Re: [PATCH 06/26] cxl/port: Add Dynamic Capacity mode support to endpoint decoders

Ira Weiny
2024-05-10T05:31:53Z

Dan Williams wrote:
> Ira Weiny wrote:
> [..]
> > > > + case CXL_DECODER_DC0 ... CXL_DECODER_DC7:
> > > > + rc = dc_mode_to_region_index(mode);
> > > > + if (rc < 0)
> > > > + return rc;
> > >
> > > Can't fail, so you could not bother checking.. Seems very unlikely
> > > that function will gain other error cases in the future.
> >
> > Sure, done.
>
> Can dc_mode_to_region_index() be dropped altogether? Is there any
> scenario where dc_mode_to_region_index() is really handling an anonymous
> @mode argument? I.e. just replace all dc_mode_to_region_index() with
> "mode - CXL_DECODER_DC0"?

Once we open up DC partitions to support multiple regions, no.

How about we remove the check in dc_mode_to_region_index() but keep the
function? That makes it clear that we are converting from an enum to int
index?

Ira