* [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback
@ 2016-05-10 13:19 Alban Bedel
2016-05-10 18:45 ` Sakari Ailus
2016-05-10 21:42 ` Javier Martinez Canillas
0 siblings, 2 replies; 3+ messages in thread
From: Alban Bedel @ 2016-05-10 13:19 UTC (permalink / raw)
To: linux-media
Cc: Mauro Carvalho Chehab, Sakari Ailus, Javier Martinez Canillas,
Laurent Pinchart, linux-kernel, Alban Bedel
v4l2_async_cleanup() is always called before before calling the
unbind() callback. However v4l2_async_cleanup() clear the asd member,
so when calling the unbind() callback the v4l2_async_subdev is always
NULL. To fix this save the asd before calling v4l2_async_cleanup().
Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
---
drivers/media/v4l2-core/v4l2-async.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index a4b224d..ceb28d4 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -220,6 +220,7 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier)
list_del(¬ifier->list);
list_for_each_entry_safe(sd, tmp, ¬ifier->done, async_list) {
+ struct v4l2_async_subdev *asd = sd->asd;
struct device *d;
d = get_device(sd->dev);
@@ -230,7 +231,7 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier)
device_release_driver(d);
if (notifier->unbind)
- notifier->unbind(notifier, sd, sd->asd);
+ notifier->unbind(notifier, sd, asd);
/*
* Store device at the device cache, in order to call
@@ -313,6 +314,7 @@ EXPORT_SYMBOL(v4l2_async_register_subdev);
void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
{
struct v4l2_async_notifier *notifier = sd->notifier;
+ struct v4l2_async_subdev *asd = sd->asd;
if (!sd->asd) {
if (!list_empty(&sd->async_list))
@@ -327,7 +329,7 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
v4l2_async_cleanup(sd);
if (notifier->unbind)
- notifier->unbind(notifier, sd, sd->asd);
+ notifier->unbind(notifier, sd, asd);
mutex_unlock(&list_lock);
}
--
2.8.2
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback
2016-05-10 13:19 [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback Alban Bedel
@ 2016-05-10 18:45 ` Sakari Ailus
2016-05-10 21:42 ` Javier Martinez Canillas
1 sibling, 0 replies; 3+ messages in thread
From: Sakari Ailus @ 2016-05-10 18:45 UTC (permalink / raw)
To: Alban Bedel
Cc: linux-media, Mauro Carvalho Chehab, Javier Martinez Canillas,
Laurent Pinchart, linux-kernel
Hi Alban,
On Tue, May 10, 2016 at 03:19:14PM +0200, Alban Bedel wrote:
> v4l2_async_cleanup() is always called before before calling the
s/before //
> unbind() callback. However v4l2_async_cleanup() clear the asd member,
s/clear/clears/
> so when calling the unbind() callback the v4l2_async_subdev is always
> NULL. To fix this save the asd before calling v4l2_async_cleanup().
Oh dear...! How could this have happened? :-o
With the commit message changes,
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
>
> Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
> ---
> drivers/media/v4l2-core/v4l2-async.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
> index a4b224d..ceb28d4 100644
> --- a/drivers/media/v4l2-core/v4l2-async.c
> +++ b/drivers/media/v4l2-core/v4l2-async.c
> @@ -220,6 +220,7 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier)
> list_del(¬ifier->list);
>
> list_for_each_entry_safe(sd, tmp, ¬ifier->done, async_list) {
> + struct v4l2_async_subdev *asd = sd->asd;
> struct device *d;
>
> d = get_device(sd->dev);
> @@ -230,7 +231,7 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier)
> device_release_driver(d);
>
> if (notifier->unbind)
> - notifier->unbind(notifier, sd, sd->asd);
> + notifier->unbind(notifier, sd, asd);
>
> /*
> * Store device at the device cache, in order to call
> @@ -313,6 +314,7 @@ EXPORT_SYMBOL(v4l2_async_register_subdev);
> void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
> {
> struct v4l2_async_notifier *notifier = sd->notifier;
> + struct v4l2_async_subdev *asd = sd->asd;
>
> if (!sd->asd) {
> if (!list_empty(&sd->async_list))
> @@ -327,7 +329,7 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
> v4l2_async_cleanup(sd);
>
> if (notifier->unbind)
> - notifier->unbind(notifier, sd, sd->asd);
> + notifier->unbind(notifier, sd, asd);
>
> mutex_unlock(&list_lock);
> }
--
Kind regards,
Sakari Ailus
e-mail: sakari.ailus@iki.fi XMPP: sailus@retiisi.org.uk
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback
2016-05-10 13:19 [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback Alban Bedel
2016-05-10 18:45 ` Sakari Ailus
@ 2016-05-10 21:42 ` Javier Martinez Canillas
1 sibling, 0 replies; 3+ messages in thread
From: Javier Martinez Canillas @ 2016-05-10 21:42 UTC (permalink / raw)
To: Alban Bedel, linux-media
Cc: Mauro Carvalho Chehab, Sakari Ailus, Laurent Pinchart, linux-kernel
Hello Alban,
On 05/10/2016 09:19 AM, Alban Bedel wrote:
> v4l2_async_cleanup() is always called before before calling the
> unbind() callback. However v4l2_async_cleanup() clear the asd member,
> so when calling the unbind() callback the v4l2_async_subdev is always
> NULL. To fix this save the asd before calling v4l2_async_cleanup().
>
> Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
> ---
Patch looks good to me. So after fixing the issues pointed out by Sakari:
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-05-10 13:19 [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback Alban Bedel
2016-05-10 18:45 ` Sakari Ailus
2016-05-10 21:42 ` Javier Martinez Canillas
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