diff mbox

media: i2c: s5c73m3: make sure we destroy the mutex

Message ID 1425308434-26549-1-git-send-email-prabhakar.csengg@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Lad, Prabhakar March 2, 2015, 3 p.m. UTC
From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>

Make sure to call mutex_destroy() in case of probe failure or module
unload.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/i2c/s5c73m3/s5c73m3-core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Hans Verkuil March 3, 2015, 9:09 a.m. UTC | #1
On 03/02/2015 04:00 PM, Lad Prabhakar wrote:
> From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
> 
> Make sure to call mutex_destroy() in case of probe failure or module
> unload.

It's not actually necessary to destroy a mutex. Most drivers never do this.
It only helps a bit in debugging.

I'll delegate this patch to Kamil, and he can decide whether or not to apply
this.

Regards,

	Hans

> 
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> ---
>  drivers/media/i2c/s5c73m3/s5c73m3-core.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/i2c/s5c73m3/s5c73m3-core.c b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
> index ee0f57e..da0b3a3 100644
> --- a/drivers/media/i2c/s5c73m3/s5c73m3-core.c
> +++ b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
> @@ -1658,7 +1658,6 @@ static int s5c73m3_probe(struct i2c_client *client,
>  	if (ret < 0)
>  		return ret;
>  
> -	mutex_init(&state->lock);
>  	sd = &state->sensor_sd;
>  	oif_sd = &state->oif_sd;
>  
> @@ -1695,6 +1694,8 @@ static int s5c73m3_probe(struct i2c_client *client,
>  	if (ret < 0)
>  		return ret;
>  
> +	mutex_init(&state->lock);
> +
>  	ret = s5c73m3_configure_gpios(state);
>  	if (ret)
>  		goto out_err;
> @@ -1754,6 +1755,7 @@ out_err1:
>  	s5c73m3_unregister_spi_driver(state);
>  out_err:
>  	media_entity_cleanup(&sd->entity);
> +	mutex_destroy(&state->lock);
>  	return ret;
>  }
>  
> @@ -1772,6 +1774,7 @@ static int s5c73m3_remove(struct i2c_client *client)
>  	media_entity_cleanup(&sensor_sd->entity);
>  
>  	s5c73m3_unregister_spi_driver(state);
> +	mutex_destroy(&state->lock);
>  
>  	return 0;
>  }
> 

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Kamil Debski March 3, 2015, 2:38 p.m. UTC | #2
From: Hans Verkuil [mailto:hverkuil@xs4all.nl]
Sent: Tuesday, March 03, 2015 10:09 AM
> 
> On 03/02/2015 04:00 PM, Lad Prabhakar wrote:
> > From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
> >
> > Make sure to call mutex_destroy() in case of probe failure or module
> > unload.
> 
> It's not actually necessary to destroy a mutex. Most drivers never do
> this.
> It only helps a bit in debugging.
> 
> I'll delegate this patch to Kamil, and he can decide whether or not to
> apply this.

I agree with Hans here, the patch is not necessary.

> 
> Regards,
> 
> 	Hans
> 

Best wishes,
diff mbox

Patch

diff --git a/drivers/media/i2c/s5c73m3/s5c73m3-core.c b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
index ee0f57e..da0b3a3 100644
--- a/drivers/media/i2c/s5c73m3/s5c73m3-core.c
+++ b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
@@ -1658,7 +1658,6 @@  static int s5c73m3_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	mutex_init(&state->lock);
 	sd = &state->sensor_sd;
 	oif_sd = &state->oif_sd;
 
@@ -1695,6 +1694,8 @@  static int s5c73m3_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
+	mutex_init(&state->lock);
+
 	ret = s5c73m3_configure_gpios(state);
 	if (ret)
 		goto out_err;
@@ -1754,6 +1755,7 @@  out_err1:
 	s5c73m3_unregister_spi_driver(state);
 out_err:
 	media_entity_cleanup(&sd->entity);
+	mutex_destroy(&state->lock);
 	return ret;
 }
 
@@ -1772,6 +1774,7 @@  static int s5c73m3_remove(struct i2c_client *client)
 	media_entity_cleanup(&sensor_sd->entity);
 
 	s5c73m3_unregister_spi_driver(state);
+	mutex_destroy(&state->lock);
 
 	return 0;
 }