[PULL 13/20] spapr: Add a return value to spapr_nvdimm_validate()

[David Gibson <david@gibson.dropbear.id.au>]

From: Greg Kurz <groug@kaod.org>

As recommended in "qapi/error.h", return true on success and false on
failure. This allows to reduce error propagation overhead in the callers.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20200914123505.612812-13-groug@kaod.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr.c                |  4 +---
 hw/ppc/spapr_nvdimm.c         | 14 ++++++++------
 include/hw/ppc/spapr_nvdimm.h |  2 +-
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c6af456cfc..7f3a620d41 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -3478,9 +3478,7 @@ static void spapr_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
     }
 
     if (is_nvdimm) {
-        spapr_nvdimm_validate(hotplug_dev, NVDIMM(dev), size, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
+        if (!spapr_nvdimm_validate(hotplug_dev, NVDIMM(dev), size, errp)) {
             return;
         }
     } else if (size % SPAPR_MEMORY_BLOCK_SIZE) {
diff --git a/hw/ppc/spapr_nvdimm.c b/hw/ppc/spapr_nvdimm.c
index c06f903e5b..b3a489e9fe 100644
--- a/hw/ppc/spapr_nvdimm.c
+++ b/hw/ppc/spapr_nvdimm.c
@@ -33,7 +33,7 @@
 #include "sysemu/sysemu.h"
 #include "hw/ppc/spapr_numa.h"
 
-void spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
+bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
                            uint64_t size, Error **errp)
 {
     const MachineClass *mc = MACHINE_GET_CLASS(hotplug_dev);
@@ -45,7 +45,7 @@ void spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
 
     if (!mc->nvdimm_supported) {
         error_setg(errp, "NVDIMM hotplug not supported for this machine");
-        return;
+        return false;
     }
 
     /*
@@ -59,20 +59,20 @@ void spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
      */
     if (!ms->nvdimms_state->is_enabled && nvdimm_opt) {
         error_setg(errp, "nvdimm device found but 'nvdimm=off' was set");
-        return;
+        return false;
     }
 
     if (object_property_get_int(OBJECT(nvdimm), NVDIMM_LABEL_SIZE_PROP,
                                 &error_abort) == 0) {
         error_setg(errp, "PAPR requires NVDIMM devices to have label-size set");
-        return;
+        return false;
     }
 
     if (size % SPAPR_MINIMUM_SCM_BLOCK_SIZE) {
         error_setg(errp, "PAPR requires NVDIMM memory size (excluding label)"
                    " to be a multiple of %" PRIu64 "MB",
                    SPAPR_MINIMUM_SCM_BLOCK_SIZE / MiB);
-        return;
+        return false;
     }
 
     uuidstr = object_property_get_str(OBJECT(nvdimm), NVDIMM_UUID_PROP,
@@ -82,8 +82,10 @@ void spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
 
     if (qemu_uuid_is_null(&uuid)) {
         error_setg(errp, "NVDIMM device requires the uuid to be set");
-        return;
+        return false;
     }
+
+    return true;
 }
 
 
diff --git a/include/hw/ppc/spapr_nvdimm.h b/include/hw/ppc/spapr_nvdimm.h
index 3eb344e8e9..b834d82f55 100644
--- a/include/hw/ppc/spapr_nvdimm.h
+++ b/include/hw/ppc/spapr_nvdimm.h
@@ -28,7 +28,7 @@ QEMU_BUILD_BUG_ON(SPAPR_MINIMUM_SCM_BLOCK_SIZE % SPAPR_MEMORY_BLOCK_SIZE);
 int spapr_pmem_dt_populate(SpaprDrc *drc, SpaprMachineState *spapr,
                            void *fdt, int *fdt_start_offset, Error **errp);
 void spapr_dt_persistent_memory(SpaprMachineState *spapr, void *fdt);
-void spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
+bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
                            uint64_t size, Error **errp);
 void spapr_add_nvdimm(DeviceState *dev, uint64_t slot, Error **errp);
 void spapr_create_nvdimm_dr_connectors(SpaprMachineState *spapr);
-- 
2.26.2