Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2020-07-07-v2' into staging

Error reporting patches patches for 2020-07-07

# gpg: Signature made Fri 10 Jul 2020 14:24:42 BST
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-error-2020-07-07-v2: (53 commits)
  xen: Use ERRP_GUARD()
  nbd: Use ERRP_GUARD()
  virtio-9p: Use ERRP_GUARD()
  fw_cfg: Use ERRP_GUARD()
  pflash: Use ERRP_GUARD()
  sd: Use ERRP_GUARD()
  scripts: Coccinelle script to use ERRP_GUARD()
  error: New macro ERRP_GUARD()
  hmp: Ignore Error objects where the return value suffices
  qdev: Ignore Error objects where the return value suffices
  qemu-img: Ignore Error objects where the return value suffices
  error: Avoid error_propagate() after migrate_add_blocker()
  qapi: Purge error_propagate() from QAPI core
  qapi: Smooth visitor error checking in generated code
  qapi: Smooth another visitor error checking pattern
  block/parallels: Simplify parallels_open() after previous commit
  error: Reduce unnecessary error propagation
  error: Eliminate error_propagate() manually
  error: Eliminate error_propagate() with Coccinelle, part 2
  error: Eliminate error_propagate() with Coccinelle, part 1
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 4 insertions, 7 deletions

diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index a8df41b11b..2886c0ce2a 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -176,7 +176,6 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIORNG *vrng = VIRTIO_RNG(dev);
-    Error *local_err = NULL;
 
     if (vrng->conf.period_ms <= 0) {
         error_setg(errp, "'period' parameter expects a positive integer");
@@ -194,10 +193,8 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
     if (vrng->conf.rng == NULL) {
         Object *default_backend = object_new(TYPE_RNG_BUILTIN);
 
-        user_creatable_complete(USER_CREATABLE(default_backend),
-                                &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
+        if (!user_creatable_complete(USER_CREATABLE(default_backend),
+                                     errp)) {
             object_unref(default_backend);
             return;
         }
@@ -208,8 +205,8 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
         /* The child property took a reference, we can safely drop ours now */
         object_unref(default_backend);
 
-        object_property_set_link(OBJECT(dev), default_backend,
-                                 "rng", &error_abort);
+        object_property_set_link(OBJECT(dev), "rng", default_backend,
+                                 &error_abort);
     }
 
     vrng->rng = vrng->conf.rng;