[Qemu-devel] [PATCH 1/3] PPC: Clean up misuse of qdev_init() in kvm-openpic creation

[Markus Armbruster <armbru@redhat.com>]

We call ppce500_init_mpic_kvm() to create a "kvm-openpic".  If it
fails, we call ppce500_init_mpic_qemu() to fall back to plain
"openpic".

ppce500_init_mpic_kvm() uses qdev_init().  qdev_init()'s error
handling has an unwanted side effect: it calls qerror_report_err(),
which prints to stderr.  Looks like an error, but isn't.

In QMP context, it would stash the error in the monitor instead,
making the QMP command fail.  Fortunately, it's only called from board
initialization, never in QMP context.

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

While there, improve the error message when we can't satisfy an
explicit user request for "kvm-openpic", and exit(1) instead of
abort().

Cc: Alexander Graf <agraf@suse.de>
Cc: Scott Wood <scottwood@freescale.com>
Cc: qemu-ppc@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/ppc/e500.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 7e17d18..fd0d138 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -706,17 +706,19 @@ static DeviceState *ppce500_init_mpic_qemu(PPCE500Params *params,
 }
 
 static DeviceState *ppce500_init_mpic_kvm(PPCE500Params *params,
-                                          qemu_irq **irqs)
+                                          qemu_irq **irqs, Error **errp)
 {
+    Error *err = NULL;
     DeviceState *dev;
     CPUState *cs;
-    int r;
 
     dev = qdev_create(NULL, TYPE_KVM_OPENPIC);
     qdev_prop_set_uint32(dev, "model", params->mpic_version);
 
-    r = qdev_init(dev);
-    if (r) {
+    object_property_set_bool(OBJECT(dev), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        object_unparent(OBJECT(dev));
         return NULL;
     }
 
@@ -747,15 +749,15 @@ static qemu_irq *ppce500_init_mpic(PPCE500Params *params, MemoryRegion *ccsr,
                                                 "kernel_irqchip", true);
         bool irqchip_required = qemu_opt_get_bool(machine_opts,
                                                   "kernel_irqchip", false);
+        Error *err = NULL;
 
         if (irqchip_allowed) {
-            dev = ppce500_init_mpic_kvm(params, irqs);
+            dev = ppce500_init_mpic_kvm(params, irqs, &err);
         }
-
         if (irqchip_required && !dev) {
-            fprintf(stderr, "%s: irqchip requested but unavailable\n",
-                    __func__);
-            abort();
+            error_report("kernel_irqchip requested but unavailable: %s",
+                         error_get_pretty(err));
+            exit(1);
         }
     }
 
-- 
1.9.3