Re: [PATCH 2/5] hw/pcmcia/microdrive: Register machine reset handler

[Peter Maydell <peter.maydell@linaro.org>]

On Sat, 24 Apr 2021 at 17:22, Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>
> The abstract PCMCIA_CARD is a bus-less TYPE_DEVICE, so devices
> implementing it are not reset automatically.
> Register a reset handler so children get reset on machine reset.
>
> Note, the DSCM-1XXXX device (TYPE_DSCM1XXXX) which inherits
> TYPE_MICRODRIVE and PCMCIA_CARD reset itself when a disk is
> attached or detached, but was not resetting itself on machine
> reset.
>
> It doesn't seem to be an issue because it is that way since the
> device QDev'ifycation 8 years ago, in commit d1f2c96a81a
> ("pcmcia: QOM'ify PCMCIACardState and MicroDriveState").
> Still, correct to have a proper API usage.
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  hw/pcmcia/pcmcia.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/hw/pcmcia/pcmcia.c b/hw/pcmcia/pcmcia.c
> index 03d13e7d670..73656257227 100644
> --- a/hw/pcmcia/pcmcia.c
> +++ b/hw/pcmcia/pcmcia.c
> @@ -6,14 +6,39 @@
>
>  #include "qemu/osdep.h"
>  #include "qemu/module.h"
> +#include "sysemu/reset.h"
>  #include "hw/pcmcia.h"
>
> +static void pcmcia_card_reset_handler(void *dev)
> +{
> +    device_legacy_reset(DEVICE(dev));
> +}
> +
> +static void pcmcia_card_realize(DeviceState *dev, Error **errp)
> +{
> +    qemu_register_reset(pcmcia_card_reset_handler, dev);
> +}
> +
> +static void pcmcia_card_unrealize(DeviceState *dev)
> +{
> +    qemu_unregister_reset(pcmcia_card_reset_handler, dev);
> +}

Why isn't a pcmcia card something that plugs into a bus ?

-- PMM