Re: [PATCH] hw/display/xlnx_dp: Free FIFOs adding xlnx_dp_finalize()

[Alistair Francis <alistair23@gmail.com>]

On Tue, Mar 23, 2021 at 3:15 PM Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>
> When building with --enable-sanitizers we get:
>
>   Direct leak of 16 byte(s) in 1 object(s) allocated from:
>       #0 0x5618479ec7cf in malloc (qemu-system-aarch64+0x233b7cf)
>       #1 0x7f675745f958 in g_malloc (/lib64/libglib-2.0.so.0+0x58958)
>       #2 0x561847c2dcc9 in xlnx_dp_init hw/display/xlnx_dp.c:1259:5
>       #3 0x56184a5bdab8 in object_init_with_type qom/object.c:375:9
>       #4 0x56184a5a2bda in object_initialize_with_type qom/object.c:517:5
>       #5 0x56184a5a24d5 in object_initialize qom/object.c:536:5
>       #6 0x56184a5a2f6c in object_initialize_child_with_propsv qom/object.c:566:5
>       #7 0x56184a5a2e60 in object_initialize_child_with_props qom/object.c:549:10
>       #8 0x56184a5a3a1e in object_initialize_child_internal qom/object.c:603:5
>       #9 0x5618495aa431 in xlnx_zynqmp_init hw/arm/xlnx-zynqmp.c:273:5
>
> The RX/TX FIFOs are created in xlnx_dp_init(), add xlnx_dp_finalize()
> to destroy them.
>
> Fixes: 58ac482a66d ("introduce xlnx-dp")
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  hw/display/xlnx_dp.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/hw/display/xlnx_dp.c b/hw/display/xlnx_dp.c
> index c56e6ec5936..4fd6aeb18b5 100644
> --- a/hw/display/xlnx_dp.c
> +++ b/hw/display/xlnx_dp.c
> @@ -1260,6 +1260,14 @@ static void xlnx_dp_init(Object *obj)
>      fifo8_create(&s->tx_fifo, 16);
>  }
>
> +static void xlnx_dp_finalize(Object *obj)
> +{
> +    XlnxDPState *s = XLNX_DP(obj);
> +
> +    fifo8_destroy(&s->tx_fifo);
> +    fifo8_destroy(&s->rx_fifo);
> +}
> +
>  static void xlnx_dp_realize(DeviceState *dev, Error **errp)
>  {
>      XlnxDPState *s = XLNX_DP(dev);
> @@ -1359,6 +1367,7 @@ static const TypeInfo xlnx_dp_info = {
>      .parent        = TYPE_SYS_BUS_DEVICE,
>      .instance_size = sizeof(XlnxDPState),
>      .instance_init = xlnx_dp_init,
> +    .instance_finalize = xlnx_dp_finalize,
>      .class_init    = xlnx_dp_class_init,
>  };
>
> --
> 2.26.2
>
>