Re: [PATCH v5 13/16] rpmsg: char: introduce __rpmsg_chrdev_create_eptdev function

Mathieu Poirier
2021-03-04T18:56:19Z

On Fri, Feb 19, 2021 at 12:14:58PM +0100, Arnaud Pouliquen wrote:
> Introduce the __rpmsg_chrdev_create_eptdev internal function that returns
> the rpmsg_eptdev context structure.
> This patch prepares the introduction of a RPMsg device for the
> char device. the RPMsg device will need a reference to the context.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
> drivers/rpmsg/rpmsg_char.c | 23 ++++++++++++++++++-----
> 1 file changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
> index 09ae1304837c..66dcb8845d6c 100644
> --- a/drivers/rpmsg/rpmsg_char.c
> +++ b/drivers/rpmsg/rpmsg_char.c
> @@ -328,8 +328,9 @@ int rpmsg_chrdev_eptdev_destroy(struct device *dev, void *data)
> }
> EXPORT_SYMBOL(rpmsg_chrdev_eptdev_destroy);
>
> -int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> - struct rpmsg_channel_info chinfo)
> +static struct rpmsg_eptdev *__rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev,
> + struct device *parent,
> + struct rpmsg_channel_info chinfo)
> {
> struct rpmsg_eptdev *eptdev;
> struct device *dev;
> @@ -337,7 +338,7 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent
>
> eptdev = kzalloc(sizeof(*eptdev), GFP_KERNEL);
> if (!eptdev)
> - return -ENOMEM;
> + return ERR_PTR(-ENOMEM);
>
> dev = &eptdev->dev;
> eptdev->rpdev = rpdev;
> @@ -381,7 +382,7 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent
> put_device(dev);
> }
>
> - return ret;
> + return eptdev;
>
> free_ept_ida:
> ida_simple_remove(&rpmsg_ept_ida, dev->id);
> @@ -391,7 +392,19 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent
> put_device(dev);
> kfree(eptdev);
>
> - return ret;
> + return ERR_PTR(ret);
> +}
> +
> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> + struct rpmsg_channel_info chinfo)
> +{
> + struct rpmsg_eptdev *eptdev;
> +
> + eptdev = __rpmsg_chrdev_create_eptdev(rpdev, &rpdev->dev, chinfo);

Shouldn't the second argument to __rpmsg_chrdev_create_eptdev() be @parent?

> + if (IS_ERR(eptdev))
> + return PTR_ERR(eptdev);
> +
> + return 0;
> }
> EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev);
>
> --
> 2.17.1
>