error: Clean up unusual names of Error * variables

Local Error * variables are conventionally named @err or @local_err,
and Error ** parameters @errp.  Naming local variables like parameters
is confusing.  Clean that up.

Naming parameters like local variables is also confusing.  Left for
another day.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191204093625.14836-17-armbru@redhat.com>
diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c
index c9ee80e..30d50c2 100644
--- a/hw/intc/s390_flic_kvm.c
+++ b/hw/intc/s390_flic_kvm.c
@@ -582,10 +582,10 @@
     struct kvm_create_device cd = {0};
     struct kvm_device_attr test_attr = {0};
     int ret;
-    Error *errp_local = NULL;
+    Error *err = NULL;
 
-    KVM_S390_FLIC_GET_CLASS(dev)->parent_realize(dev, &errp_local);
-    if (errp_local) {
+    KVM_S390_FLIC_GET_CLASS(dev)->parent_realize(dev, &err);
+    if (err) {
         goto fail;
     }
     flic_state->fd = -1;
@@ -593,7 +593,7 @@
     cd.type = KVM_DEV_TYPE_FLIC;
     ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd);
     if (ret < 0) {
-        error_setg_errno(&errp_local, errno, "Creating the KVM device failed");
+        error_setg_errno(&err, errno, "Creating the KVM device failed");
         trace_flic_create_device(errno);
         goto fail;
     }
@@ -605,7 +605,7 @@
                                             KVM_HAS_DEVICE_ATTR, test_attr);
     return;
 fail:
-    error_propagate(errp, errp_local);
+    error_propagate(errp, err);
 }
 
 static void kvm_s390_flic_reset(DeviceState *dev)