Re: [Qemu-devel] [PATCH v1] vl: Fix possible freed memory accessing

[Peter Maydell]

On 18 September 2014 23:54, Markus Armbruster <address@hidden> wrote:
> I think we should remove the whole thing: pcmcia_sockets,
> pcmcia_socket_register(), pcmcia_socket_unregister, pcmcia_info().
> Here's why.
>
> It serves just one purpose: "info pcmcia".  HMP-only, therefore not a
> stable interface.  But is it a useful one?
>
> The only caller of pcmcia_socket_register() is pxa2xx_pcmcia_realize(),
> of device model "pxa2xx-pcmcia".  As far as I can tell, used only by a
> couple of ARM boards: "verdex", "mainstone", "akita", "spitz", "borzoi",
> "terrier", "z2", "connex", "tosa".
>
> Of these, only "akita", "spitz", "borzoi", "terrier" and "tosa" insert a
> card into the slot, and they do so right on board initialization.
> Nothing ever ejects a card from a slot.  Therefore, "info pcmcia"
> effectively prints a fixed, machine-specific string so far.  Doesn't
> sound useful to me.
>
> If we acquire PCMCIA devices where querying status is interesting, we'll
> want a QMP command, so this code will be pretty much useless.

I wouldn't particularly object to the info code disappearing. pxa2xx
is pretty old and crufty code at this point and I don't suppose
the pcmcia code has been modernised very much.

(Couldn't you implement a hypothetical pcmcia HMP/QMP command by
scanning the QOM tree for pcmcia device objects now anyway?)

-- PMM