| Message ID | 20210112132339.5621-14-ezequiel@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | V4L2 Async notifier API cleanup | expand |
Hi Ezequiel, Thank you for the patch. On Tue, Jan 12, 2021 at 10:23:39AM -0300, Ezequiel Garcia wrote: > Most -if not all- use-cases are expected to be covered by one of: > v4l2_async_notifier_add_fwnode_subdev, > v4l2_async_notifier_add_fwnode_remote_subdev, > v4l2_async_notifier_add_i2c_subdev or > v4l2_async_notifier_add_devname_subdev. > > We'd like to discourage drivers from using v4l2_async_notifier_add_subdev, > so rename it as __v4l2_async_notifier_add_subdev. This is > typically a good hint for drivers to avoid using the function. > > Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> > --- > drivers/media/v4l2-core/v4l2-async.c | 10 +++++----- > drivers/media/v4l2-core/v4l2-fwnode.c | 2 +- > include/media/v4l2-async.h | 10 ++++++++-- > 3 files changed, 14 insertions(+), 8 deletions(-) > > diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c > index b325bacddff4..e8e690280922 100644 > --- a/drivers/media/v4l2-core/v4l2-async.c > +++ b/drivers/media/v4l2-core/v4l2-async.c > @@ -630,7 +630,7 @@ void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier) > } > EXPORT_SYMBOL_GPL(v4l2_async_notifier_cleanup); > > -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > struct v4l2_async_subdev *asd) > { > int ret; > @@ -647,7 +647,7 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > mutex_unlock(&list_lock); > return ret; > } > -EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev); > +EXPORT_SYMBOL_GPL(__v4l2_async_notifier_add_subdev); > > struct v4l2_async_subdev * > v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, > @@ -664,7 +664,7 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, > asd->match_type = V4L2_ASYNC_MATCH_FWNODE; > asd->match.fwnode = fwnode_handle_get(fwnode); > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > if (ret) { > fwnode_handle_put(fwnode); > kfree(asd); > @@ -714,7 +714,7 @@ v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier, > asd->match.i2c.adapter_id = adapter_id; > asd->match.i2c.address = address; > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > if (ret) { > kfree(asd); > return ERR_PTR(ret); > @@ -739,7 +739,7 @@ v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier, > asd->match_type = V4L2_ASYNC_MATCH_DEVNAME; > asd->match.device_name = device_name; > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > if (ret) { > kfree(asd); > return ERR_PTR(ret); > diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c > index 5353e37eb950..919fde20032e 100644 > --- a/drivers/media/v4l2-core/v4l2-fwnode.c > +++ b/drivers/media/v4l2-core/v4l2-fwnode.c > @@ -833,7 +833,7 @@ v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev, > if (ret < 0) > goto out_err; > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > if (ret < 0) { > /* not an error if asd already exists */ > if (ret == -EEXIST) I wonder if v4l2-fwnode should be moved to videodev-objs in the Makefile, we could then avoid exporting __v4l2_async_notifier_add_subdev(). This doesn't need to be fixed here, Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h > index 1278f98355a7..9cf83f1ecca6 100644 > --- a/include/media/v4l2-async.h > +++ b/include/media/v4l2-async.h > @@ -161,17 +161,23 @@ void v4l2_async_debug_init(struct dentry *debugfs_dir); > void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier); > > /** > - * v4l2_async_notifier_add_subdev - Add an async subdev to the > + * __v4l2_async_notifier_add_subdev - Add an async subdev to the > * notifier's master asd list. > * > * @notifier: pointer to &struct v4l2_async_notifier > * @asd: pointer to &struct v4l2_async_subdev > * > + * \warning: Drivers should avoid using this function and instead use one of: > + * @v4l2_async_notifier_add_fwnode_subdev, > + * @v4l2_async_notifier_add_fwnode_remote_subdev, > + * @v4l2_async_notifier_add_i2c_subdev or > + * @v4l2_async_notifier_add_devname_subdev. > + * > * Call this function before registering a notifier to link the provided @asd to > * the notifiers master @asd_list. The @asd must be allocated with k*alloc() as > * it will be freed by the framework when the notifier is destroyed. > */ > -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > struct v4l2_async_subdev *asd); > > /**
Hi Laurent, On Thu, 2021-01-14 at 04:27 +0200, Laurent Pinchart wrote: > Hi Ezequiel, > > Thank you for the patch. > > On Tue, Jan 12, 2021 at 10:23:39AM -0300, Ezequiel Garcia wrote: > > Most -if not all- use-cases are expected to be covered by one of: > > v4l2_async_notifier_add_fwnode_subdev, > > v4l2_async_notifier_add_fwnode_remote_subdev, > > v4l2_async_notifier_add_i2c_subdev or > > v4l2_async_notifier_add_devname_subdev. > > > > We'd like to discourage drivers from using v4l2_async_notifier_add_subdev, > > so rename it as __v4l2_async_notifier_add_subdev. This is > > typically a good hint for drivers to avoid using the function. > > > > Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> > > --- > > drivers/media/v4l2-core/v4l2-async.c | 10 +++++----- > > drivers/media/v4l2-core/v4l2-fwnode.c | 2 +- > > include/media/v4l2-async.h | 10 ++++++++-- > > 3 files changed, 14 insertions(+), 8 deletions(-) > > > > diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c > > index b325bacddff4..e8e690280922 100644 > > --- a/drivers/media/v4l2-core/v4l2-async.c > > +++ b/drivers/media/v4l2-core/v4l2-async.c > > @@ -630,7 +630,7 @@ void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier) > > } > > EXPORT_SYMBOL_GPL(v4l2_async_notifier_cleanup); > > > > -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > struct v4l2_async_subdev *asd) > > { > > int ret; > > @@ -647,7 +647,7 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > mutex_unlock(&list_lock); > > return ret; > > } > > -EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev); > > +EXPORT_SYMBOL_GPL(__v4l2_async_notifier_add_subdev); > > > > struct v4l2_async_subdev * > > v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, > > @@ -664,7 +664,7 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, > > asd->match_type = V4L2_ASYNC_MATCH_FWNODE; > > asd->match.fwnode = fwnode_handle_get(fwnode); > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > if (ret) { > > fwnode_handle_put(fwnode); > > kfree(asd); > > @@ -714,7 +714,7 @@ v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier, > > asd->match.i2c.adapter_id = adapter_id; > > asd->match.i2c.address = address; > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > if (ret) { > > kfree(asd); > > return ERR_PTR(ret); > > @@ -739,7 +739,7 @@ v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier, > > asd->match_type = V4L2_ASYNC_MATCH_DEVNAME; > > asd->match.device_name = device_name; > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > if (ret) { > > kfree(asd); > > return ERR_PTR(ret); > > diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c > > index 5353e37eb950..919fde20032e 100644 > > --- a/drivers/media/v4l2-core/v4l2-fwnode.c > > +++ b/drivers/media/v4l2-core/v4l2-fwnode.c > > @@ -833,7 +833,7 @@ v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev, > > if (ret < 0) > > goto out_err; > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > if (ret < 0) { > > /* not an error if asd already exists */ > > if (ret == -EEXIST) > > I wonder if v4l2-fwnode should be moved to videodev-objs in the > Makefile, we could then avoid exporting > __v4l2_async_notifier_add_subdev(). This doesn't need to be fixed here, > Yeah, I thought about that, precisely to avoid the export and disallow any future users of v4l2_async_notifier_add_subdev. The impact of that is that we'd kill V4L2_FWNODE, increasing the size of videodev.ko, by a small fraction. Perhaps this is justified? I'm sure all the use-cases for this type of hardware won't care for 20 KiB more or less in the kernel payload. > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > > > diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h > > index 1278f98355a7..9cf83f1ecca6 100644 > > --- a/include/media/v4l2-async.h > > +++ b/include/media/v4l2-async.h > > @@ -161,17 +161,23 @@ void v4l2_async_debug_init(struct dentry *debugfs_dir); > > void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier); > > > > /** > > - * v4l2_async_notifier_add_subdev - Add an async subdev to the > > + * __v4l2_async_notifier_add_subdev - Add an async subdev to the > > * notifier's master asd list. > > * > > * @notifier: pointer to &struct v4l2_async_notifier > > * @asd: pointer to &struct v4l2_async_subdev > > * > > + * \warning: Drivers should avoid using this function and instead use one of: > > + * @v4l2_async_notifier_add_fwnode_subdev, > > + * @v4l2_async_notifier_add_fwnode_remote_subdev, > > + * @v4l2_async_notifier_add_i2c_subdev or > > + * @v4l2_async_notifier_add_devname_subdev. > > + * > > * Call this function before registering a notifier to link the provided @asd to > > * the notifiers master @asd_list. The @asd must be allocated with k*alloc() as > > * it will be freed by the framework when the notifier is destroyed. > > */ > > -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > struct v4l2_async_subdev *asd); > > > > /** > Thanks, Ezequiel
Hi Ezequiel, On Thu, Jan 14, 2021 at 10:47:08AM -0300, Ezequiel Garcia wrote: > On Thu, 2021-01-14 at 04:27 +0200, Laurent Pinchart wrote: > > On Tue, Jan 12, 2021 at 10:23:39AM -0300, Ezequiel Garcia wrote: > > > Most -if not all- use-cases are expected to be covered by one of: > > > v4l2_async_notifier_add_fwnode_subdev, > > > v4l2_async_notifier_add_fwnode_remote_subdev, > > > v4l2_async_notifier_add_i2c_subdev or > > > v4l2_async_notifier_add_devname_subdev. > > > > > > We'd like to discourage drivers from using v4l2_async_notifier_add_subdev, > > > so rename it as __v4l2_async_notifier_add_subdev. This is > > > typically a good hint for drivers to avoid using the function. > > > > > > Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> > > > --- > > > drivers/media/v4l2-core/v4l2-async.c | 10 +++++----- > > > drivers/media/v4l2-core/v4l2-fwnode.c | 2 +- > > > include/media/v4l2-async.h | 10 ++++++++-- > > > 3 files changed, 14 insertions(+), 8 deletions(-) > > > > > > diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c > > > index b325bacddff4..e8e690280922 100644 > > > --- a/drivers/media/v4l2-core/v4l2-async.c > > > +++ b/drivers/media/v4l2-core/v4l2-async.c > > > @@ -630,7 +630,7 @@ void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier) > > > } > > > EXPORT_SYMBOL_GPL(v4l2_async_notifier_cleanup); > > > > > > -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > > +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > > struct v4l2_async_subdev *asd) > > > { > > > int ret; > > > @@ -647,7 +647,7 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > > mutex_unlock(&list_lock); > > > return ret; > > > } > > > -EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev); > > > +EXPORT_SYMBOL_GPL(__v4l2_async_notifier_add_subdev); > > > > > > struct v4l2_async_subdev * > > > v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, > > > @@ -664,7 +664,7 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, > > > asd->match_type = V4L2_ASYNC_MATCH_FWNODE; > > > asd->match.fwnode = fwnode_handle_get(fwnode); > > > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > > if (ret) { > > > fwnode_handle_put(fwnode); > > > kfree(asd); > > > @@ -714,7 +714,7 @@ v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier, > > > asd->match.i2c.adapter_id = adapter_id; > > > asd->match.i2c.address = address; > > > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > > if (ret) { > > > kfree(asd); > > > return ERR_PTR(ret); > > > @@ -739,7 +739,7 @@ v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier, > > > asd->match_type = V4L2_ASYNC_MATCH_DEVNAME; > > > asd->match.device_name = device_name; > > > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > > if (ret) { > > > kfree(asd); > > > return ERR_PTR(ret); > > > diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c > > > index 5353e37eb950..919fde20032e 100644 > > > --- a/drivers/media/v4l2-core/v4l2-fwnode.c > > > +++ b/drivers/media/v4l2-core/v4l2-fwnode.c > > > @@ -833,7 +833,7 @@ v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev, > > > if (ret < 0) > > > goto out_err; > > > > > > - ret = v4l2_async_notifier_add_subdev(notifier, asd); > > > + ret = __v4l2_async_notifier_add_subdev(notifier, asd); > > > if (ret < 0) { > > > /* not an error if asd already exists */ > > > if (ret == -EEXIST) > > > > I wonder if v4l2-fwnode should be moved to videodev-objs in the > > Makefile, we could then avoid exporting > > __v4l2_async_notifier_add_subdev(). This doesn't need to be fixed here, > > > > Yeah, I thought about that, precisely to avoid the export and disallow > any future users of v4l2_async_notifier_add_subdev. > > The impact of that is that we'd kill V4L2_FWNODE, increasing the > size of videodev.ko, by a small fraction. We don't have to drop V4L2_FWNODE, we can still make v4l2-async.o conditional, even if it's included in videodev.ko. > Perhaps this is justified? I'm sure all the use-cases for this type > of hardware won't care for 20 KiB more or less in the kernel payload. > > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > > > > > diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h > > > index 1278f98355a7..9cf83f1ecca6 100644 > > > --- a/include/media/v4l2-async.h > > > +++ b/include/media/v4l2-async.h > > > @@ -161,17 +161,23 @@ void v4l2_async_debug_init(struct dentry *debugfs_dir); > > > void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier); > > > > > > /** > > > - * v4l2_async_notifier_add_subdev - Add an async subdev to the > > > + * __v4l2_async_notifier_add_subdev - Add an async subdev to the > > > * notifier's master asd list. > > > * > > > * @notifier: pointer to &struct v4l2_async_notifier > > > * @asd: pointer to &struct v4l2_async_subdev > > > * > > > + * \warning: Drivers should avoid using this function and instead use one of: > > > + * @v4l2_async_notifier_add_fwnode_subdev, > > > + * @v4l2_async_notifier_add_fwnode_remote_subdev, > > > + * @v4l2_async_notifier_add_i2c_subdev or > > > + * @v4l2_async_notifier_add_devname_subdev. > > > + * > > > * Call this function before registering a notifier to link the provided @asd to > > > * the notifiers master @asd_list. The @asd must be allocated with k*alloc() as > > > * it will be freed by the framework when the notifier is destroyed. > > > */ > > > -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > > +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, > > > struct v4l2_async_subdev *asd); > > > > > > /**
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index b325bacddff4..e8e690280922 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -630,7 +630,7 @@ void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier) } EXPORT_SYMBOL_GPL(v4l2_async_notifier_cleanup); -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, struct v4l2_async_subdev *asd) { int ret; @@ -647,7 +647,7 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, mutex_unlock(&list_lock); return ret; } -EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev); +EXPORT_SYMBOL_GPL(__v4l2_async_notifier_add_subdev); struct v4l2_async_subdev * v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, @@ -664,7 +664,7 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, asd->match_type = V4L2_ASYNC_MATCH_FWNODE; asd->match.fwnode = fwnode_handle_get(fwnode); - ret = v4l2_async_notifier_add_subdev(notifier, asd); + ret = __v4l2_async_notifier_add_subdev(notifier, asd); if (ret) { fwnode_handle_put(fwnode); kfree(asd); @@ -714,7 +714,7 @@ v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier, asd->match.i2c.adapter_id = adapter_id; asd->match.i2c.address = address; - ret = v4l2_async_notifier_add_subdev(notifier, asd); + ret = __v4l2_async_notifier_add_subdev(notifier, asd); if (ret) { kfree(asd); return ERR_PTR(ret); @@ -739,7 +739,7 @@ v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier, asd->match_type = V4L2_ASYNC_MATCH_DEVNAME; asd->match.device_name = device_name; - ret = v4l2_async_notifier_add_subdev(notifier, asd); + ret = __v4l2_async_notifier_add_subdev(notifier, asd); if (ret) { kfree(asd); return ERR_PTR(ret); diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index 5353e37eb950..919fde20032e 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -833,7 +833,7 @@ v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev, if (ret < 0) goto out_err; - ret = v4l2_async_notifier_add_subdev(notifier, asd); + ret = __v4l2_async_notifier_add_subdev(notifier, asd); if (ret < 0) { /* not an error if asd already exists */ if (ret == -EEXIST) diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index 1278f98355a7..9cf83f1ecca6 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -161,17 +161,23 @@ void v4l2_async_debug_init(struct dentry *debugfs_dir); void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier); /** - * v4l2_async_notifier_add_subdev - Add an async subdev to the + * __v4l2_async_notifier_add_subdev - Add an async subdev to the * notifier's master asd list. * * @notifier: pointer to &struct v4l2_async_notifier * @asd: pointer to &struct v4l2_async_subdev * + * \warning: Drivers should avoid using this function and instead use one of: + * @v4l2_async_notifier_add_fwnode_subdev, + * @v4l2_async_notifier_add_fwnode_remote_subdev, + * @v4l2_async_notifier_add_i2c_subdev or + * @v4l2_async_notifier_add_devname_subdev. + * * Call this function before registering a notifier to link the provided @asd to * the notifiers master @asd_list. The @asd must be allocated with k*alloc() as * it will be freed by the framework when the notifier is destroyed. */ -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier, struct v4l2_async_subdev *asd); /**
Most -if not all- use-cases are expected to be covered by one of: v4l2_async_notifier_add_fwnode_subdev, v4l2_async_notifier_add_fwnode_remote_subdev, v4l2_async_notifier_add_i2c_subdev or v4l2_async_notifier_add_devname_subdev. We'd like to discourage drivers from using v4l2_async_notifier_add_subdev, so rename it as __v4l2_async_notifier_add_subdev. This is typically a good hint for drivers to avoid using the function. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> --- drivers/media/v4l2-core/v4l2-async.c | 10 +++++----- drivers/media/v4l2-core/v4l2-fwnode.c | 2 +- include/media/v4l2-async.h | 10 ++++++++-- 3 files changed, 14 insertions(+), 8 deletions(-)