[PULL 21/28] mips/cps: Fix mips_cps_realize() error API violations

[Markus Armbruster <armbru@redhat.com>]

The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL.  Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call.

mips_cps_realize() is wrong that way: it passes &err to multiple
object_property_set_FOO() without checking for failure, and then to
sysbus_realize().  Harmless, because the object_property_set_FOO()
can't actually fail here.

Fix by passing &error_abort instead.

Cc: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200630090351.1247703-20-armbru@redhat.com>
---
 hw/mips/cps.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index 5382bc86f7..0d7f3cf673 100644
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -100,10 +100,12 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
     /* Inter-Thread Communication Unit */
     if (itu_present) {
         object_initialize_child(OBJECT(dev), "itu", &s->itu, TYPE_MIPS_ITU);
-        object_property_set_int(OBJECT(&s->itu), 16, "num-fifo", &err);
-        object_property_set_int(OBJECT(&s->itu), 16, "num-semaphores", &err);
+        object_property_set_int(OBJECT(&s->itu), 16, "num-fifo",
+                                &error_abort);
+        object_property_set_int(OBJECT(&s->itu), 16, "num-semaphores",
+                                &error_abort);
         object_property_set_bool(OBJECT(&s->itu), saar_present, "saar-present",
-                                 &err);
+                                 &error_abort);
         if (saar_present) {
             s->itu.saar = &env->CP0_SAAR;
         }
@@ -119,8 +121,10 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
 
     /* Cluster Power Controller */
     object_initialize_child(OBJECT(dev), "cpc", &s->cpc, TYPE_MIPS_CPC);
-    object_property_set_int(OBJECT(&s->cpc), s->num_vp, "num-vp", &err);
-    object_property_set_int(OBJECT(&s->cpc), 1, "vp-start-running", &err);
+    object_property_set_int(OBJECT(&s->cpc), s->num_vp, "num-vp",
+                            &error_abort);
+    object_property_set_int(OBJECT(&s->cpc), 1, "vp-start-running",
+                            &error_abort);
     sysbus_realize(SYS_BUS_DEVICE(&s->cpc), &err);
     if (err != NULL) {
         error_propagate(errp, err);
@@ -132,8 +136,10 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
 
     /* Global Interrupt Controller */
     object_initialize_child(OBJECT(dev), "gic", &s->gic, TYPE_MIPS_GIC);
-    object_property_set_int(OBJECT(&s->gic), s->num_vp, "num-vp", &err);
-    object_property_set_int(OBJECT(&s->gic), 128, "num-irq", &err);
+    object_property_set_int(OBJECT(&s->gic), s->num_vp, "num-vp",
+                            &error_abort);
+    object_property_set_int(OBJECT(&s->gic), 128, "num-irq",
+                            &error_abort);
     sysbus_realize(SYS_BUS_DEVICE(&s->gic), &err);
     if (err != NULL) {
         error_propagate(errp, err);
@@ -147,9 +153,12 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
     gcr_base = env->CP0_CMGCRBase << 4;
 
     object_initialize_child(OBJECT(dev), "gcr", &s->gcr, TYPE_MIPS_GCR);
-    object_property_set_int(OBJECT(&s->gcr), s->num_vp, "num-vp", &err);
-    object_property_set_int(OBJECT(&s->gcr), 0x800, "gcr-rev", &err);
-    object_property_set_int(OBJECT(&s->gcr), gcr_base, "gcr-base", &err);
+    object_property_set_int(OBJECT(&s->gcr), s->num_vp, "num-vp",
+                            &error_abort);
+    object_property_set_int(OBJECT(&s->gcr), 0x800, "gcr-rev",
+                            &error_abort);
+    object_property_set_int(OBJECT(&s->gcr), gcr_base, "gcr-base",
+                            &error_abort);
     object_property_set_link(OBJECT(&s->gcr), OBJECT(&s->gic.mr), "gic",
                              &error_abort);
     object_property_set_link(OBJECT(&s->gcr), OBJECT(&s->cpc.mr), "cpc",
-- 
2.26.2