From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH v3 2/2] ethdev: add hierarchical scheduler API
Date: Mon, 6 Mar 2017 08:15:13 -0800
Message-ID: <20170306081513.50e46da8@xeon-e3>
References: <1488589820-206947-1-git-send-email-cristian.dumitrescu@intel.com>
 <1488589820-206947-3-git-send-email-cristian.dumitrescu@intel.com>
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Cc: dev@dpdk.org, thomas.monjalon@6wind.com, jerin.jacob@caviumnetworks.com,
 balasubramanian.manoharan@cavium.com, hemant.agrawal@nxp.com,
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To: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
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On Sat,  4 Mar 2017 01:10:20 +0000
Cristian Dumitrescu <cristian.dumitrescu@intel.com> wrote:

> +/* Get generic traffic manager operations structure from a port. */
> +const struct rte_tm_ops *
> +rte_tm_ops_get(uint8_t port_id, struct rte_tm_error *error)
> +{
> +	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
> +	const struct rte_tm_ops *ops;
> +
> +	if (!rte_eth_dev_is_valid_port(port_id)) {
> +		rte_tm_error_set(error,
> +			ENODEV,
> +			RTE_TM_ERROR_TYPE_UNSPECIFIED,
> +			NULL,
> +			rte_strerror(ENODEV));
> +		return NULL;
> +	}
> +
> +	if ((dev->dev_ops->cap_ops_get == NULL) ||
> +		(dev->dev_ops->cap_ops_get(dev, RTE_ETH_CAPABILITY_TM,
> +		&ops) != 0) || (ops == NULL)) {
> +		rte_tm_error_set(error,
> +			ENOSYS,
> +			RTE_TM_ERROR_TYPE_UNSPECIFIED,
> +			NULL,
> +			rte_strerror(ENOSYS));
> +		return NULL;
> +	}
> +
> +	return ops;
> +}

Why are you introducing yet another version of errno? There already is
rte_errno for RTE specific errors.