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Re: [Qemu-devel] [PATCH] secondary-vga: unregister vram on unplug.

From: Dr. David Alan Gilbert
Subject: Re: [Qemu-devel] [PATCH] secondary-vga: unregister vram on unplug.
Date: Tue, 7 Aug 2018 15:57:01 +0100
User-agent: Mutt/1.10.1 (2018-07-13)

* Gerd Hoffmann (address@hidden) wrote:
> On Fri, Jul 20, 2018 at 10:19:48AM +0200, address@hidden wrote:
> > From: "Remy Noel" <address@hidden>
> > 
> > When removing a secondary-vga device and then adding it back (or adding
> > an other one), qemu aborts with:
> >     "RAMBlock "0000:00:02.0/vga.vram" already registered, abort!".
> > 
> > It is caused by the vram staying registered, preventing vga replugging.
> David?  Does that look ok?
> This balances the
>      vmstate_register_ram(&s->vram, s->global_vmstate ?  NULL : DEVICE(obj));
> call in vga_common_init().  I'm wondering whenever the manual cleanup is
> actually needed in case owner is not NULL?

I can't see anyone who is calling unregister_ram or the functions it
calls as part of generic device cleanup, so I think it IS needed
to manually do it.

Which is a bit worrying since we have vastly more register's than


> thanks,
>   Gerd
Dr. David Alan Gilbert / address@hidden / Manchester, UK

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