Re: [PATCH v2 3/4] hw/cxl/mbox: replace sanitize_running() with cxl_dev_media_disabled()

[Jonathan Cameron <Jonathan.Cameron@Huawei.com>]

On Sun, 21 Jan 2024 21:50:00 -0500
Hyeonggon Yoo <42.hyeyoo@gmail.com> wrote:

> On Tue, Jan 9, 2024 at 12:54 PM Jonathan Cameron
> <Jonathan.Cameron@huawei.com> wrote:
> >
> > On Fri, 22 Dec 2023 18:00:50 +0900
> > Hyeonggon Yoo <42.hyeyoo@gmail.com> wrote:
> >  
> > > The spec states that reads/writes should have no effect and a part of
> > > commands should be ignored when the media is disabled, not when the
> > > sanitize command is running.qq
> > >
> > > Introduce cxl_dev_media_disabled() to check if the media is disabled and
> > > replace sanitize_running() with it.
> > >
> > > Make sure that the media has been correctly disabled during sanitation
> > > by adding an assert to __toggle_media(). Now, enabling when already
> > > enabled or vice versa results in an assert() failure.
> > >
> > > Suggested-by: Davidlohr Bueso <dave@stgolabs.net>
> > > Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>  
> >
> > This applies to
> >
> > hw/cxl: Add get scan media capabilities cmd support.
> >
> > Should I just squash it with that patch in my tree?
> > For now I'm holding it immediately on top of that, but I'm not keen to
> > send messy code upstream unless there is a good reason to retain the
> > history.  
> 
> Oh, while the diff looks like the patch touches scan_media_running(), it's not.
> 
> The proper Fixes: tag will be:
> Fixes: d77176724422 ("hw/cxl: Add support for device sanitation")
> 
> > If you are doing this sort of fix series in future, please call out
> > what they fix explicitly.  Can't use fixes tags as the commit ids
> > are unstable, but can mention the patch to make my life easier!  
> 
> Okay, next time I will either add the Fixes tag or add a comment on
> what it fixes.
> 
> By the way I guess your latest, public branch is still cxl-2023-11-02, right?
> https://gitlab.com/jic23/qemu/-/tree/cxl-2023-11-02
> 
> I assume you adjusted my v2 series, but please let me know if you prefer
> sending v3 against your latest tree.
> 
> Thanks,
> Hyeonggon

Side note, in it's current form this breaks the switch-cci support in upstream
QEMU.  I've finally gotten back to getting ready to look at MMPT support and
ran into a crash as a result.  Needs protection with checked object_dynamic_cast()
to make sure we have a type3 device.  I'll update the patch in my tree.

Thanks,

Jonathan

>