[PATCH] examples/vhost: fix floating point exception when there is no VMDQ

[Wang, YuanX]

Hi Chenbo,

> -----Original Message-----
> From: Xia, Chenbo <chenbo.xia at intel.com>
> Sent: Monday, May 16, 2022 8:57 PM
> To: Wang, YuanX <yuanx.wang at intel.com>; maxime.coquelin at redhat.com
> Cc: dev at dpdk.org; Hu, Jiayu <jiayu.hu at intel.com>; He, Xingguang
> <xingguang.he at intel.com>
> Subject: RE: [PATCH] examples/vhost: fix floating point exception when
> there is no VMDQ
> 
> Hi Yuan,
> 
> > -----Original Message-----
> > From: Wang, YuanX <yuanx.wang at intel.com>
> > Sent: Tuesday, April 12, 2022 12:35 AM
> > To: maxime.coquelin at redhat.com; Xia, Chenbo <chenbo.xia at intel.com>
> > Cc: dev at dpdk.org; Hu, Jiayu <jiayu.hu at intel.com>; He, Xingguang
> > <xingguang.he at intel.com>; Wang, YuanX <yuanx.wang at intel.com>
> > Subject: [PATCH] examples/vhost: fix floating point exception when
> > there is no VMDQ
> 
> Based on the error reported by devtools/check-git-log.sh
> 
> Title better be: examples/vhost: fix floating point exception when no VMDq
> 
> >
> > If the VMDQ limits is 0, a divide-by-zero error occurs.
> > This patch replaces throwing a floating point exception with a normal
> > error message.
> 
> Pls add fix and cc-stable tag.

Thanks for the comments, will fix it in next version.

Regards,
Yuan

> 
> Thanks,
> Chenbo
> 
> >
> > Signed-off-by: Yuan Wang <yuanx.wang at intel.com>
> > ---
> >  examples/vhost/main.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/examples/vhost/main.c b/examples/vhost/main.c index
> > d94fabb060..815ac1cd57 100644
> > --- a/examples/vhost/main.c
> > +++ b/examples/vhost/main.c
> > @@ -400,6 +400,10 @@ port_init(uint16_t port)
> >
> >  		return retval;
> >  	}
> > +	if (dev_info.max_vmdq_pools == 0) {
> > +		RTE_LOG(ERR, VHOST_PORT, "Failed to get VMDQ info.\n");
> > +		return -1;
> > +	}
> >
> >  	rxconf = &dev_info.default_rxconf;
> >  	txconf = &dev_info.default_txconf;
> > --
> > 2.25.1