From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ferruh Yigit <ferruh.yigit@intel.com>
Subject: Re: [PATCH v3 11/25] mlx5: add support for configuration
 through kvargs
Date: Tue, 21 Jun 2016 17:42:42 +0100
Message-ID: <57696E82.20607@intel.com>
References: <1465379291-25310-1-git-send-email-nelio.laranjeiro@6wind.com>
 <1466493818-1877-12-git-send-email-nelio.laranjeiro@6wind.com>
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Cc: Adrien Mazarguil <adrien.mazarguil@6wind.com>
To: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>, dev@dpdk.org
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On 6/21/2016 8:23 AM, Nelio Laranjeiro wrote:
> The intent is to replace the remaining compile-time options and environ=
ment
> variables with a common mean of runtime configuration. This commit only
> adds the kvargs handling code, subsequent commits will update the rest.
>=20
> Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
> Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> ---

...

> +static int
> +mlx5_args_check(const char *key, const char *val, void *opaque)
> +{
> +	struct priv *priv =3D opaque;
> +
> +	/* No parameters are expected at the moment. */
> +	(void)priv;
> +	(void)val;
> +	WARN("%s: unknown parameter", key);
> +	return EINVAL;
Returning positive value here will prevent rte_kvargs_process() to fail,
I guess that is the intention but returning EINVAL is misleading.

Also generating the checkpatch warning:
WARNING:USE_NEGATIVE_ERRNO: return of an errno should typically be
negative (ie: return -EINVAL)
#71: FILE: drivers/net/mlx5/mlx5.c:264:
+       return EINVAL;