[PATCH 24/46] qapi: Smooth error checking manually

[Markus Armbruster <armbru@redhat.com>]

When foo(..., &err) is followed by error_propagate(errp, err), we can
often just as well do foo(..., errp).  The previous commit did that
for simple cases with Coccinelle.  Do it for a few more manually.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 accel/kvm/kvm-all.c       | 50 ++++++++++++++++++---------------------
 block/throttle-groups.c   |  5 ++--
 bootdevice.c              |  4 ++--
 hw/core/qdev-properties.c | 12 +++++-----
 hw/ide/qdev.c             |  4 ++--
 hw/mem/nvdimm.c           |  9 +++----
 hw/net/ne2000-isa.c       |  4 ++--
 hw/usb/dev-storage.c      |  4 ++--
 net/net.c                 |  8 ++-----
 qom/object.c              | 30 +++++++++++------------
 10 files changed, 59 insertions(+), 71 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index be02b8e07a..0b921cd24c 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -3119,37 +3119,33 @@ static void kvm_set_kernel_irqchip(Object *obj, Visitor *v,
                                    const char *name, void *opaque,
                                    Error **errp)
 {
-    Error *err = NULL;
     KVMState *s = KVM_STATE(obj);
     OnOffSplit mode;
 
-    visit_type_OnOffSplit(v, name, &mode, &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!visit_type_OnOffSplit(v, name, &mode, errp)) {
         return;
-    } else {
-        switch (mode) {
-        case ON_OFF_SPLIT_ON:
-            s->kernel_irqchip_allowed = true;
-            s->kernel_irqchip_required = true;
-            s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
-            break;
-        case ON_OFF_SPLIT_OFF:
-            s->kernel_irqchip_allowed = false;
-            s->kernel_irqchip_required = false;
-            s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
-            break;
-        case ON_OFF_SPLIT_SPLIT:
-            s->kernel_irqchip_allowed = true;
-            s->kernel_irqchip_required = true;
-            s->kernel_irqchip_split = ON_OFF_AUTO_ON;
-            break;
-        default:
-            /* The value was checked in visit_type_OnOffSplit() above. If
-             * we get here, then something is wrong in QEMU.
-             */
-            abort();
-        }
+    }
+    switch (mode) {
+    case ON_OFF_SPLIT_ON:
+        s->kernel_irqchip_allowed = true;
+        s->kernel_irqchip_required = true;
+        s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
+        break;
+    case ON_OFF_SPLIT_OFF:
+        s->kernel_irqchip_allowed = false;
+        s->kernel_irqchip_required = false;
+        s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
+        break;
+    case ON_OFF_SPLIT_SPLIT:
+        s->kernel_irqchip_allowed = true;
+        s->kernel_irqchip_required = true;
+        s->kernel_irqchip_split = ON_OFF_AUTO_ON;
+        break;
+    default:
+        /* The value was checked in visit_type_OnOffSplit() above. If
+         * we get here, then something is wrong in QEMU.
+         */
+        abort();
     }
 }
 
diff --git a/block/throttle-groups.c b/block/throttle-groups.c
index dba2bb6451..03a53c89ea 100644
--- a/block/throttle-groups.c
+++ b/block/throttle-groups.c
@@ -889,8 +889,8 @@ static void throttle_group_set_limits(Object *obj, Visitor *v,
     ThrottleLimits *argp;
     Error *local_err = NULL;
 
-    if (!visit_type_ThrottleLimits(v, name, &argp, &local_err)) {
-        goto ret;
+    if (!visit_type_ThrottleLimits(v, name, &argp, errp)) {
+        return;
     }
     qemu_mutex_lock(&tg->lock);
     throttle_get_config(&tg->ts, &cfg);
@@ -902,7 +902,6 @@ static void throttle_group_set_limits(Object *obj, Visitor *v,
 
 unlock:
     qemu_mutex_unlock(&tg->lock);
-ret:
     qapi_free_ThrottleLimits(argp);
     error_propagate(errp, local_err);
     return;
diff --git a/bootdevice.c b/bootdevice.c
index fb09d3c668..769f40c77d 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -297,8 +297,8 @@ static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
-        goto out;
+    if (!visit_type_int32(v, name, &boot_index, errp)) {
+        return;
     }
     /* check whether bootindex is present in fw_boot_order list  */
     check_boot_index(boot_index, &local_err);
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index fa88a8885c..11e7d27ccc 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -664,15 +664,15 @@ static void set_pci_devfn(Object *obj, Visitor *v, const char *name,
     if (!visit_type_str(v, name, &str, &local_err)) {
         error_free(local_err);
         local_err = NULL;
-        visit_type_int32(v, name, &value, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
-        } else if (value < -1 || value > 255) {
+        if (!visit_type_int32(v, name, &value, errp)) {
+            return;
+        }
+        if (value < -1 || value > 255) {
             error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                        name ? name : "null", "pci_devfn");
-        } else {
-            *ptr = value;
+            return;
         }
+        *ptr = value;
         return;
     }
 
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index 358f10a92e..ba8b0d7f02 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -245,8 +245,8 @@ static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
-        goto out;
+    if (!visit_type_int32(v, name, &boot_index, errp)) {
+        return;
     }
     /* check whether bootindex is present in fw_boot_order list  */
     check_boot_index(boot_index, &local_err);
diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c
index e6fdf6ccc3..d0d6e553cf 100644
--- a/hw/mem/nvdimm.c
+++ b/hw/mem/nvdimm.c
@@ -82,21 +82,18 @@ static void nvdimm_set_uuid(Object *obj, Visitor *v, const char *name,
                                   void *opaque, Error **errp)
 {
     NVDIMMDevice *nvdimm = NVDIMM(obj);
-    Error *local_err = NULL;
     char *value;
 
-    if (!visit_type_str(v, name, &value, &local_err)) {
-        goto out;
+    if (!visit_type_str(v, name, &value, errp)) {
+        return;
     }
 
     if (qemu_uuid_parse(value, &nvdimm->uuid) != 0) {
         error_setg(errp, "Property '%s.%s' has invalid value",
                    object_get_typename(obj), name);
     }
-    g_free(value);
 
-out:
-    error_propagate(errp, local_err);
+    g_free(value);
 }
 
 
diff --git a/hw/net/ne2000-isa.c b/hw/net/ne2000-isa.c
index 765bcd1f0b..0594abd93a 100644
--- a/hw/net/ne2000-isa.c
+++ b/hw/net/ne2000-isa.c
@@ -113,8 +113,8 @@ static void isa_ne2000_set_bootindex(Object *obj, Visitor *v,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
-        goto out;
+    if (!visit_type_int32(v, name, &boot_index, errp)) {
+        return;
     }
     /* check whether bootindex is present in fw_boot_order list  */
     check_boot_index(boot_index, &local_err);
diff --git a/hw/usb/dev-storage.c b/hw/usb/dev-storage.c
index 1c3bd2578c..721665191e 100644
--- a/hw/usb/dev-storage.c
+++ b/hw/usb/dev-storage.c
@@ -736,8 +736,8 @@ static void usb_msd_set_bootindex(Object *obj, Visitor *v, const char *name,
     int32_t boot_index;
     Error *local_err = NULL;
 
-    if (!visit_type_int32(v, name, &boot_index, &local_err)) {
-        goto out;
+    if (!visit_type_int32(v, name, &boot_index, errp)) {
+        return;
     }
     /* check whether bootindex is present in fw_boot_order list  */
     check_boot_index(boot_index, &local_err);
diff --git a/net/net.c b/net/net.c
index d1130296e1..e1f45d3b36 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1052,7 +1052,6 @@ static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
 {
     gchar **substrings = NULL;
     Netdev *object = NULL;
-    Error *err = NULL;
     int ret = -1;
     Visitor *v = opts_visitor_new(opts);
 
@@ -1100,16 +1099,13 @@ static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
         qemu_opts_set_id(opts, g_strdup_printf("__org.qemu.net%i", idx++));
     }
 
-    visit_type_Netdev(v, NULL, &object, &err);
-
-    if (!err) {
-        ret = net_client_init1(object, is_netdev, &err);
+    if (visit_type_Netdev(v, NULL, &object, errp)) {
+        ret = net_client_init1(object, is_netdev, errp);
     }
 
     qapi_free_Netdev(object);
 
 out:
-    error_propagate(errp, err);
     g_strfreev(substrings);
     visit_free(v);
     return ret;
diff --git a/qom/object.c b/qom/object.c
index 780a700542..b8aac074c2 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1766,9 +1766,11 @@ static void object_set_link_property(Object *obj, Visitor *v,
     Object *new_target = NULL;
     char *path = NULL;
 
-    visit_type_str(v, name, &path, &local_err);
+    if (!visit_type_str(v, name, &path, errp)) {
+        return;
+    }
 
-    if (!local_err && strcmp(path, "") != 0) {
+    if (strcmp(path, "") != 0) {
         new_target = object_resolve_link(obj, name, path, &local_err);
     }
 
@@ -2293,36 +2295,34 @@ static void property_get_tm(Object *obj, Visitor *v, const char *name,
 
     prop->get(obj, &value, &err);
     if (err) {
-        goto out;
+        error_propagate(errp, err);
+        return;
     }
 
-    if (!visit_start_struct(v, name, NULL, 0, &err)) {
-        goto out;
+    if (!visit_start_struct(v, name, NULL, 0, errp)) {
+        return;
     }
-    if (!visit_type_int32(v, "tm_year", &value.tm_year, &err)) {
+    if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) {
         goto out_end;
     }
-    if (!visit_type_int32(v, "tm_mon", &value.tm_mon, &err)) {
+    if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) {
         goto out_end;
     }
-    if (!visit_type_int32(v, "tm_mday", &value.tm_mday, &err)) {
+    if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) {
         goto out_end;
     }
-    if (!visit_type_int32(v, "tm_hour", &value.tm_hour, &err)) {
+    if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) {
         goto out_end;
     }
-    if (!visit_type_int32(v, "tm_min", &value.tm_min, &err)) {
+    if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) {
         goto out_end;
     }
-    if (!visit_type_int32(v, "tm_sec", &value.tm_sec, &err)) {
+    if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) {
         goto out_end;
     }
-    visit_check_struct(v, &err);
+    visit_check_struct(v, errp);
 out_end:
     visit_end_struct(v, NULL);
-out:
-    error_propagate(errp, err);
-
 }
 
 static void property_release_tm(Object *obj, const char *name,
-- 
2.26.2