hw/intc/loongson_ipi: Fix resource leak

Once initialised, QOM objects can be realized and
unrealized multiple times before being finalized.
Resources allocated in REALIZE must be deallocated
in an equivalent UNREALIZE handler.

Free the CPU array in loongson_ipi_unrealize()
instead of loongson_ipi_finalize().

Cc: qemu-stable@nongnu.org
Fixes: 5e90b8db382 ("hw/loongarch: Set iocsr address space per-board rather than percpu")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20240723111405.14208-3-philmd@linaro.org>
(cherry picked from commit 0c2086bc7360565dfb9933181dafaefe2c94cddf)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(Mjt: rename loongson back to longarch for 9.0 due to lack of
 v9.0.0-582-gb4a12dfc2132 "hw/intc/loongarch_ipi: Rename as loongson_ipi")

diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
index 521731342cdff144155c2b7a6e8fbb4b3a8a315c..c210b51811c8b891e7ed53d1316a5e0cb93dc81e 100644 (file)
--- a/hw/intc/loongarch_ipi.c
+++ b/hw/intc/loongarch_ipi.c
@@ -301,6 +301,13 @@ static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
     }
 }
 
+static void loongarch_ipi_unrealize(DeviceState *dev)
+{
+    LoongArchIPI *s = LOONGARCH_IPI(dev);
+
+    g_free(s->cpu);
+}
+
 static const VMStateDescription vmstate_ipi_core = {
     .name = "ipi-single",
     .version_id = 2,
@@ -336,23 +343,16 @@ static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = loongarch_ipi_realize;
+    dc->unrealize = loongarch_ipi_unrealize;
     device_class_set_props(dc, ipi_properties);
     dc->vmsd = &vmstate_loongarch_ipi;
 }
 
-static void loongarch_ipi_finalize(Object *obj)
-{
-    LoongArchIPI *s = LOONGARCH_IPI(obj);
-
-    g_free(s->cpu);
-}
-
 static const TypeInfo loongarch_ipi_info = {
     .name          = TYPE_LOONGARCH_IPI,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(LoongArchIPI),
     .class_init    = loongarch_ipi_class_init,
-    .instance_finalize = loongarch_ipi_finalize,
 };
 
 static void loongarch_ipi_register_types(void)