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[Qemu-devel] [PATCH 1/1] target-i386: Clean up misuse of qdev_init() in

From: Markus Armbruster
Subject: [Qemu-devel] [PATCH 1/1] target-i386: Clean up misuse of qdev_init() in realize method
Date: Thu, 5 Feb 2015 10:29:15 +0100

x86_cpu_apic_realize() calls qdev_init() to realize the APIC.
qdev_init()'s error handling has unwanted side effects: it unparents
the device, and it calls qerror_report_err().

qerror_report_err() is always inappropriate in realize methods,
because it doesn't return the Error object.  It either reports the
error to stderr or the human monitor, or it stores it in the QMP
monitor, where it makes the QMP command fail even though the realize
method succeeded.

Fortunately, qdev_init() can't actually fail here, because realize
can't fail for any of the three possible APIC device models.

Clean up by cutting out the qdev_init() middle-man: set property
"realized" directly.

Signed-off-by: Markus Armbruster <address@hidden>
 target-i386/cpu.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 3a9b32e..2a82407 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2752,12 +2752,8 @@ static void x86_cpu_apic_realize(X86CPU *cpu, Error 
     if (cpu->apic_state == NULL) {
-    if (qdev_init(cpu->apic_state)) {
-        error_setg(errp, "APIC device '%s' could not be initialized",
-                   object_get_typename(OBJECT(cpu->apic_state)));
-        return;
-    }
+    object_property_set_bool(OBJECT(cpu->apic_state), true, "realized",
+                             errp);
 static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)

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