From 62547b8a1c04daf30f50e3db362ade53e22bf222 Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Mon, 2 Nov 2015 18:28:20 -0500
Subject: qemu-img: add check for zero-length job len

The mirror job doesn't update its total length until
it has already started running, so we should translate
a zero-length job-len as meaning 0%.

Otherwise, we may get divide-by-zero faults.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 qemu-img.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'qemu-img.c')

diff --git a/qemu-img.c b/qemu-img.c
index 3025776e14..9831db75ef 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -656,7 +656,8 @@ static void run_block_job(BlockJob *job, Error **errp)
 
     do {
         aio_poll(aio_context, true);
-        qemu_progress_print((float)job->offset / job->len * 100.f, 0);
+        qemu_progress_print(job->len ?
+                            ((float)job->offset / job->len * 100.f) : 0.0f, 0);
     } while (!job->ready);
 
     block_job_complete_sync(job, errp);
-- 
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