error: Move ERRP_GUARD() to the beginning of the function

Since the commit 05e385d2a9 ("error: Move ERRP_GUARD() to the beginning
of the function"), there are new codes that don't put ERRP_GUARD() at
the beginning of the functions.

As stated in the commit 05e385d2a9: "include/qapi/error.h advises to put
ERRP_GUARD() right at the beginning of the function, because only then
can it guard the whole function.", so clean up the few spots
disregarding the advice.

Inspired-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240312060337.3240965-1-zhao1.liu@linux.intel.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

block.c

@@ -534,9 +534,9 @@ typedef struct CreateCo {
 int coroutine_fn bdrv_co_create(BlockDriver *drv, const char *filename,
                                 QemuOpts *opts, Error **errp)
 {
+    ERRP_GUARD();
     int ret;
     GLOBAL_STATE_CODE();
-    ERRP_GUARD();
 
     if (!drv->bdrv_co_create_opts) {
         error_setg(errp, "Driver '%s' does not support image creation",

block/qapi.c

@@ -46,11 +46,11 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
                                         bool flat,
                                         Error **errp)
 {
+    ERRP_GUARD();
     ImageInfo **p_image_info;
     ImageInfo *backing_info;
     BlockDriverState *backing;
     BlockDeviceInfo *info;
-    ERRP_GUARD();
 
     if (!bs->drv) {
         error_setg(errp, "Block device %s is ejected", bs->node_name);
@@ -330,8 +330,8 @@ void bdrv_query_image_info(BlockDriverState *bs,
                            bool skip_implicit_filters,
                            Error **errp)
 {
-    ImageInfo *info;
     ERRP_GUARD();
+    ImageInfo *info;
 
     info = g_new0(ImageInfo, 1);
     bdrv_do_query_node_info(bs, qapi_ImageInfo_base(info), errp);
@@ -382,10 +382,10 @@ void bdrv_query_block_graph_info(BlockDriverState *bs,
                                  BlockGraphInfo **p_info,
                                  Error **errp)
 {
+    ERRP_GUARD();
     BlockGraphInfo *info;
     BlockChildInfoList **children_list_tail;
     BdrvChild *c;
-    ERRP_GUARD();
 
     info = g_new0(BlockGraphInfo, 1);
     bdrv_do_query_node_info(bs, qapi_BlockGraphInfo_base(info), errp);

hw/s390x/s390-virtio-ccw.c

@@ -312,9 +312,9 @@ static void ccw_init(MachineState *machine)
 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
                         DeviceState *dev, Error **errp)
 {
+    ERRP_GUARD();
     MachineState *ms = MACHINE(hotplug_dev);
     S390CPU *cpu = S390_CPU(dev);
-    ERRP_GUARD();
 
     g_assert(!ms->possible_cpus->cpus[cpu->env.core_id].cpu);
     ms->possible_cpus->cpus[cpu->env.core_id].cpu = OBJECT(dev);

migration/options.c

@@ -478,9 +478,9 @@ static bool migrate_incoming_started(void)
  */
 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
 {
+    ERRP_GUARD();
     MigrationIncomingState *mis = migration_incoming_get_current();
 
-    ERRP_GUARD();
 #ifndef CONFIG_LIVE_BLOCK_MIGRATION
     if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
         error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) "

migration/postcopy-ram.c

@@ -283,10 +283,10 @@ static bool request_ufd_features(int ufd, uint64_t features)
 static bool ufd_check_and_apply(int ufd, MigrationIncomingState *mis,
                                 Error **errp)
 {
+    ERRP_GUARD();
     uint64_t asked_features = 0;
     static uint64_t supported_features;
 
-    ERRP_GUARD();
     /*
      * it's not possible to
      * request UFFD_API twice per one fd
@@ -371,6 +371,7 @@ static int test_ramblock_postcopiable(RAMBlock *rb, Error **errp)
  */
 bool postcopy_ram_supported_by_host(MigrationIncomingState *mis, Error **errp)
 {
+    ERRP_GUARD();
     long pagesize = qemu_real_host_page_size();
     int ufd = -1;
     bool ret = false; /* Error unless we change it */
@@ -380,7 +381,6 @@ bool postcopy_ram_supported_by_host(MigrationIncomingState *mis, Error **errp)
     uint64_t feature_mask;
     RAMBlock *block;
 
-    ERRP_GUARD();
     if (qemu_target_page_size() > pagesize) {
         error_setg(errp, "Target page size bigger than host page size");
         goto out;

net/vhost-vdpa.c

@@ -1557,14 +1557,13 @@ static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = {
 static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features,
                                           int cvq_index, Error **errp)
 {
+    ERRP_GUARD();
     uint64_t backend_features;
     int64_t cvq_group;
     uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE |
                      VIRTIO_CONFIG_S_DRIVER;
     int r;
 
-    ERRP_GUARD();
-
     r = ioctl(device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features);
     if (unlikely(r < 0)) {
         error_setg_errno(errp, errno, "Cannot get vdpa backend_features");