Re: [dpdk-dev] [PATCH] net/ixgbe: fix dcb configuration issue

["Yang, Qiming" <qiming.yang@intel.com>]

I'll send v2 later.

> -----Original Message-----
> From: Zhang, Qi Z
> Sent: Thursday, May 17, 2018 9:19 PM
> To: dev@dpdk.org
> Cc: Wu, Jingjing <jingjing.wu@intel.com>; Lu, Wenzhuo
> <wenzhuo.lu@intel.com>; Yang, Qiming <qiming.yang@intel.com>;
> stable@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbe: fix dcb configuration issue
> 
> Hi Qiming
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org]
> > Sent: Thursday, May 17, 2018 9:23 PM
> > To: dev@dpdk.org
> > Cc: Wu, Jingjing <jingjing.wu@intel.com>; Lu, Wenzhuo
> > <wenzhuo.lu@intel.com>; Yang, Qiming <qiming.yang@intel.com>;
> > stable@dpdk.org
> > Subject: [dpdk-dev] [PATCH] net/ixgbe: fix dcb configuration issue
> >
> > This patch removed unnecessary check in ixgbe_check_mq_mode, fixed
> > historical issue.
> >
> > Fixes: 27b609cbd1c6 ("ethdev: move the multi-queue mode check to
> > specific
> > drivers")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Qiming Yang <qiming.yang@intel.com>
> > ---
> >  drivers/net/ixgbe/ixgbe_ethdev.c | 37
> > -------------------------------------
> >  1 file changed, 37 deletions(-)
> >
> > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > index f5006bc..9e3ae95 100644
> > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > @@ -2300,43 +2300,6 @@ ixgbe_check_mq_mode(struct rte_eth_dev *dev)
> >  			}
> >  		}
> >
> > -		/* For DCB mode check our configuration before we go further
> */
> > -		if (dev_conf->rxmode.mq_mode == ETH_MQ_RX_DCB) {
> > -			const struct rte_eth_dcb_rx_conf *conf;
> > -
> > -			if (nb_rx_q != IXGBE_DCB_NB_QUEUES) {
> > -				PMD_INIT_LOG(ERR, "DCB selected,
> nb_rx_q != %d.",
> > -						 IXGBE_DCB_NB_QUEUES);
> > -				return -EINVAL;
> > -			}
> > -			conf = &dev_conf->rx_adv_conf.dcb_rx_conf;
> > -			if (!(conf->nb_tcs == ETH_4_TCS ||
> > -			       conf->nb_tcs == ETH_8_TCS)) {
> 
> I guess, we should not remove all check, for nb_tcs, it still valid, right?
> 
> > -				PMD_INIT_LOG(ERR, "DCB selected,
> nb_tcs != %d"
> > -						" and nb_tcs != %d.",
> > -						ETH_4_TCS, ETH_8_TCS);
> > -				return -EINVAL;
> > -			}
> > -		}
> > -
> > -		if (dev_conf->txmode.mq_mode == ETH_MQ_TX_DCB) {
> > -			const struct rte_eth_dcb_tx_conf *conf;
> > -
> > -			if (nb_tx_q != IXGBE_DCB_NB_QUEUES) {
> > -				PMD_INIT_LOG(ERR, "DCB, nb_tx_q != %d.",
> > -						 IXGBE_DCB_NB_QUEUES);
> > -				return -EINVAL;
> > -			}
> > -			conf = &dev_conf->tx_adv_conf.dcb_tx_conf;
> > -			if (!(conf->nb_tcs == ETH_4_TCS ||
> > -			       conf->nb_tcs == ETH_8_TCS)) {
> Same to rx.
> > -				PMD_INIT_LOG(ERR, "DCB selected,
> nb_tcs != %d"
> > -						" and nb_tcs != %d.",
> > -						ETH_4_TCS, ETH_8_TCS);
> > -				return -EINVAL;
> > -			}
> > -		}
> > -
> >  		/*
> >  		 * When DCB/VT is off, maximum number of queues changes,
> >  		 * except for 82598EB, which remains constant.
> > --
> > 2.9.5