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From: "Zhao1, Wei" <wei.zhao1@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
CC: "dev@dpdk.org" <dev@dpdk.org>, "stable@dpdk.org" <stable@dpdk.org>,
 "Zhang, Qi Z" <qi.z.zhang@intel.com>
Thread-Topic: [dpdk-dev] [PATCH] net/ixgbe: check jumbo frame enable parameter
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Date: Mon, 5 Nov 2018 09:13:28 +0000
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Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] net/ixgbe: check jumbo frame
	enable parameter
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> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Friday, November 2, 2018 1:46 AM
> To: Zhao1, Wei <wei.zhao1@intel.com>
> Cc: dev@dpdk.org; stable@dpdk.org; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: Re: [dpdk-dev] [PATCH] net/ixgbe: check jumbo frame enable
> parameter
>=20
> On Thu,  1 Nov 2018 15:55:26 +0800
> wei zhao <wei.zhao1@intel.com> wrote:
>=20
> > +	/* check that max packet size is within the allowed range */
> > +	if (max_rx_pkt_len < ETHER_MIN_MTU) {
> > +		PMD_INIT_LOG(ERR, "max packet size is too small.");
> > +		return -EINVAL;
> > +	}
> > +
> > +	if (max_rx_pkt_len > dev_info.max_rx_pktlen) {
> > +		PMD_INIT_LOG(ERR, "max packet size is too big.");
> > +		return -EINVAL;
> > +	}
> > +
> > +	/* check jumbo mode if needed */
> > +	if (max_rx_pkt_len < ETHER_MAX_LEN) {
> > +		PMD_INIT_LOG(ERR, "No need to enable jumbo.");
> > +		return -EINVAL;
> > +	}
> > +
>=20
> Yes, these checks are needed and for other devices as well.
> Why not add them into rte_ethdev instead?

I am not familiar with NIC except ixgbe and i40e, I am not sure property of=
 other NIC and rationality of these check....