RE: [PATCH for-next v2 15/16] IB/core: Map iWarp AH type to undefined in rdma_ah_find_type

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> -----Original Message-----
> From: linux-rdma-owner@xxxxxxxxxxxxxxx [mailto:linux-rdma-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Parav Pandit
> Sent: Friday, January 26, 2018 3:40 PM
> To: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>; jgg@xxxxxxxx;
> dledford@xxxxxxxxxx
> Cc: linux-rdma@xxxxxxxxxxxxxxx; Shiraz Saleem <shiraz.saleem@xxxxxxxxx>; Don
> Hiatt <don.hiatt@xxxxxxxxx>; Sean Hefty <sean.hefty@xxxxxxxxx>; Ira Weiny
> <ira.weiny@xxxxxxxxx>
> Subject: RE: [PATCH for-next v2 15/16] IB/core: Map iWarp AH type to
> undefined in rdma_ah_find_type
> 
> 
> 
> > -----Original Message-----
> > From: Dennis Dalessandro [mailto:dennis.dalessandro@xxxxxxxxx]
> > Sent: Friday, January 26, 2018 3:31 PM
> > To: jgg@xxxxxxxx; dledford@xxxxxxxxxx
> > Cc: Parav Pandit <parav@xxxxxxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx;
> > Shiraz Saleem <shiraz.saleem@xxxxxxxxx>; Don Hiatt
> > <don.hiatt@xxxxxxxxx>; Sean Hefty <sean.hefty@xxxxxxxxx>; Ira Weiny
> > <ira.weiny@xxxxxxxxx>
> > Subject: [PATCH for-next v2 15/16] IB/core: Map iWarp AH type to
> > undefined in rdma_ah_find_type
> >
> > From: Don Hiatt <don.hiatt@xxxxxxxxx>
> >
> > iWarp devices do not support the creation of address handles so return
> > AH_ATTR_TYPE_UNDEFINED for all iWarp devices.
> >
> > While we are here reduce the size of port_num to u8 and add a comment.
> >
> > Fixes: 44c58487d51a ("IB/core: Define 'ib' and 'roce' rdma_ah_attr
> > types")
> > Reported-by: Parav Pandit <parav@xxxxxxxxxxxx>
> > CC: Sean Hefty <sean.hefty@xxxxxxxxx>
> > Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
> > Reviewed-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
> > Signed-off-by: Don Hiatt <don.hiatt@xxxxxxxxx>
> > Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
> >
> > ---
> > Changes since v1: Add Shiraz RB tag, move undefined to be 0 not 3
> > ---
> >  include/rdma/ib_verbs.h |   12 ++++++++++--
> >  1 files changed, 10 insertions(+), 2 deletions(-)
> >
> > diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index
> > 5e32fe7..0eb3074 100644
> > --- a/include/rdma/ib_verbs.h
> > +++ b/include/rdma/ib_verbs.h
> > @@ -878,6 +878,7 @@ struct ib_mr_status {  __attribute_const__ enum
> > ib_rate mult_to_ib_rate(int mult);
> >
> >  enum rdma_ah_attr_type {
> > +	RDMA_AH_ATTR_TYPE_UNDEFINED,
> >  	RDMA_AH_ATTR_TYPE_IB,
> >  	RDMA_AH_ATTR_TYPE_ROCE,
> >  	RDMA_AH_ATTR_TYPE_OPA,
> > @@ -3789,12 +3790,19 @@ static inline void rdma_ah_set_grh(struct
> > rdma_ah_attr *attr,
> >  	grh->traffic_class = traffic_class;
> >  }
> >
> > -/*Get AH type */
> > +/**
> > + * rdma_ah_find_type - Return address handle type.
> > + *
> > + * @dev: Device to be checked
> > + * @port_num: Port number
> > + */
> >  static inline enum rdma_ah_attr_type rdma_ah_find_type(struct
> > ib_device *dev,
> > -						       u32 port_num)
> > +						       u8 port_num)
> >  {
> >  	if (rdma_protocol_roce(dev, port_num))
> >  		return RDMA_AH_ATTR_TYPE_ROCE;
> > +	else if (rdma_protocol_iwarp(dev, port_num))
> > +		return RDMA_AH_ATTR_TYPE_UNDEFINED;
> >  	else if ((rdma_protocol_ib(dev, port_num)) &&
> >  		 (rdma_cap_opa_ah(dev, port_num)))
> >  		return RDMA_AH_ATTR_TYPE_OPA;
> You need a case to return AH_TYPE_IB.
> 
I am sorry, didn't notice the else part that returns AH_TYPE_IB.

> 
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