[PATCH v3 07/13] blockjob: return status from block_job_set_speed()

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Better to return status together with setting errp. It allows to avoid
error propagation in the caller.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Alberto Garcia <berto@igalia.com>
---
 include/block/blockjob.h |  2 +-
 blockjob.c               | 18 ++++++++----------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index 35faa3aa26..d200f33c10 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -139,7 +139,7 @@ bool block_job_has_bdrv(BlockJob *job, BlockDriverState *bs);
  * Set a rate-limiting parameter for the job; the actual meaning may
  * vary depending on the job type.
  */
-void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp);
+bool block_job_set_speed(BlockJob *job, int64_t speed, Error **errp);
 
 /**
  * block_job_query:
diff --git a/blockjob.c b/blockjob.c
index 98ac8af982..bba96a89ba 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -254,28 +254,30 @@ static bool job_timer_pending(Job *job)
     return timer_pending(&job->sleep_timer);
 }
 
-void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
+bool block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
 {
     int64_t old_speed = job->speed;
 
-    if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) {
-        return;
+    if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp) < 0) {
+        return false;
     }
     if (speed < 0) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "speed",
                    "a non-negative value");
-        return;
+        return false;
     }
 
     ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME);
 
     job->speed = speed;
     if (speed && speed <= old_speed) {
-        return;
+        return true;
     }
 
     /* kick only if a timer is pending */
     job_enter_cond(&job->job, job_timer_pending);
+
+    return true;
 }
 
 int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n)
@@ -448,12 +450,8 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
 
     /* Only set speed when necessary to avoid NotSupported error */
     if (speed != 0) {
-        Error *local_err = NULL;
-
-        block_job_set_speed(job, speed, &local_err);
-        if (local_err) {
+        if (!block_job_set_speed(job, speed, errp)) {
             job_early_fail(&job->job);
-            error_propagate(errp, local_err);
             return NULL;
         }
     }
-- 
2.21.3