe(struct platform_device *pdev)
 
 err_fini_utils:
 	tegra_asoc_utils_fini(&machine->util_data);
+err_put_cpu_of_node:
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+	tegra_rt5677_dai.platform_of_node = NULL;
+err_put_codec_of_node:
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
 err:
 	return ret;
 }
@@ -296,6 +303,12 @@ static int tegra_rt5677_remove(struct platform_device *pdev)
 
 	tegra_asoc_utils_fini(&machine->util_data);
 
+	tegra_rt5677_dai.platform_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.codec_of_node);
+	tegra_rt5677_dai.codec_of_node = NULL;
+	of_node_put(tegra_rt5677_dai.cpu_of_node);
+	tegra_rt5677_dai.cpu_of_node = NULL;
+
 	return 0;
 }
 
-- 
2.17.1

^ permalink raw reply related	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2018-06-18 12:00 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-06-15 22:22 [PATCH] ASoC: tegra: fix device_node refcounting Alexey Khoroshilov
2018-06-15 22:22 ` Alexey Khoroshilov
2018-06-17  8:02 ` [SIL2review] " Nicholas Mc Guire
2018-06-17  8:02   ` Nicholas Mc Guire
2018-06-18 11:59 ` Applied "ASoC: tegra: fix device_node refcounting" to the asoc tree Mark Brown
2018-06-18 11:59   ` Mark Brown
2018-06-18 11:59   ` Mark Brown

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