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SubjectRe: [PATCH 2/4] nvdimm: Add IOCTL pass thru
On Tue, Nov 10, 2015 at 01:05:20PM -0500, Jeff Moyer wrote:
> Jerry Hoemann <jerry.hoemann@hpe.com> writes:
>
> > Add internal data structure for ndctl_passthru call.
> >
> > Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
> > ---
> > include/linux/libnvdimm.h | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
> > index 3f021dc..01117e1 100644
> > --- a/include/linux/libnvdimm.h
> > +++ b/include/linux/libnvdimm.h
> > @@ -72,6 +72,7 @@ struct nvdimm_bus_descriptor {
> > unsigned long dsm_mask;
> > char *provider_name;
> > ndctl_fn ndctl;
> > + ndctl_fn ndctl_passthru;
>
> I don't think this is necessary. Vector off inside of __nd_ioctl. That
> especially makes sense if you do switch to passthrough as a command
> instead of a type, but it can work either way.
>

In an earlier version, I added a "type" argument to ndctl_fn and switched
internally based upon that. I just came to the conclusion that I'd rather
have two separate acpi_nfit_ctl functions than one trying to do both sets
of argument marshaling. This is quite different both internally and
to the caller.

So, I thought it would be less confusing to the next engineer, and that
this was a good logical separation point.


--

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Jerry Hoemann Software Engineer Hewlett-Packard Enterprise

3404 E Harmony Rd. MS 36 phone: (970) 898-1022
Ft. Collins, CO 80528 FAX: (970) 898-0707
email: jerry.hoemann@hpe.com
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