netdev - Re: [PATCH net-next v3 2/5] bus: fsl-mc: add the fsl_mc_get

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Date:   Tue, 29 Oct 2019 02:45:23 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Ioana Ciornei <ioana.ciornei@....com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        laurentiu.tudor@....com, f.fainelli@...il.com,
        linux@...linux.org.uk
Subject: Re: [PATCH net-next v3 2/5] bus: fsl-mc: add the fsl_mc_get_endpoint
 function

> +struct fsl_mc_device *fsl_mc_get_endpoint(struct fsl_mc_device *mc_dev)
> +{
> +	struct fsl_mc_device *mc_bus_dev, *endpoint;
> +	struct fsl_mc_obj_desc endpoint_desc = { 0 };
> +	struct dprc_endpoint endpoint1 = { 0 };
> +	struct dprc_endpoint endpoint2 = { 0 };
> +	int state, err;
> +
> +	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
> +	strcpy(endpoint1.type, mc_dev->obj_desc.type);
> +	endpoint1.id = mc_dev->obj_desc.id;
> +
> +	err = dprc_get_connection(mc_bus_dev->mc_io, 0,
> +				  mc_bus_dev->mc_handle,
> +				  &endpoint1, &endpoint2,
> +				  &state);
> +
> +	if (err == -ENOTCONN || state == -1)
> +		return NULL;
> +
> +	if (err < 0) {
> +		dev_err(&mc_bus_dev->dev, "dprc_get_connection() = %d\n", err);
> +		return NULL;
> +	}

You could return these errors with ERR_PRT(err)

    Andrew