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Re: [Qemu-devel] [PATCH] hw/ppc: Use object_initialize_child for correct
From: |
Thomas Huth |
Subject: |
Re: [Qemu-devel] [PATCH] hw/ppc: Use object_initialize_child for correct reference counting |
Date: |
Fri, 22 Feb 2019 07:20:14 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 |
On 21/02/2019 19.14, Philippe Mathieu-Daudé wrote:
> On 2/21/19 12:24 PM, Thomas Huth wrote:
>> 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.
>>
>> Suggested-by: Eduardo Habkost <address@hidden>
>> Signed-off-by: Thomas Huth <address@hidden>
>> ---
>> hw/ppc/pnv.c | 12 ++++++------
>> hw/ppc/pnv_psi.c | 4 ++--
>> hw/ppc/spapr.c | 6 +++---
>> 3 files changed, 11 insertions(+), 11 deletions(-)
>>
>> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
>> index da54086..9e03e9c 100644
>> --- a/hw/ppc/pnv.c
>> +++ b/hw/ppc/pnv.c
>> @@ -736,18 +736,18 @@ static void pnv_chip_power8_instance_init(Object *obj)
>> {
>> Pnv8Chip *chip8 = PNV8_CHIP(obj);
>>
>> - object_initialize(&chip8->psi, sizeof(chip8->psi), TYPE_PNV_PSI);
>> - object_property_add_child(obj, "psi", OBJECT(&chip8->psi), NULL);
>> + object_initialize_child(obj, "psi", &chip8->psi, sizeof(chip8->psi),
>> + TYPE_PNV_PSI, &error_abort, NULL);
>> object_property_add_const_link(OBJECT(&chip8->psi), "xics",
>> OBJECT(qdev_get_machine()),
>> &error_abort);
>>
>> - object_initialize(&chip8->lpc, sizeof(chip8->lpc), TYPE_PNV_LPC);
>> - object_property_add_child(obj, "lpc", OBJECT(&chip8->lpc), NULL);
>> + object_initialize_child(obj, "lpc", &chip8->lpc, sizeof(chip8->lpc),
>> + TYPE_PNV_LPC, &error_abort, NULL);
>> object_property_add_const_link(OBJECT(&chip8->lpc), "psi",
>> OBJECT(&chip8->psi), &error_abort);
>>
>> - object_initialize(&chip8->occ, sizeof(chip8->occ), TYPE_PNV_OCC);
>> - object_property_add_child(obj, "occ", OBJECT(&chip8->occ), NULL);
>> + object_initialize_child(obj, "occ", &chip8->occ, sizeof(chip8->occ),
>> + TYPE_PNV_OCC, &error_abort, NULL);
>> object_property_add_const_link(OBJECT(&chip8->occ), "psi",
>> OBJECT(&chip8->psi), &error_abort);
>> }
>> diff --git a/hw/ppc/pnv_psi.c b/hw/ppc/pnv_psi.c
>> index 8ced095..44bc0cb 100644
>> --- a/hw/ppc/pnv_psi.c
>> +++ b/hw/ppc/pnv_psi.c
>> @@ -444,8 +444,8 @@ static void pnv_psi_init(Object *obj)
>> {
>> PnvPsi *psi = PNV_PSI(obj);
>>
>> - object_initialize(&psi->ics, sizeof(psi->ics), TYPE_ICS_SIMPLE);
>> - object_property_add_child(obj, "ics-psi", OBJECT(&psi->ics), NULL);
>> + object_initialize_child(obj, "ics-psi", &psi->ics, sizeof(psi->ics),
>> + TYPE_ICS_SIMPLE, &error_abort, NULL);
>> }
>>
>> static const uint8_t irq_to_xivr[] = {
>> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
>> index abf9ebc..6c58dca 100644
>> --- a/hw/ppc/spapr.c
>> +++ b/hw/ppc/spapr.c
>> @@ -1696,9 +1696,9 @@ static void spapr_create_nvram(sPAPRMachineState
>> *spapr)
>>
>> static void spapr_rtc_create(sPAPRMachineState *spapr)
>> {
>> - object_initialize(&spapr->rtc, sizeof(spapr->rtc), TYPE_SPAPR_RTC);
>> - object_property_add_child(OBJECT(spapr), "rtc", OBJECT(&spapr->rtc),
>> - &error_fatal);
>> + object_initialize_child(OBJECT(spapr), "rtc",
>> + &spapr->rtc, sizeof(spapr->rtc), TYPE_SPAPR_RTC,
>> + &error_fatal, NULL);
>> object_property_set_bool(OBJECT(&spapr->rtc), true, "realized",
>> &error_fatal);
>> object_property_add_alias(OBJECT(spapr), "rtc-time",
>> OBJECT(&spapr->rtc),
>>
>
> What about intc/spapr_xive.c?
Good hint. I missed that one since it's in hw/intc, not in hw/ppc...
David, could you please squash this on top:
diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index 290a290..ac5f5ef 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -244,13 +244,12 @@ static void spapr_xive_instance_init(Object *obj)
{
sPAPRXive *xive = SPAPR_XIVE(obj);
- object_initialize(&xive->source, sizeof(xive->source), TYPE_XIVE_SOURCE);
- object_property_add_child(obj, "source", OBJECT(&xive->source), NULL);
+ object_initialize_child(obj, "source", &xive->source, sizeof(xive->source),
+ TYPE_XIVE_SOURCE, &error_abort, NULL);
- object_initialize(&xive->end_source, sizeof(xive->end_source),
- TYPE_XIVE_END_SOURCE);
- object_property_add_child(obj, "end_source", OBJECT(&xive->end_source),
- NULL);
+ object_initialize_child(obj, "end_source", &xive->end_source,
+ sizeof(xive->end_source), TYPE_XIVE_END_SOURCE,
+ &error_abort, NULL);
}
static void spapr_xive_realize(DeviceState *dev, Error **errp)
... or shall I rather send a v2 or a separate patch for this?
Thomas