qapi: Use returned bool to check for failure, manual part

The previous commit used Coccinelle to convert from checking the Error
object to checking the return value.  Convert a few more manually.
Also tweak control flow in places to conform to the conventional "if
error bail out" pattern.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200707160613.848843-20-armbru@redhat.com>

1 files changed, 23 insertions, 27 deletions

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 375e29fb69..ab1a6ff0ee 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -3128,37 +3128,33 @@ static void kvm_set_kernel_irqchip(Object *obj, Visitor *v,
                                    const char *name, void *opaque,
                                    Error **errp)
 {
-    Error *err = NULL;
     KVMState *s = KVM_STATE(obj);
     OnOffSplit mode;
 
-    visit_type_OnOffSplit(v, name, &mode, &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!visit_type_OnOffSplit(v, name, &mode, errp)) {
         return;
-    } else {
-        switch (mode) {
-        case ON_OFF_SPLIT_ON:
-            s->kernel_irqchip_allowed = true;
-            s->kernel_irqchip_required = true;
-            s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
-            break;
-        case ON_OFF_SPLIT_OFF:
-            s->kernel_irqchip_allowed = false;
-            s->kernel_irqchip_required = false;
-            s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
-            break;
-        case ON_OFF_SPLIT_SPLIT:
-            s->kernel_irqchip_allowed = true;
-            s->kernel_irqchip_required = true;
-            s->kernel_irqchip_split = ON_OFF_AUTO_ON;
-            break;
-        default:
-            /* The value was checked in visit_type_OnOffSplit() above. If
-             * we get here, then something is wrong in QEMU.
-             */
-            abort();
-        }
+    }
+    switch (mode) {
+    case ON_OFF_SPLIT_ON:
+        s->kernel_irqchip_allowed = true;
+        s->kernel_irqchip_required = true;
+        s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
+        break;
+    case ON_OFF_SPLIT_OFF:
+        s->kernel_irqchip_allowed = false;
+        s->kernel_irqchip_required = false;
+        s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
+        break;
+    case ON_OFF_SPLIT_SPLIT:
+        s->kernel_irqchip_allowed = true;
+        s->kernel_irqchip_required = true;
+        s->kernel_irqchip_split = ON_OFF_AUTO_ON;
+        break;
+    default:
+        /* The value was checked in visit_type_OnOffSplit() above. If
+         * we get here, then something is wrong in QEMU.
+         */
+        abort();
     }
 }