Re: [dpdk-dev] [PATCH v2] net/iavf: fix PF returning error

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Xing, Beilei
> Sent: Monday, April 26, 2021 9:34 AM
> To: Zhang, AlvinX <alvinx.zhang@intel.com>; Wu, Jingjing
> <jingjing.wu@intel.com>
> Cc: dev@dpdk.org; stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v2] net/iavf: fix PF returning error
> 
> 
> 
> > -----Original Message-----
> > From: Zhang, AlvinX <alvinx.zhang@intel.com>
> > Sent: Sunday, April 25, 2021 3:40 PM
> > To: Wu, Jingjing <jingjing.wu@intel.com>; Xing, Beilei
> > <beilei.xing@intel.com>
> > Cc: dev@dpdk.org; Zhang, AlvinX <alvinx.zhang@intel.com>;
> > stable@dpdk.org
> > Subject: [PATCH v2] net/iavf: fix PF returning error
> >
> > When the command sent by VF to PF fails, iavf may need to run
> > different code paths according to the specific reason of the failure
> > (not supported or other reasons).
> >
> > This patch adds support of identifying PF return error type.
> >
> > Fixes: 22b123a36d07 ("net/avf: initialize PMD")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
> > ---
> >
> > v2: Refine codes according to comments.
> > ---
> >  drivers/net/iavf/iavf.h       |  4 ++--
> >  drivers/net/iavf/iavf_vchnl.c | 18 ++++++++++++------
> >  2 files changed, 14 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h index
> > d1ae5a3..4a2e203 100644
> > --- a/drivers/net/iavf/iavf.h
> > +++ b/drivers/net/iavf/iavf.h
> > @@ -144,7 +144,7 @@ struct iavf_info {
> >  	uint64_t supported_rxdid;
> >  	uint8_t *proto_xtr; /* proto xtr type for all queues */
> >  	volatile enum virtchnl_ops pend_cmd; /* pending command not finished
> > */
> > -	uint32_t cmd_retval; /* return value of the cmd response from PF */
> > +	int cmd_retval; /* return value of the cmd response from PF */
> >  	uint8_t *aq_resp; /* buffer to store the adminq response from PF */
> >
> >  	/* Event from pf */
> > @@ -264,7 +264,7 @@ struct iavf_cmd_info {
> >   * _atomic_set_cmd successfully.
> >   */
> >  static inline void
> > -_notify_cmd(struct iavf_info *vf, uint32_t msg_ret)
> > +_notify_cmd(struct iavf_info *vf, int msg_ret)
> >  {
> >  	vf->cmd_retval = msg_ret;
> >  	rte_wmb();
> > diff --git a/drivers/net/iavf/iavf_vchnl.c
> > b/drivers/net/iavf/iavf_vchnl.c index
> > 45096cb..f2b46f1 100644
> > --- a/drivers/net/iavf/iavf_vchnl.c
> > +++ b/drivers/net/iavf/iavf_vchnl.c
> > @@ -228,13 +228,19 @@
> >  			rte_delay_ms(ASQ_DELAY_MS);
> >  			/* If don't read msg or read sys event, continue */
> >  		} while (i++ < MAX_TRY_TIMES);
> > -		/* If there's no response is received, clear command */
> > -		if (i >= MAX_TRY_TIMES  ||
> > -		    vf->cmd_retval != VIRTCHNL_STATUS_SUCCESS) {
> > -			err = -1;
> > -			PMD_DRV_LOG(ERR, "No response or return failure
> > (%d)"
> > -				    " for cmd %d", vf->cmd_retval, args->ops);
> > +
> > +		if (i >= MAX_TRY_TIMES) {
> > +			PMD_DRV_LOG(ERR, "No response for cmd %d", args-
> > >ops);
> >  			_clear_cmd(vf);
> > +			err = -EIO;
> > +		} else if (vf->cmd_retval ==
> > +			   VIRTCHNL_STATUS_ERR_NOT_SUPPORTED) {
> > +			PMD_DRV_LOG(ERR, "Cmd %d not supported", args-
> > >ops);
> > +			err = -ENOTSUP;
> > +		} else if (vf->cmd_retval != VIRTCHNL_STATUS_SUCCESS) {
> > +			PMD_DRV_LOG(ERR, "Return failure %d for cmd %d",
> > +				    vf->cmd_retval, args->ops);
> > +			err = -EINVAL;
> >  		}
> >  		break;
> >  	}
> > --
> > 1.8.3.1
> 
> Acked-by: Beilei Xing <beilei.xing@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi