From 62a35aaa310807fa161ca041ddb0f308faeb582b Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Tue, 7 Jul 2020 18:05:46 +0200
Subject: [PATCH] qapi: Use returned bool to check for failure, Coccinelle part

The previous commit enables conversion of

    visit_foo(..., &err);
    if (err) {
        ...
    }

to

    if (!visit_foo(..., errp)) {
        ...
    }

for visitor functions that now return true / false on success / error.
Coccinelle script:

    @@
    identifier fun =~ "check_list|input_type_enum|lv_start_struct|lv_type_bool|lv_type_int64|lv_type_str|lv_type_uint64|output_type_enum|parse_type_bool|parse_type_int64|parse_type_null|parse_type_number|parse_type_size|parse_type_str|parse_type_uint64|print_type_bool|print_type_int64|print_type_null|print_type_number|print_type_size|print_type_str|print_type_uint64|qapi_clone_start_alternate|qapi_clone_start_list|qapi_clone_start_struct|qapi_clone_type_bool|qapi_clone_type_int64|qapi_clone_type_null|qapi_clone_type_number|qapi_clone_type_str|qapi_clone_type_uint64|qapi_dealloc_start_list|qapi_dealloc_start_struct|qapi_dealloc_type_anything|qapi_dealloc_type_bool|qapi_dealloc_type_int64|qapi_dealloc_type_null|qapi_dealloc_type_number|qapi_dealloc_type_str|qapi_dealloc_type_uint64|qobject_input_check_list|qobject_input_check_struct|qobject_input_start_alternate|qobject_input_start_list|qobject_input_start_struct|qobject_input_type_any|qobject_input_type_bool|qobject_input_type_bool_keyval|qobject_input_type_int64|qobject_input_type_int64_keyval|qobject_input_type_null|qobject_input_type_number|qobject_input_type_number_keyval|qobject_input_type_size_keyval|qobject_input_type_str|qobject_input_type_str_keyval|qobject_input_type_uint64|qobject_input_type_uint64_keyval|qobject_output_start_list|qobject_output_start_struct|qobject_output_type_any|qobject_output_type_bool|qobject_output_type_int64|qobject_output_type_null|qobject_output_type_number|qobject_output_type_str|qobject_output_type_uint64|start_list|visit_check_list|visit_check_struct|visit_start_alternate|visit_start_list|visit_start_struct|visit_type_.*";
    expression list args;
    typedef Error;
    Error *err;
    @@
    -    fun(args, &err);
    -    if (err)
    +    if (!fun(args, &err))
         {
             ...
         }

A few line breaks tidied up manually.

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: <20200707160613.848843-19-armbru@redhat.com>
---
 accel/kvm/kvm-all.c              |  3 +--
 accel/tcg/tcg-all.c              |  3 +--
 backends/cryptodev.c             |  3 +--
 backends/hostmem-file.c          |  3 +--
 backends/hostmem-memfd.c         |  3 +--
 backends/hostmem.c               |  6 ++---
 backends/tpm/tpm_util.c          |  3 +--
 block/blkdebug.c                 |  3 +--
 block/nbd.c                      |  3 +--
 block/sheepdog.c                 |  3 +--
 block/throttle-groups.c          |  6 ++---
 bootdevice.c                     |  3 +--
 hw/block/xen-block.c             |  3 +--
 hw/core/machine.c                |  3 +--
 hw/core/qdev-properties-system.c | 12 +++------
 hw/core/qdev-properties.c        | 38 +++++++++++------------------
 hw/cpu/core.c                    |  6 ++---
 hw/gpio/aspeed_gpio.c            |  3 +--
 hw/i386/pc.c                     |  3 +--
 hw/ide/qdev.c                    |  3 +--
 hw/intc/apic_common.c            |  3 +--
 hw/mem/nvdimm.c                  |  6 ++---
 hw/misc/aspeed_sdmc.c            |  3 +--
 hw/misc/pca9552.c                |  3 +--
 hw/misc/tmp105.c                 |  3 +--
 hw/misc/tmp421.c                 |  3 +--
 hw/net/ne2000-isa.c              |  3 +--
 hw/ppc/spapr_caps.c              |  9 +++----
 hw/ppc/spapr_drc.c               | 10 +++-----
 hw/s390x/css.c                   |  3 +--
 hw/usb/dev-storage.c             |  3 +--
 hw/vfio/pci-quirks.c             |  3 +--
 hw/virtio/virtio-balloon.c       | 15 ++++--------
 iothread.c                       |  3 +--
 monitor/hmp-cmds.c               |  3 +--
 net/colo-compare.c               |  6 ++---
 net/dump.c                       |  3 +--
 net/filter-buffer.c              |  3 +--
 qom/object.c                     | 42 +++++++++++---------------------
 qom/object_interfaces.c          |  3 +--
 target/arm/cpu64.c               |  9 +++----
 target/arm/monitor.c             |  3 +--
 target/i386/cpu.c                | 15 ++++--------
 target/ppc/compat.c              |  3 +--
 target/s390x/cpu_models.c        |  9 +++----
 target/sparc/cpu.c               |  3 +--
 46 files changed, 97 insertions(+), 188 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index ab36fbfa0c..375e29fb69 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -3116,8 +3116,7 @@ static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v,
     Error *error = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &error);
-    if (error) {
+    if (!visit_type_int(v, name, &value, &error)) {
         error_propagate(errp, error);
         return;
     }
diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index 3b4fda5640..d6b3d7fc07 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -185,8 +185,7 @@ static void tcg_set_tb_size(Object *obj, Visitor *v,
     Error *error = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &error);
-    if (error) {
+    if (!visit_type_uint32(v, name, &value, &error)) {
         error_propagate(errp, error);
         return;
     }
diff --git a/backends/cryptodev.c b/backends/cryptodev.c
index a3841c4e41..7e7265102e 100644
--- a/backends/cryptodev.c
+++ b/backends/cryptodev.c
@@ -157,8 +157,7 @@ cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c
index cdabb412e6..320dffbaa9 100644
--- a/backends/hostmem-file.c
+++ b/backends/hostmem-file.c
@@ -119,8 +119,7 @@ static void file_memory_backend_set_align(Object *o, Visitor *v,
         goto out;
     }
 
-    visit_type_size(v, name, &val, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &val, &local_err)) {
         goto out;
     }
     fb->align = val;
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c
index 1b5e4bfe0d..d4281c0032 100644
--- a/backends/hostmem-memfd.c
+++ b/backends/hostmem-memfd.c
@@ -85,8 +85,7 @@ memfd_backend_set_hugetlbsize(Object *obj, Visitor *v, const char *name,
         goto out;
     }
 
-    visit_type_size(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
diff --git a/backends/hostmem.c b/backends/hostmem.c
index 61e3255f5c..4e4103ac09 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -63,8 +63,7 @@ host_memory_backend_set_size(Object *obj, Visitor *v, const char *name,
         goto out;
     }
 
-    visit_type_size(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
@@ -257,8 +256,7 @@ static void host_memory_backend_set_prealloc_threads(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (value <= 0) {
diff --git a/backends/tpm/tpm_util.c b/backends/tpm/tpm_util.c
index cfc7572a61..971f3af047 100644
--- a/backends/tpm/tpm_util.c
+++ b/backends/tpm/tpm_util.c
@@ -58,8 +58,7 @@ static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/block/blkdebug.c b/block/blkdebug.c
index d473dcf8c7..3c0a9d45cc 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -375,8 +375,7 @@ static int blkdebug_parse_perm_list(uint64_t *dest, QDict *options,
     }
 
     v = qobject_input_visitor_new(crumpled_subqdict);
-    visit_type_BlockPermissionList(v, NULL, &perm_list, &local_err);
-    if (local_err) {
+    if (!visit_type_BlockPermissionList(v, NULL, &perm_list, &local_err)) {
         error_propagate(errp, local_err);
         ret = -EINVAL;
         goto out;
diff --git a/block/nbd.c b/block/nbd.c
index 1b30d96a4f..1331307ffb 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1739,8 +1739,7 @@ static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options,
         goto done;
     }
 
-    visit_type_SocketAddress(iv, NULL, &saddr, &local_err);
-    if (local_err) {
+    if (!visit_type_SocketAddress(iv, NULL, &saddr, &local_err)) {
         error_propagate(errp, local_err);
         goto done;
     }
diff --git a/block/sheepdog.c b/block/sheepdog.c
index a8d396dcdf..e3bcb05f60 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -541,8 +541,7 @@ static SocketAddress *sd_server_config(QDict *options, Error **errp)
         goto done;
     }
 
-    visit_type_SocketAddress(iv, NULL, &saddr, &local_err);
-    if (local_err) {
+    if (!visit_type_SocketAddress(iv, NULL, &saddr, &local_err)) {
         error_propagate(errp, local_err);
         goto done;
     }
diff --git a/block/throttle-groups.c b/block/throttle-groups.c
index 784fa4a16c..bb242fde1a 100644
--- a/block/throttle-groups.c
+++ b/block/throttle-groups.c
@@ -823,8 +823,7 @@ static void throttle_group_set(Object *obj, Visitor *v, const char * name,
         goto ret;
     }
 
-    visit_type_int64(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int64(v, name, &value, &local_err)) {
         goto ret;
     }
     if (value < 0) {
@@ -896,8 +895,7 @@ static void throttle_group_set_limits(Object *obj, Visitor *v,
     ThrottleLimits *argp;
     Error *local_err = NULL;
 
-    visit_type_ThrottleLimits(v, name, &argp, &local_err);
-    if (local_err) {
+    if (!visit_type_ThrottleLimits(v, name, &argp, &local_err)) {
         goto ret;
     }
     qemu_mutex_lock(&tg->lock);
diff --git a/bootdevice.c b/bootdevice.c
index 0ff55e2b79..fb09d3c668 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -297,8 +297,7 @@ static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    visit_type_int32(v, name, &boot_index, &local_err);
-    if (local_err) {
+    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
         goto out;
     }
     /* check whether bootindex is present in fw_boot_order list  */
diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c
index 10c44dfda2..48890536a4 100644
--- a/hw/block/xen-block.c
+++ b/hw/block/xen-block.c
@@ -412,8 +412,7 @@ static void xen_block_set_vdev(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 211b4e077a..7ff0af93ef 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -293,8 +293,7 @@ static void machine_set_phandle_start(Object *obj, Visitor *v,
     Error *error = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &error);
-    if (error) {
+    if (!visit_type_int(v, name, &value, &error)) {
         error_propagate(errp, error);
         return;
     }
diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index 38b0c9f09b..383a54578f 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -92,8 +92,7 @@ static void set_drive_helper(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -238,8 +237,7 @@ static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -316,8 +314,7 @@ static void set_netdev(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -398,8 +395,7 @@ static void set_audiodev(Object *obj, Visitor *v, const char* name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index ca7771f307..3cb6faa12b 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -125,8 +125,7 @@ static void prop_set_bit(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_bool(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -189,8 +188,7 @@ static void prop_set_bit64(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_bool(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -486,8 +484,7 @@ static void set_string(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -540,8 +537,7 @@ static void set_mac(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -762,8 +758,7 @@ static void set_pci_devfn(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_free(local_err);
         local_err = NULL;
         visit_type_int32(v, name, &value, &local_err);
@@ -844,8 +839,7 @@ static void set_size32(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }
 
-    visit_type_size(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -894,8 +888,7 @@ static void set_blocksize(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_size(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -976,8 +969,7 @@ static void set_pci_host_devaddr(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -1076,8 +1068,7 @@ static void set_uuid(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -1158,8 +1149,7 @@ static void set_prop_arraylen(Object *obj, Visitor *v, const char *name,
                    name);
         return;
     }
-    visit_type_uint32(v, name, alenptr, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, alenptr, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -1490,8 +1480,8 @@ static void set_prop_pcielinkspeed(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_enum(v, prop->name, &speed, prop->info->enum_table, &local_err);
-    if (local_err) {
+    if (!visit_type_enum(v, prop->name, &speed, prop->info->enum_table,
+                         &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -1578,8 +1568,8 @@ static void set_prop_pcielinkwidth(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_enum(v, prop->name, &width, prop->info->enum_table, &local_err);
-    if (local_err) {
+    if (!visit_type_enum(v, prop->name, &width, prop->info->enum_table,
+                         &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/cpu/core.c b/hw/cpu/core.c
index a92ac597ca..d9857031ca 100644
--- a/hw/cpu/core.c
+++ b/hw/cpu/core.c
@@ -31,8 +31,7 @@ static void core_prop_set_core_id(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -61,8 +60,7 @@ static void core_prop_set_nr_threads(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/gpio/aspeed_gpio.c b/hw/gpio/aspeed_gpio.c
index dfa9db3d33..3310fe62fe 100644
--- a/hw/gpio/aspeed_gpio.c
+++ b/hw/gpio/aspeed_gpio.c
@@ -762,8 +762,7 @@ static void aspeed_gpio_set_pin(Object *obj, Visitor *v, const char *name,
     AspeedGPIOState *s = ASPEED_GPIO(obj);
     int set_idx, group_idx = 0;
 
-    visit_type_bool(v, name, &level, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &level, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index d7f27bc16b..cb15261420 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1862,8 +1862,7 @@ static void pc_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
     Error *error = NULL;
     uint64_t value;
 
-    visit_type_size(v, name, &value, &error);
-    if (error) {
+    if (!visit_type_size(v, name, &value, &error)) {
         error_propagate(errp, error);
         return;
     }
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index f68fbee93d..358f10a92e 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -245,8 +245,7 @@ static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    visit_type_int32(v, name, &boot_index, &local_err);
-    if (local_err) {
+    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
         goto out;
     }
     /* check whether bootindex is present in fw_boot_order list  */
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index 7da2862b3d..76c3f78e11 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -428,8 +428,7 @@ static void apic_common_set_id(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c
index 76f66e0b19..ec92ffd415 100644
--- a/hw/mem/nvdimm.c
+++ b/hw/mem/nvdimm.c
@@ -53,8 +53,7 @@ static void nvdimm_set_label_size(Object *obj, Visitor *v, const char *name,
         goto out;
     }
 
-    visit_type_size(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &value, &local_err)) {
         goto out;
     }
     if (value < MIN_NAMESPACE_LABEL_SIZE) {
@@ -89,8 +88,7 @@ static void nvdimm_set_uuid(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     char *value;
 
-    visit_type_str(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &value, &local_err)) {
         goto out;
     }
 
diff --git a/hw/misc/aspeed_sdmc.c b/hw/misc/aspeed_sdmc.c
index 25e1e58356..28874445c3 100644
--- a/hw/misc/aspeed_sdmc.c
+++ b/hw/misc/aspeed_sdmc.c
@@ -227,8 +227,7 @@ static void aspeed_sdmc_set_ram_size(Object *obj, Visitor *v, const char *name,
     AspeedSDMCState *s = ASPEED_SDMC(obj);
     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c
index 68b574d084..d2b99fc706 100644
--- a/hw/misc/pca9552.c
+++ b/hw/misc/pca9552.c
@@ -296,8 +296,7 @@ static void pca955x_set_led(Object *obj, Visitor *v, const char *name,
     uint8_t state;
     char *state_str;
 
-    visit_type_str(v, name, &state_str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &state_str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/misc/tmp105.c b/hw/misc/tmp105.c
index 58dbebca90..2ae0b899be 100644
--- a/hw/misc/tmp105.c
+++ b/hw/misc/tmp105.c
@@ -75,8 +75,7 @@ static void tmp105_set_temperature(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     int64_t temp;
 
-    visit_type_int(v, name, &temp, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &temp, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/misc/tmp421.c b/hw/misc/tmp421.c
index 74864cd93d..9473382bd5 100644
--- a/hw/misc/tmp421.c
+++ b/hw/misc/tmp421.c
@@ -147,8 +147,7 @@ static void tmp421_set_temperature(Object *obj, Visitor *v, const char *name,
     int offset = ext_range * 64 * 256;
     int tempid;
 
-    visit_type_int(v, name, &temp, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &temp, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/net/ne2000-isa.c b/hw/net/ne2000-isa.c
index fdf8faa0d9..765bcd1f0b 100644
--- a/hw/net/ne2000-isa.c
+++ b/hw/net/ne2000-isa.c
@@ -113,8 +113,7 @@ static void isa_ne2000_set_bootindex(Object *obj, Visitor *v,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    visit_type_int32(v, name, &boot_index, &local_err);
-    if (local_err) {
+    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
         goto out;
     }
     /* check whether bootindex is present in fw_boot_order list  */
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index 0c2bc8e06e..52be86e49c 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -88,8 +88,7 @@ static void spapr_cap_set_bool(Object *obj, Visitor *v, const char *name,
     bool value;
     Error *local_err = NULL;
 
-    visit_type_bool(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -127,8 +126,7 @@ static void spapr_cap_set_string(Object *obj, Visitor *v, const char *name,
     uint8_t i;
     char *val;
 
-    visit_type_str(v, name, &val, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &val, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -171,8 +169,7 @@ static void spapr_cap_set_pagesize(Object *obj, Visitor *v, const char *name,
     uint8_t val;
     Error *local_err = NULL;
 
-    visit_type_size(v, name, &pagesize, &local_err);
-    if (local_err) {
+    if (!visit_type_size(v, name, &pagesize, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 951bcdf2c0..d10193f39e 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -327,8 +327,7 @@ static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
         case FDT_BEGIN_NODE:
             fdt_depth++;
             name = fdt_get_name(fdt, fdt_offset, &name_len);
-            visit_start_struct(v, name, NULL, 0, &err);
-            if (err) {
+            if (!visit_start_struct(v, name, NULL, 0, &err)) {
                 error_propagate(errp, err);
                 return;
             }
@@ -348,14 +347,13 @@ static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
             int i;
             prop = fdt_get_property_by_offset(fdt, fdt_offset, &prop_len);
             name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
-            visit_start_list(v, name, NULL, 0, &err);
-            if (err) {
+            if (!visit_start_list(v, name, NULL, 0, &err)) {
                 error_propagate(errp, err);
                 return;
             }
             for (i = 0; i < prop_len; i++) {
-                visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i], &err);
-                if (err) {
+                if (!visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i],
+                                      &err)) {
                     error_propagate(errp, err);
                     return;
                 }
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index d1e365e3e6..ab28b2fb30 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -2387,8 +2387,7 @@ static void set_css_devid(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &str, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/usb/dev-storage.c b/hw/usb/dev-storage.c
index f5977eb72e..1c3bd2578c 100644
--- a/hw/usb/dev-storage.c
+++ b/hw/usb/dev-storage.c
@@ -736,8 +736,7 @@ static void usb_msd_set_bootindex(Object *obj, Visitor *v, const char *name,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    visit_type_int32(v, name, &boot_index, &local_err);
-    if (local_err) {
+    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
         goto out;
     }
     /* check whether bootindex is present in fw_boot_order list  */
diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index d304c81148..1467b8034e 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -1509,8 +1509,7 @@ static void set_nv_gpudirect_clique_id(Object *obj, Visitor *v,
         return;
     }
 
-    visit_type_uint8(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint8(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index ae31f0817a..277747f4f1 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;
         }
     }
@@ -287,8 +283,7 @@ static void balloon_stats_set_poll_interval(Object *obj, Visitor *v,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/iothread.c b/iothread.c
index cb082b9b26..cb65ef0e56 100644
--- a/iothread.c
+++ b/iothread.c
@@ -243,8 +243,7 @@ static void iothread_set_poll_param(Object *obj, Visitor *v,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int64(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int64(v, name, &value, &local_err)) {
         goto out;
     }
 
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index bb17b1b96c..ae4b6a4246 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -1355,8 +1355,7 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
         break;
     case MIGRATION_PARAMETER_XBZRLE_CACHE_SIZE:
         p->has_xbzrle_cache_size = true;
-        visit_type_size(v, param, &cache_size, &err);
-        if (err) {
+        if (!visit_type_size(v, param, &cache_size, &err)) {
             break;
         }
         if (cache_size > INT64_MAX || (size_t)cache_size != cache_size) {
diff --git a/net/colo-compare.c b/net/colo-compare.c
index f15779dedc..6835d42363 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -1096,8 +1096,7 @@ static void compare_set_timeout(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
@@ -1129,8 +1128,7 @@ static void compare_set_expired_scan_cycle(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
diff --git a/net/dump.c b/net/dump.c
index 61389e7dad..8c487a5590 100644
--- a/net/dump.c
+++ b/net/dump.c
@@ -195,8 +195,7 @@ static void filter_dump_set_maxlen(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (value == 0) {
diff --git a/net/filter-buffer.c b/net/filter-buffer.c
index 93050f86cf..8e42934b37 100644
--- a/net/filter-buffer.c
+++ b/net/filter-buffer.c
@@ -173,8 +173,7 @@ static void filter_buffer_set_interval(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
diff --git a/qom/object.c b/qom/object.c
index 34daaf1280..0213e87c86 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -2094,8 +2094,7 @@ static void property_set_str(Object *obj, Visitor *v, const char *name,
     char *value;
     Error *local_err = NULL;
 
-    visit_type_str(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2175,8 +2174,7 @@ static void property_set_bool(Object *obj, Visitor *v, const char *name,
     bool value;
     Error *local_err = NULL;
 
-    visit_type_bool(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2248,8 +2246,7 @@ static void property_set_enum(Object *obj, Visitor *v, const char *name,
     int value;
     Error *err = NULL;
 
-    visit_type_enum(v, name, &value, prop->lookup, &err);
-    if (err) {
+    if (!visit_type_enum(v, name, &value, prop->lookup, &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -2319,32 +2316,25 @@ static void property_get_tm(Object *obj, Visitor *v, const char *name,
         goto out;
     }
 
-    visit_start_struct(v, name, NULL, 0, &err);
-    if (err) {
+    if (!visit_start_struct(v, name, NULL, 0, &err)) {
         goto out;
     }
-    visit_type_int32(v, "tm_year", &value.tm_year, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_year", &value.tm_year, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_mon", &value.tm_mon, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_mday", &value.tm_mday, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_hour", &value.tm_hour, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_min", &value.tm_min, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_min", &value.tm_min, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_sec", &value.tm_sec, &err)) {
         goto out_end;
     }
     visit_check_struct(v, &err);
@@ -2408,8 +2398,7 @@ static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
     uint8_t value;
     Error *local_err = NULL;
 
-    visit_type_uint8(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint8(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2431,8 +2420,7 @@ static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
     uint16_t value;
     Error *local_err = NULL;
 
-    visit_type_uint16(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint16(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2454,8 +2442,7 @@ static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
     uint32_t value;
     Error *local_err = NULL;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2477,8 +2464,7 @@ static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
     uint64_t value;
     Error *local_err = NULL;
 
-    visit_type_uint64(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint64(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index 7e26f86fa6..3085ae0b31 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -63,8 +63,7 @@ Object *user_creatable_add_type(const char *type, const char *id,
 
     assert(qdict);
     obj = object_new(type);
-    visit_start_struct(v, NULL, NULL, 0, &local_err);
-    if (local_err) {
+    if (!visit_start_struct(v, NULL, NULL, 0, &local_err)) {
         goto out;
     }
     for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index a2f4733eed..343c227c09 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -467,8 +467,7 @@ static void cpu_max_set_sve_max_vq(Object *obj, Visitor *v, const char *name,
     Error *err = NULL;
     uint32_t max_vq;
 
-    visit_type_uint32(v, name, &max_vq, &err);
-    if (err) {
+    if (!visit_type_uint32(v, name, &max_vq, &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -513,8 +512,7 @@ static void cpu_arm_set_sve_vq(Object *obj, Visitor *v, const char *name,
     Error *err = NULL;
     bool value;
 
-    visit_type_bool(v, name, &value, &err);
-    if (err) {
+    if (!visit_type_bool(v, name, &value, &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -550,8 +548,7 @@ static void cpu_arm_set_sve(Object *obj, Visitor *v, const char *name,
     bool value;
     uint64_t t;
 
-    visit_type_bool(v, name, &value, &err);
-    if (err) {
+    if (!visit_type_bool(v, name, &value, &err)) {
         error_propagate(errp, err);
         return;
     }
diff --git a/target/arm/monitor.c b/target/arm/monitor.c
index ea6598c412..98fe11ae69 100644
--- a/target/arm/monitor.c
+++ b/target/arm/monitor.c
@@ -174,8 +174,7 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
         Error *err = NULL;
 
         visitor = qobject_input_visitor_new(model->props);
-        visit_start_struct(visitor, NULL, NULL, 0, &err);
-        if (err) {
+        if (!visit_start_struct(visitor, NULL, NULL, 0, &err)) {
             visit_free(visitor);
             object_unref(obj);
             error_propagate(errp, err);
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 36cbd3d027..c69d057df3 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -4420,8 +4420,7 @@ static void x86_cpuid_version_set_family(Object *obj, Visitor *v,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -4463,8 +4462,7 @@ static void x86_cpuid_version_set_model(Object *obj, Visitor *v,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -4501,8 +4499,7 @@ static void x86_cpuid_version_set_stepping(Object *obj, Visitor *v,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -4606,8 +4603,7 @@ static void x86_cpuid_set_tsc_freq(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_int(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -6816,8 +6812,7 @@ static void x86_cpu_set_bit_prop(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_bool(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/target/ppc/compat.c b/target/ppc/compat.c
index fda0dfe8f8..42f87a4bfe 100644
--- a/target/ppc/compat.c
+++ b/target/ppc/compat.c
@@ -264,8 +264,7 @@ static void ppc_compat_prop_set(Object *obj, Visitor *v, const char *name,
     char *value;
     uint32_t compat_pvr;
 
-    visit_type_str(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index 2fa609bffe..65c26c4c86 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -510,8 +510,7 @@ static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info,
 
     if (qdict) {
         visitor = qobject_input_visitor_new(info->props);
-        visit_start_struct(visitor, NULL, NULL, 0, &err);
-        if (err) {
+        if (!visit_start_struct(visitor, NULL, NULL, 0, &err)) {
             error_propagate(errp, err);
             visit_free(visitor);
             object_unref(obj);
@@ -1017,8 +1016,7 @@ static void set_feature(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_bool(v, name, &value, &err);
-    if (err) {
+    if (!visit_type_bool(v, name, &value, &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -1076,8 +1074,7 @@ static void set_feature_group(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    visit_type_bool(v, name, &value, &err);
-    if (err) {
+    if (!visit_type_bool(v, name, &value, &err)) {
         error_propagate(errp, err);
         return;
     }
diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
index 3f05aba9d6..4a9257005d 100644
--- a/target/sparc/cpu.c
+++ b/target/sparc/cpu.c
@@ -804,8 +804,7 @@ static void sparc_set_nwindows(Object *obj, Visitor *v, const char *name,
     Error *err = NULL;
     int64_t value;
 
-    visit_type_int(v, name, &value, &err);
-    if (err) {
+    if (!visit_type_int(v, name, &value, &err)) {
         error_propagate(errp, err);
         return;
     }