Re: [PATCH 08/14] IB/core: Add rdma_max_mad_size helper

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On Wed, May 20, 2015 at 02:02:27PM -0400, ira.weiny wrote:
> On Wed, May 20, 2015 at 11:37:47AM -0600, Hefty, Sean wrote:
> > > +/**
> > > + * rdma_max_mad_size - Return the max MAD size required by this RDMA
> > > Port.
> > > + *
> > > + * @device: Device
> > > + * @port_num: Port number
> > > + *
> > > + * Return the max MAD size required by the Port.  Should return 0 if the
> > > port
> > > + * does not support MADs
> > > + */
> > > +static inline size_t rdma_max_mad_size(struct ib_device *device, u8
> > > port_num)
> > > +{
> > > +	return device->port_immutable[port_num].max_mad_size;
> > > +}
> > 
> > Should this function check the mad_cap bit and return 0 if not set?  If not,
> > I would remove the 'should return 0...' statement from the comment above and
> > state that the caller should check the mad_cap bit first.
> 
> I'll change the comment.

If there is no mad support the port_immutable.max_mad_size should be
0, force it during registration, then the comment is right.

Force to 0 is better than 'some random value'

Jason
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