On Wed, May 13, 2020 at 10:40:04AM +0530, Arun Kumar Neelakantam wrote:
> From: Chris Lew <clew@xxxxxxxxxxxxxx>
>
> RPMSG provides a char device interface to userspace. Probe the rpmsg
> chrdev channel to enable the rpmsg_ctrl device creation on glink
> transports.
>
> Signed-off-by: Chris Lew <clew@xxxxxxxxxxxxxx>
> Signed-off-by: Arun Kumar Neelakantam <aneela@xxxxxxxxxxxxxx>
> ---
> drivers/rpmsg/qcom_glink_native.c | 40 ++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 39 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
> index 604f11f..3a7f87c 100644
> --- a/drivers/rpmsg/qcom_glink_native.c
> +++ b/drivers/rpmsg/qcom_glink_native.c
> @@ -1178,7 +1178,7 @@ static int qcom_glink_announce_create(struct rpmsg_device *rpdev)
> __be32 *val = defaults;
> int size;
>
> - if (glink->intentless)
> + if (glink->intentless || !completion_done(&channel->open_ack))
Please move this to patch 01.
> return 0;
>
> prop = of_find_property(np, "qcom,intents", NULL);
> @@ -1574,6 +1574,40 @@ static void qcom_glink_cancel_rx_work(struct qcom_glink *glink)
> kfree(dcmd);
> }
>
> +static void qcom_glink_device_release(struct device *dev)
> +{
> + struct rpmsg_device *rpdev = to_rpmsg_device(dev);
> + struct glink_channel *channel = to_glink_channel(rpdev->ept);
> +
> + /* Release qcom_glink_alloc_channel() reference */
> + kref_put(&channel->refcount, qcom_glink_channel_release);
> + kfree(rpdev);
> +}
> +
> +static int qcom_glink_create_chrdev(struct qcom_glink *glink)
> +{
> + struct rpmsg_device *rpdev;
> + struct glink_channel *channel;
> +
> + rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL);
> + if (!rpdev)
> + return -ENOMEM;
> +
> + channel = qcom_glink_alloc_channel(glink, "rpmsg_chrdev");
> + if (IS_ERR(channel)) {
> + kfree(rpdev);
> + return PTR_ERR(channel);
> + }
> + channel->rpdev = rpdev;
> +
> + rpdev->ept = &channel->ept;
> + rpdev->ops = &glink_device_ops;
> + rpdev->dev.parent = glink->dev;
> + rpdev->dev.release = qcom_glink_device_release;
> +
> + return rpmsg_chrdev_register_device(rpdev);
> +}
> +
> struct qcom_glink *qcom_glink_native_probe(struct device *dev,
> unsigned long features,
> struct qcom_glink_pipe *rx,
> @@ -1633,6 +1667,10 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
> if (ret)
> return ERR_PTR(ret);
>
> + ret = qcom_glink_create_chrdev(glink);
> + if (ret)
> + dev_err(glink->dev, "failed to register chrdev\n");
> +
> return glink;
> }
> EXPORT_SYMBOL_GPL(qcom_glink_native_probe);
> --
> 2.7.4
