fix: avoid an infinite loop or a dangling pointer problem in img_commit

img_commit could fall into an infinite loop calling run_block_job() if
its blockjob fails on any I/O error, fix this already known problem.

Signed-off-by: sochin.jiang <sochin.jiang@huawei.com>
Message-id: 1497509253-28941-1-git-send-email-sochin.jiang@huawei.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/blockjob.c b/blockjob.c
index a0d7e29..70a7818 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -139,7 +139,7 @@ static void block_job_resume(BlockJob *job)
     block_job_enter(job);
 }
 
-static void block_job_ref(BlockJob *job)
+void block_job_ref(BlockJob *job)
 {
     ++job->refcnt;
 }
@@ -148,7 +148,7 @@ static void block_job_attached_aio_context(AioContext *new_context,
                                            void *opaque);
 static void block_job_detach_aio_context(void *opaque);
 
-static void block_job_unref(BlockJob *job)
+void block_job_unref(BlockJob *job)
 {
     if (--job->refcnt == 0) {
         BlockDriverState *bs = blk_bs(job->blk);