This patch simplifies code that uses a local_err variable just to
immediately use it for an error_propagate() call.
Coccinelle patch used to perform the changes added to
scripts/coccinelle/remove_local_err.cocci.
Reviewed-by: Eric Blake <ebl...@redhat.com>
Acked-by: Cornelia Huck <cornelia.h...@de.ibm.com>
Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
---
Changes v1 -> v2:
* (new patch)
Changes v2 -> v3:
* Remove unused metavariable from script
* Do changes only if errp is not touched before the error_setg()
call (so we are sure *errp is not set and error_setg() won't
abort)
* Changes dropped from v2 due to script changes:
* block.c:bdrv_create_co_entry()
* block.c:bdrv_create_file()
* blockdev.c:qmp_blockdev_mirror()
---
scripts/coccinelle/remove_local_err.cocci | 29 +++++++++++++++++++++++++++++
block/raw-posix.c | 8 ++------
block/raw_bsd.c | 4 +---
hw/s390x/s390-virtio-ccw.c | 5 +----
hw/s390x/virtio-ccw.c | 28 +++++++---------------------
target-i386/cpu.c | 4 +---
6 files changed, 41 insertions(+), 37 deletions(-)
create mode 100644 scripts/coccinelle/remove_local_err.cocci
diff --git a/scripts/coccinelle/remove_local_err.cocci
b/scripts/coccinelle/remove_local_err.cocci
new file mode 100644
index 0000000..9261c99
--- /dev/null
+++ b/scripts/coccinelle/remove_local_err.cocci
@@ -0,0 +1,29 @@
+// Replace unnecessary usage of local_err variable with
+// direct usage of errp argument
+
+@@
+identifier F;
+expression list ARGS;
+expression F2;
+identifier LOCAL_ERR;
+identifier ERRP;
+idexpression V;
+typedef Error;
+@@
+ F(..., Error **ERRP)
+ {
+ ...
+- Error *LOCAL_ERR;
+ ... when != LOCAL_ERR
+ when != ERRP
+(
+- F2(ARGS, &LOCAL_ERR);
+- error_propagate(ERRP, LOCAL_ERR);
++ F2(ARGS, ERRP);
+|
+- V = F2(ARGS, &LOCAL_ERR);
+- error_propagate(ERRP, LOCAL_ERR);
++ V = F2(ARGS, ERRP);
+)
+ ... when != LOCAL_ERR
+ }
diff --git a/block/raw-posix.c b/block/raw-posix.c
index cb663d8..d7397bf 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -582,12 +582,10 @@ static int raw_open(BlockDriverState *bs, QDict *options,
int flags,
Error **errp)
{
BDRVRawState *s = bs->opaque;
- Error *local_err = NULL;
int ret;
s->type = FTYPE_FILE;
- ret = raw_open_common(bs, options, flags, 0, &local_err);
- error_propagate(errp, local_err);
+ ret = raw_open_common(bs, options, flags, 0, errp);
return ret;
}
@@ -2442,14 +2440,12 @@ static int cdrom_open(BlockDriverState *bs, QDict
*options, int flags,
Error **errp)
{
BDRVRawState *s = bs->opaque;
- Error *local_err = NULL;
int ret;
s->type = FTYPE_CD;
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
- ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err);
- error_propagate(errp, local_err);
+ ret = raw_open_common(bs, options, flags, O_NONBLOCK, errp);
return ret;
}
diff --git a/block/raw_bsd.c b/block/raw_bsd.c
index 5af11b6..b51ac98 100644
--- a/block/raw_bsd.c
+++ b/block/raw_bsd.c
@@ -190,11 +190,9 @@ static int raw_has_zero_init(BlockDriverState *bs)
static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
{
- Error *local_err = NULL;
int ret;
- ret = bdrv_create_file(filename, opts, &local_err);
- error_propagate(errp, local_err);
+ ret = bdrv_create_file(filename, opts, errp);
return ret;
}
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 95ff5e3..b7112d0 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -180,10 +180,7 @@ static HotplugHandler
*s390_get_hotplug_handler(MachineState *machine,
static void s390_hot_add_cpu(const int64_t id, Error **errp)
{
MachineState *machine = MACHINE(qdev_get_machine());
- Error *err = NULL;
-
- s390x_new_cpu(machine->cpu_model, id, &err);
- error_propagate(errp, err);
+ s390x_new_cpu(machine->cpu_model, id, errp);
}
static void ccw_machine_class_init(ObjectClass *oc, void *data)
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 464b091..50b0935 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -899,13 +899,11 @@ static void virtio_ccw_net_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
DeviceState *qdev = DEVICE(ccw_dev);
VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
- Error *err = NULL;
virtio_net_set_netclient_name(&dev->vdev, qdev->id,
object_get_typename(OBJECT(qdev)));
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void virtio_ccw_net_instance_init(Object *obj)
@@ -922,11 +920,9 @@ static void virtio_ccw_blk_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
{
VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
- Error *err = NULL;
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void virtio_ccw_blk_instance_init(Object *obj)
@@ -946,7 +942,6 @@ static void virtio_ccw_serial_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
DeviceState *proxy = DEVICE(ccw_dev);
- Error *err = NULL;
char *bus_name;
/*
@@ -960,8 +955,7 @@ static void virtio_ccw_serial_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
}
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
@@ -977,11 +971,9 @@ static void virtio_ccw_balloon_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
{
VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
- Error *err = NULL;
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void virtio_ccw_balloon_instance_init(Object *obj)
@@ -1002,7 +994,6 @@ static void virtio_ccw_scsi_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
DeviceState *qdev = DEVICE(ccw_dev);
- Error *err = NULL;
char *bus_name;
/*
@@ -1016,8 +1007,7 @@ static void virtio_ccw_scsi_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
}
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void virtio_ccw_scsi_instance_init(Object *obj)
@@ -1035,11 +1025,9 @@ static void vhost_ccw_scsi_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
{
VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
- Error *err = NULL;
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void vhost_ccw_scsi_instance_init(Object *obj)
@@ -1856,11 +1844,9 @@ static void virtio_ccw_9p_realize(VirtioCcwDevice
*ccw_dev, Error **errp)
{
V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
- Error *err = NULL;
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 895a386..2cea40a 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1820,7 +1820,6 @@ static void x86_cpu_get_feature_words(Object *obj,
Visitor *v,
{
uint32_t *array = (uint32_t *)opaque;
FeatureWord w;
- Error *err = NULL;
X86CPUFeatureWordInfo word_infos[FEATURE_WORDS] = { };
X86CPUFeatureWordInfoList list_entries[FEATURE_WORDS] = { };
X86CPUFeatureWordInfoList *list = NULL;
@@ -1840,8 +1839,7 @@ static void x86_cpu_get_feature_words(Object *obj,
Visitor *v,
list = &list_entries[w];
}
- visit_type_X86CPUFeatureWordInfoList(v, "feature-words", &list, &err);
- error_propagate(errp, err);
+ visit_type_X86CPUFeatureWordInfoList(v, "feature-words", &list, errp);
}
static void x86_get_hv_spinlocks(Object *obj, Visitor *v, const char *name,
--
2.5.5
