Re: [PATCH rdma-next v6] RDMA: Change capability fields in ib_device_attr from int to u32

On Tue, Jun 02, 2026 at 12:33:27PM +0100, David Laight wrote:
 > diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
> > index 6482ad859bd1..852213365ecd 100644
> > --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
> > +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
> > @@ -1731,7 +1731,7 @@ static int create_con(struct rtrs_srv_path *srv_path,
> >  		 * All receive and all send (each requiring invalidate)
> >  		 * + 2 for drain and heartbeat
> >  		 */
> > -		max_send_wr = min_t(int, wr_limit,
> > +		max_send_wr = min_t(u32, wr_limit,
> >  				    SERVICE_CON_QUEUE_DEPTH * 2 + 2);
> 
> That should compile as min().
> (The constant is known to be non-negative.)

Okay, I'll update this in the next version.
> 
> ...
> > diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
> > index e6e2c3f9afdf..fd6923198ec1 100644
> > --- a/drivers/nvme/target/rdma.c
> > +++ b/drivers/nvme/target/rdma.c
> ...
> > @@ -1553,8 +1554,8 @@ static int nvmet_rdma_cm_accept(struct rdma_cm_id *cm_id,
> >  
> >  	param.rnr_retry_count = 7;
> >  	param.flow_control = 1;
> > -	param.initiator_depth = min_t(u8, p->initiator_depth,
> > -		queue->dev->device->attrs.max_qp_init_rd_atom);
> > +	param.initiator_depth = (u8)min_t(u32, p->initiator_depth,
> > +		min_t(u32, U8_MAX, queue->dev->device->attrs.max_qp_init_rd_atom));
> 
> I think you've change one of those to min_3().
> Nesting min() is a good way to bloat the pre-processor output.
> You don't need any of the casts.
> 	
> 	param.initiator_depth = min_3(p->initiator_depth,
> 		queue->dev->device->attrs.max_qp_init_rd_atom, U8_MAX);
> should be fine - if a bit long.
> 
> There are also (u32)U8_MAX casts lurking - pointless.
> 
Okay. I'll use min3 as suggested in the next version and remove
unneccesary casts.

Thanks,
Vennela
> -- David