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Re: [PATCH v4 3/3] hw/misc/mos6522: move timer_new from init() into real


From: David Gibson
Subject: Re: [PATCH v4 3/3] hw/misc/mos6522: move timer_new from init() into realize() to avoid memleaks
Date: Fri, 6 Mar 2020 09:56:52 +1100

On Thu, Mar 05, 2020 at 02:54:22PM +0800, Pan Nengyuan wrote:
> There are some memleaks when we call 'device_list_properties'. This patch 
> move timer_new from init into realize to fix it.
> 
> Reported-by: Euler Robot <address@hidden>
> Signed-off-by: Pan Nengyuan <address@hidden>

Applied to ppc-for-5.0.

Probably the memory region stuff should be in realize() rather than
init() as well, but that can be fixed later.

> ---
> Cc: Laurent Vivier <address@hidden>
> Cc: Mark Cave-Ayland <address@hidden>
> Cc: David Gibson <address@hidden>
> Cc: address@hidden
> ---
> v2->v1:
> - no changes in this patch.
> v3->v2:
> - remove null check in reset, and add calls to mos6522_realize() in 
> mac_via_realize to make this move to be valid.
> v4->v3:
> - split patch into two, this patch fix the memleaks.
> ---
>  hw/misc/mos6522.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
> index 19e154b870..c1cd154a84 100644
> --- a/hw/misc/mos6522.c
> +++ b/hw/misc/mos6522.c
> @@ -485,6 +485,11 @@ static void mos6522_init(Object *obj)
>      for (i = 0; i < ARRAY_SIZE(s->timers); i++) {
>          s->timers[i].index = i;
>      }
> +}
> +
> +static void mos6522_realize(DeviceState *dev, Error **errp)
> +{
> +    MOS6522State *s = MOS6522(dev);
>  
>      s->timers[0].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer1, s);
>      s->timers[1].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer2, s);
> @@ -502,6 +507,7 @@ static void mos6522_class_init(ObjectClass *oc, void 
> *data)
>  
>      dc->reset = mos6522_reset;
>      dc->vmsd = &vmstate_mos6522;
> +    dc->realize = mos6522_realize;
>      device_class_set_props(dc, mos6522_properties);
>      mdc->parent_reset = dc->reset;
>      mdc->set_sr_int = mos6522_set_sr_int;

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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