Em Wed, 03 Feb 2016 21:03:46 -0700
Shuah Khan <shuahkh@xxxxxxxxxxxxxxx> escreveu:
> Change au0828 to use Managed Media Controller API to
> share media device and coordinate creating/deleting
> the shared media device with the snd-usb-audio driver.
> The shared media device is created as device resource
> of the parent usb device of the two drivers.
>
> Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
> ---
> drivers/media/usb/au0828/au0828-core.c | 29 +++++++++++++++--------------
> 1 file changed, 15 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
> index df2bc3f..b8c4bdd 100644
> --- a/drivers/media/usb/au0828/au0828-core.c
> +++ b/drivers/media/usb/au0828/au0828-core.c
> @@ -134,10 +134,10 @@ static void au0828_unregister_media_device(struct au0828_dev *dev)
> {
>
> #ifdef CONFIG_MEDIA_CONTROLLER
> - if (dev->media_dev) {
> + if (dev->media_dev &&
> + media_devnode_is_registered(&dev->media_dev->devnode)) {
> media_device_unregister(dev->media_dev);
> media_device_cleanup(dev->media_dev);
> - kfree(dev->media_dev);
> dev->media_dev = NULL;
> }
> #endif
> @@ -223,23 +223,24 @@ static int au0828_media_device_init(struct au0828_dev *dev,
> #ifdef CONFIG_MEDIA_CONTROLLER
> struct media_device *mdev;
>
> - mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
> + mdev = media_device_get_devres(&udev->dev);
> if (!mdev)
> return -ENOMEM;
>
> - mdev->dev = &udev->dev;
> + if (!media_devnode_is_registered(&mdev->devnode)) {
> + mdev->dev = &udev->dev;
>
> - if (!dev->board.name)
> - strlcpy(mdev->model, "unknown au0828", sizeof(mdev->model));
> - else
> - strlcpy(mdev->model, dev->board.name, sizeof(mdev->model));
> - if (udev->serial)
> - strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
> - strcpy(mdev->bus_info, udev->devpath);
> - mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
> - mdev->driver_version = LINUX_VERSION_CODE;
> + if (udev->product)
> + strlcpy(mdev->model, udev->product,
> + sizeof(mdev->model));
Why did you change that? On some boards, udev->product doesn't reflect
the brand name, but have just some random generic data.
Also, as the other logs associated with the device uses dev->board.name,
we want the media controller to use the same name here. Ok, if this
is null, we could use udev->product as a replacement.
> + if (udev->serial)
> + strlcpy(mdev->serial, udev->serial,
> + sizeof(mdev->serial));
> + strcpy(mdev->bus_info, udev->devpath);
> + mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
>
> - media_device_init(mdev);
> + media_device_init(mdev);
> + }
>
> dev->media_dev = mdev;
> #endif
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