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[Qemu-devel] [PATCH v2 06/16] hw/arm/bcm2835: Use object_initialize_chil
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH v2 06/16] hw/arm/bcm2835: Use object_initialize_child for correct ref. counting |
Date: |
Tue, 7 May 2019 18:34:06 +0200 |
As explained in commit aff39be0ed97:
Both functions, object_initialize() and object_property_add_child()
increase the reference counter of the new object, so one of the
references has to be dropped afterwards to get the reference
counting right. Otherwise the child object will not be properly
cleaned up when the parent gets destroyed.
Thus let's use now object_initialize_child() instead to get the
reference counting here right.
This patch was generated using the following Coccinelle script
(with a bit of manual fix-up for overly long lines):
@use_object_initialize_child@
expression parent_obj;
expression child_ptr;
expression child_name;
expression child_type;
expression child_size;
expression errp;
@@
(
- object_initialize(child_ptr, child_size, child_type);
+ object_initialize_child(parent_obj, child_name, child_ptr, child_size,
+ child_type, &error_abort, NULL);
... when != parent_obj
- object_property_add_child(parent_obj, child_name, OBJECT(child_ptr), NULL);
...
?- object_unref(OBJECT(child_ptr));
|
- object_initialize(child_ptr, child_size, child_type);
+ object_initialize_child(parent_obj, child_name, child_ptr, child_size,
+ child_type, errp, NULL);
... when != parent_obj
- object_property_add_child(parent_obj, child_name, OBJECT(child_ptr), errp);
...
?- object_unref(OBJECT(child_ptr));
)
@use_sysbus_init_child_obj@
expression parent_obj;
expression dev;
expression child_ptr;
expression child_name;
expression child_type;
expression child_size;
expression errp;
@@
(
- object_initialize_child(parent_obj, child_name, child_ptr, child_size,
- child_type, errp, NULL);
+ sysbus_init_child_obj(parent_obj, child_name, child_ptr, child_size,
+ child_type);
...
- qdev_set_parent_bus(DEVICE(child_ptr), sysbus_get_default());
|
- object_initialize_child(parent_obj, child_name, child_ptr, child_size,
- child_type, errp, NULL);
+ sysbus_init_child_obj(parent_obj, child_name, child_ptr, child_size,
+ child_type);
- dev = DEVICE(child_ptr);
- qdev_set_parent_bus(dev, sysbus_get_default());
)
While the object_initialize() function doesn't take an
'Error *errp' argument, the object_initialize_child() does.
Since this code is used when a machine is created (and is not
yet running), we deliberately choose to use the &error_abort
argument instead of ignoring errors if an object creation failed.
This choice also matches when using sysbus_init_child_obj(),
since its code is:
void sysbus_init_child_obj(Object *parent,
const char *childname, void *child,
size_t childsize, const char *childtype)
{
object_initialize_child(parent, childname, child, childsize,
childtype, &error_abort, NULL);
qdev_set_parent_bus(DEVICE(child), sysbus_get_default());
}
Suggested-by: Eduardo Habkost <address@hidden>
Inspired-by: Thomas Huth <address@hidden>
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
hw/arm/bcm2835_peripherals.c | 53 ++++++++++++++----------------------
1 file changed, 20 insertions(+), 33 deletions(-)
diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
index 2931a82a25a..0fb54c7964e 100644
--- a/hw/arm/bcm2835_peripherals.c
+++ b/hw/arm/bcm2835_peripherals.c
@@ -41,44 +41,36 @@ static void bcm2835_peripherals_init(Object *obj)
MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT);
/* Interrupt Controller */
- object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
- object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL);
- qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default());
+ sysbus_init_child_obj(obj, "ic", &s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
/* UART0 */
- object_initialize(&s->uart0, sizeof(s->uart0), TYPE_PL011);
- object_property_add_child(obj, "uart0", OBJECT(&s->uart0), NULL);
- qdev_set_parent_bus(DEVICE(&s->uart0), sysbus_get_default());
+ sysbus_init_child_obj(obj, "uart0", &s->uart0, sizeof(s->uart0),
+ TYPE_PL011);
/* AUX / UART1 */
- object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX);
- object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL);
- qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default());
+ sysbus_init_child_obj(obj, "aux", &s->aux, sizeof(s->aux),
+ TYPE_BCM2835_AUX);
/* Mailboxes */
- object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX);
- object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL);
- qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default());
+ sysbus_init_child_obj(obj, "mbox", &s->mboxes, sizeof(s->mboxes),
+ TYPE_BCM2835_MBOX);
object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
OBJECT(&s->mbox_mr), &error_abort);
/* Framebuffer */
- object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
- object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
+ sysbus_init_child_obj(obj, "fb", &s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
&error_abort);
- qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
OBJECT(&s->gpu_bus_mr), &error_abort);
/* Property channel */
- object_initialize(&s->property, sizeof(s->property),
TYPE_BCM2835_PROPERTY);
- object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
+ sysbus_init_child_obj(obj, "property", &s->property, sizeof(s->property),
+ TYPE_BCM2835_PROPERTY);
object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
"board-rev", &error_abort);
- qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default());
object_property_add_const_link(OBJECT(&s->property), "fb",
OBJECT(&s->fb), &error_abort);
@@ -86,32 +78,27 @@ static void bcm2835_peripherals_init(Object *obj)
OBJECT(&s->gpu_bus_mr), &error_abort);
/* Random Number Generator */
- object_initialize(&s->rng, sizeof(s->rng), TYPE_BCM2835_RNG);
- object_property_add_child(obj, "rng", OBJECT(&s->rng), NULL);
- qdev_set_parent_bus(DEVICE(&s->rng), sysbus_get_default());
+ sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng),
+ TYPE_BCM2835_RNG);
/* Extended Mass Media Controller */
- object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
- object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
- qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
+ sysbus_init_child_obj(obj, "sdhci", &s->sdhci, sizeof(s->sdhci),
+ TYPE_SYSBUS_SDHCI);
/* SDHOST */
- object_initialize(&s->sdhost, sizeof(s->sdhost), TYPE_BCM2835_SDHOST);
- object_property_add_child(obj, "sdhost", OBJECT(&s->sdhost), NULL);
- qdev_set_parent_bus(DEVICE(&s->sdhost), sysbus_get_default());
+ sysbus_init_child_obj(obj, "sdhost", &s->sdhost, sizeof(s->sdhost),
+ TYPE_BCM2835_SDHOST);
/* DMA Channels */
- object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
- object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
- qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
+ sysbus_init_child_obj(obj, "dma", &s->dma, sizeof(s->dma),
+ TYPE_BCM2835_DMA);
object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
OBJECT(&s->gpu_bus_mr), &error_abort);
/* GPIO */
- object_initialize(&s->gpio, sizeof(s->gpio), TYPE_BCM2835_GPIO);
- object_property_add_child(obj, "gpio", OBJECT(&s->gpio), NULL);
- qdev_set_parent_bus(DEVICE(&s->gpio), sysbus_get_default());
+ sysbus_init_child_obj(obj, "gpio", &s->gpio, sizeof(s->gpio),
+ TYPE_BCM2835_GPIO);
object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci",
OBJECT(&s->sdhci.sdbus), &error_abort);
--
2.20.1
- Re: [Qemu-devel] [PATCH v2 01/16] hw/ppc/pnv: Use object_initialize_child for correct reference counting, (continued)
- [Qemu-devel] [PATCH v2 02/16] hw/misc/macio: Use object_initialize_child for correct ref. counting, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 03/16] hw/virtio: Use object_initialize_child for correct reference counting, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 04/16] hw/arm/bcm2835: Use TYPE_PL011 instead of hardcoded string, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 05/16] hw/arm/bcm2835: Use object_initialize() on PL011State, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 06/16] hw/arm/bcm2835: Use object_initialize_child for correct ref. counting,
Philippe Mathieu-Daudé <=
- [Qemu-devel] [PATCH v2 07/16] hw/arm/aspeed: Use object_initialize_child for correct ref. counting, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 08/16] hw/arm: Use object_initialize_child for correct reference counting, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 09/16] hw/mips: Use object_initialize() on MIPSCPSState, Philippe Mathieu-Daudé, 2019/05/07
- [Qemu-devel] [PATCH v2 10/16] hw/mips: Use object_initialize_child for correct reference counting, Philippe Mathieu-Daudé, 2019/05/07