Re: [PATCH rdma-next] RDMA/mana_ib: Use ib_get_eth_speed for reporting port speed

[Leon Romanovsky <leon@kernel.org>]

On Wed, May 13, 2026 at 10:15:01PM +0000, Long Li wrote:
> > From: Shiraz Saleem <shirazsaleem@microsoft.com>
> > 
> > Replace hardcoded IB_WIDTH_4X/IB_SPEED_EDR with ib_get_eth_speed() to
> > report the actual link speed in mana_ib_query_port().
> > 
> > Fixes: 4bda1d5332ec ("RDMA/mana_ib: Implement port parameters")
> > Signed-off-by: Shiraz Saleem <shirazsaleem@microsoft.com>
> > Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
> > ---
> >  drivers/infiniband/hw/mana/main.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/drivers/infiniband/hw/mana/main.c
> > b/drivers/infiniband/hw/mana/main.c
> > index d4dfbec..9af92a4 100644
> > --- a/drivers/infiniband/hw/mana/main.c
> > +++ b/drivers/infiniband/hw/mana/main.c
> > @@ -633,8 +633,7 @@ int mana_ib_query_port(struct ib_device *ibdev, u32
> > port,
> >  		props->phys_state = IB_PORT_PHYS_STATE_DISABLED;
> >  	}
> > 
> > -	props->active_width = IB_WIDTH_4X;
> > -	props->active_speed = IB_SPEED_EDR;
> > +	ib_get_eth_speed(ibdev, port, &props->active_speed,
> > +&props->active_width);
> 
> Should it check the return value, use default values as fallback?

Should it perform the check? Maybe.

Should it fall back to default values? No. A failure at this
stage indicates that the driver is fundamentally broken. This is
why many drivers do not bother checking the return value here.

Thanks

> 
> Something like:
> 
>    ret = ib_get_eth_speed(ibdev, port, &props->active_speed, &props->active_width);
>    if (ret) {
>         props->active_width = IB_WIDTH_4X;
>         props->active_speed = IB_SPEED_EDR;
>    }
>