Re: [PATCH v2 5/6] macio: don't reference serial_hd() directly within the device

[Thomas Huth]

On 26/09/2020 16.02, Mark Cave-Ayland wrote:
> Instead use qdev_prop_set_chr() to configure the ESCC serial chardevs at the
> Mac Old World and New World machine level.
> 
> Also remove the now obsolete comment referring to the use of serial_hd() and
> the setting of user_creatable to false accordingly.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> ---
>  hw/misc/macio/macio.c | 4 ----
>  hw/ppc/mac_newworld.c | 6 ++++++
>  hw/ppc/mac_oldworld.c | 6 ++++++
>  3 files changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/misc/macio/macio.c b/hw/misc/macio/macio.c
> index 679722628e..51368884d0 100644
> --- a/hw/misc/macio/macio.c
> +++ b/hw/misc/macio/macio.c
> @@ -109,8 +109,6 @@ static void macio_common_realize(PCIDevice *d, Error 
> **errp)
>      qdev_prop_set_uint32(DEVICE(&s->escc), "disabled", 0);
>      qdev_prop_set_uint32(DEVICE(&s->escc), "frequency", ESCC_CLOCK);
>      qdev_prop_set_uint32(DEVICE(&s->escc), "it_shift", 4);
> -    qdev_prop_set_chr(DEVICE(&s->escc), "chrA", serial_hd(0));
> -    qdev_prop_set_chr(DEVICE(&s->escc), "chrB", serial_hd(1));
>      qdev_prop_set_uint32(DEVICE(&s->escc), "chnBtype", escc_serial);
>      qdev_prop_set_uint32(DEVICE(&s->escc), "chnAtype", escc_serial);
>      if (!qdev_realize(DEVICE(&s->escc), BUS(&s->macio_bus), errp)) {
> @@ -458,8 +456,6 @@ static void macio_class_init(ObjectClass *klass, void 
> *data)
>      k->class_id = PCI_CLASS_OTHERS << 8;
>      device_class_set_props(dc, macio_properties);
>      set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
> -    /* Reason: Uses serial_hds in macio_instance_init */
> -    dc->user_creatable = false;
>  }

 Hi Mark,

the macio device can now be used to crash QEMU:

 $ ./qemu-system-ppc -M sam460ex -device macio-newworld
 Segmentation fault (core dumped)

I guess we should either restore the user_creatable flag or add some sanity
checks elsewhere?

 Thomas