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Use error_is_set() only when necessary

Browse source 
error_is_set(&var) is the same as var != NULL, but it takes
whole-program analysis to figure that out.  Unnecessarily hard for
optimizers, static checkers, and human readers.  Dumb it down to
obvious.

Gets rid of several dozen Coverity false positives.

Note that the obvious form is already used in many places.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Markus Armbruster 2014-01-30 15:07:28 +01:00 • committed by Luiz Capitulino
parent ff9ec34de8
commit 84d18f065f
37 changed files with 156 additions and 156 deletions
Download patch file Download diff file Expand all files Collapse all files

42
blockdev.c
View file

@ -331,13 +331,13 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
* stay in bs_opts for processing by bdrv_open(). */
id = qdict_get_try_str(bs_opts, "id");
opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
return NULL;
}
qemu_opts_absorb_qdict(opts, bs_opts, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
goto early_err;
}
@ -443,7 +443,7 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
}
on_write_error = parse_block_error_action(buf, 0, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
goto early_err;
}
@ -457,7 +457,7 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
}
on_read_error = parse_block_error_action(buf, 1, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
goto early_err;
}
@ -688,7 +688,7 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
&error_abort);
qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
goto fail;
@ -875,13 +875,13 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
/* Actual block device init: Functionality shared with blockdev-add */
dinfo = blockdev_init(filename, bs_opts, type, &local_err);
if (dinfo == NULL) {
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
}
goto fail;
} else {
assert(!error_is_set(&local_err));
assert(!local_err);
}
/* Set legacy DriveInfo fields */
@ -1017,7 +1017,7 @@ SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
}
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return NULL;
}
@ -1030,7 +1030,7 @@ SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
}
bdrv_snapshot_delete(bs, id, name, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return NULL;
}
@ -1244,7 +1244,7 @@ static void external_snapshot_prepare(BlkTransactionState *common,
state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -1289,7 +1289,7 @@ static void external_snapshot_prepare(BlkTransactionState *common,
state->old_bs->filename,
state->old_bs->drv->format_name,
NULL, -1, flags, &local_err, false);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -1360,7 +1360,7 @@ static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
backup->has_on_source_error, backup->on_source_error,
backup->has_on_target_error, backup->on_target_error,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
state->bs = NULL;
state->job = NULL;
@ -1452,7 +1452,7 @@ void qmp_transaction(TransactionActionList *dev_list, Error **errp)
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
state->ops->prepare(state, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto delete_and_fail;
}
@ -1533,7 +1533,7 @@ void qmp_block_passwd(bool has_device, const char *device,
bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -1598,7 +1598,7 @@ void qmp_change_blockdev(const char *device, const char *filename,
}
eject_device(bs, 0, &err);
if (error_is_set(&err)) {
if (err) {
error_propagate(errp, err);
return;
}
@ -1735,7 +1735,7 @@ void qmp_block_resize(bool has_device, const char *device,
bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -1828,7 +1828,7 @@ void qmp_block_stream(const char *device, bool has_base,
stream_start(bs, base_bs, base, has_speed ? speed : 0,
on_error, block_job_cb, bs, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -1986,7 +1986,7 @@ void qmp_drive_backup(const char *device, const char *target,
}
}
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -2127,7 +2127,7 @@ void qmp_drive_mirror(const char *device, const char *target,
}
}
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@ -2266,7 +2266,7 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
&options, NULL, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto fail;
}
@ -2277,7 +2277,7 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
qdict_flatten(qdict);
blockdev_init(NULL, qdict, IF_NONE, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto fail;
}