linux-kernel - Re: [PATCH 10/10] rpmsg: ns: Make Name service module transport agnostic

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Date:   Wed, 30 Sep 2020 09:13:27 +0200
From:   Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     ohad@...ery.com, bjorn.andersson@...aro.org, loic.pallardy@...com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/10] rpmsg: ns: Make Name service module transport
 agnostic

On Mon, Sep 21, 2020 at 06:10:00PM -0600, Mathieu Poirier wrote:
> Make name service module transport agnostic by using the rpmsg
> device specific byte conversion routine.
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> ---
>  drivers/rpmsg/rpmsg_ns.c | 10 ++++------
>  include/linux/rpmsg_ns.h |  4 ++--
>  2 files changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/rpmsg/rpmsg_ns.c b/drivers/rpmsg/rpmsg_ns.c
> index b3318bf84433..1df3aaadfe10 100644
> --- a/drivers/rpmsg/rpmsg_ns.c
> +++ b/drivers/rpmsg/rpmsg_ns.c
> @@ -18,9 +18,7 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
>  	struct rpmsg_ns_msg *msg = data;
>  	struct rpmsg_device *newch;
>  	struct rpmsg_channel_info chinfo;
> -	struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
> -	struct virtproc_info *vrp = vch->vrp;
> -	struct device *dev = &vrp->vdev->dev;
> +	struct device *dev = &rpdev->dev;
>  	int ret;
>  
>  #if defined(CONFIG_DYNAMIC_DEBUG)
> @@ -38,13 +36,13 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
>  
>  	strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
>  	chinfo.src = RPMSG_ADDR_ANY;
> -	chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr);
> +	chinfo.dst = rpmsg32_to_cpu(rpdev, msg->addr);
>  
>  	dev_info(dev, "%sing channel %s addr 0x%x\n",
> -		 virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ?
> +		 rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY ?
>  		 "destroy" : "creat", msg->name, chinfo.dst);
>  
> -	if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) {
> +	if (rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY) {
>  		ret = rpmsg_release_channel(rpdev, &chinfo);
>  		if (ret)
>  			dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
> diff --git a/include/linux/rpmsg_ns.h b/include/linux/rpmsg_ns.h
> index aabc6c3c0d6d..9f3030b2145b 100644
> --- a/include/linux/rpmsg_ns.h
> +++ b/include/linux/rpmsg_ns.h
> @@ -41,8 +41,8 @@ struct rpmsg_hdr {
>   */
>  struct rpmsg_ns_msg {
>  	char name[RPMSG_NAME_SIZE];
> -	__virtio32 addr;
> -	__virtio32 flags;
> +	u32 addr;
> +	u32 flags;

These aren't (necessarily) native endianness, right? Don't they deserve a 
separate type? __rpmsg32?

Thanks
Guennadi

>  } __packed;
>  
>  /**
> -- 
> 2.25.1
>