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>

7 files changed, 21 insertions, 34 deletions

diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index ae31f0817a..e670f1e595 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -239,22 +239,18 @@ static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
     VirtIOBalloon *s = opaque;
     int i;
 
-    visit_start_struct(v, name, NULL, 0, &err);
-    if (err) {
+    if (!visit_start_struct(v, name, NULL, 0, &err)) {
         goto out;
     }
-    visit_type_int(v, "last-update", &s->stats_last_update, &err);
-    if (err) {
+    if (!visit_type_int(v, "last-update", &s->stats_last_update, &err)) {
         goto out_end;
     }
 
-    visit_start_struct(v, "stats", NULL, 0, &err);
-    if (err) {
+    if (!visit_start_struct(v, "stats", NULL, 0, &err)) {
         goto out_end;
     }
     for (i = 0; i < VIRTIO_BALLOON_S_NR; i++) {
-        visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], &err);
-        if (err) {
+        if (!visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], &err)) {
             goto out_nested;
         }
     }
@@ -284,12 +280,9 @@ static void balloon_stats_set_poll_interval(Object *obj, Visitor *v,
                                             Error **errp)
 {
     VirtIOBalloon *s = opaque;
-    Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
+    if (!visit_type_int(v, name, &value, errp)) {
         return;
     }
 
diff --git a/hw/virtio/virtio-crypto-pci.c b/hw/virtio/virtio-crypto-pci.c
index 72be531c95..f1cc979d33 100644
--- a/hw/virtio/virtio-crypto-pci.c
+++ b/hw/virtio/virtio-crypto-pci.c
@@ -54,10 +54,11 @@ static void virtio_crypto_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     }
 
     virtio_pci_force_virtio_1(vpci_dev);
-    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
-    object_property_set_link(OBJECT(vcrypto),
-                 OBJECT(vcrypto->vdev.conf.cryptodev), "cryptodev",
-                 NULL);
+    if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
+        return;
+    }
+    object_property_set_link(OBJECT(vcrypto), "cryptodev",
+                             OBJECT(vcrypto->vdev.conf.cryptodev), NULL);
 }
 
 static void virtio_crypto_pci_class_init(ObjectClass *klass, void *data)
diff --git a/hw/virtio/virtio-iommu-pci.c b/hw/virtio/virtio-iommu-pci.c
index 592abc9279..ba62d60a0a 100644
--- a/hw/virtio/virtio-iommu-pci.c
+++ b/hw/virtio/virtio-iommu-pci.c
@@ -65,9 +65,9 @@ static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
             error_append_hint(errp, "Valid values are 0 and 1\n");
         }
     }
-    object_property_set_link(OBJECT(dev),
+    object_property_set_link(OBJECT(dev), "primary-bus",
                              OBJECT(pci_get_bus(&vpci_dev->pci_dev)),
-                             "primary-bus", &error_abort);
+                             &error_abort);
     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
 }
 
diff --git a/hw/virtio/virtio-mem-pci.c b/hw/virtio/virtio-mem-pci.c
index 1a8e854123..d375280ee1 100644
--- a/hw/virtio/virtio-mem-pci.c
+++ b/hw/virtio/virtio-mem-pci.c
@@ -22,13 +22,13 @@ static void virtio_mem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     DeviceState *vdev = DEVICE(&mem_pci->vdev);
 
     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
-    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+    object_property_set_bool(OBJECT(vdev), "realized", true, errp);
 }
 
 static void virtio_mem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
                                     Error **errp)
 {
-    object_property_set_uint(OBJECT(md), addr, VIRTIO_MEM_ADDR_PROP, errp);
+    object_property_set_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP, addr, errp);
 }
 
 static uint64_t virtio_mem_pci_get_addr(const MemoryDeviceState *md)
diff --git a/hw/virtio/virtio-pmem-pci.c b/hw/virtio/virtio-pmem-pci.c
index 11d0c8ebc6..21a457d151 100644
--- a/hw/virtio/virtio-pmem-pci.c
+++ b/hw/virtio/virtio-pmem-pci.c
@@ -28,7 +28,7 @@ static void virtio_pmem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 static void virtio_pmem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
                                      Error **errp)
 {
-    object_property_set_uint(OBJECT(md), addr, VIRTIO_PMEM_ADDR_PROP, errp);
+    object_property_set_uint(OBJECT(md), VIRTIO_PMEM_ADDR_PROP, addr, errp);
 }
 
 static uint64_t virtio_pmem_pci_get_addr(const MemoryDeviceState *md)
diff --git a/hw/virtio/virtio-rng-pci.c b/hw/virtio/virtio-rng-pci.c
index cf1afb47a6..2f0b529b62 100644
--- a/hw/virtio/virtio-rng-pci.c
+++ b/hw/virtio/virtio-rng-pci.c
@@ -34,16 +34,12 @@ static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 {
     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
     DeviceState *vdev = DEVICE(&vrng->vdev);
-    Error *err = NULL;
 
-    qdev_realize(vdev, BUS(&vpci_dev->bus), &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
         return;
     }
 
-    object_property_set_link(OBJECT(vrng),
-                             OBJECT(vrng->vdev.conf.rng), "rng",
+    object_property_set_link(OBJECT(vrng), "rng", OBJECT(vrng->vdev.conf.rng),
                              NULL);
 }
 
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;