[Qemu-block] [PATCH 1/2] qapi: Tweak error message of bdrv_query_image_info

[Fam Zheng]

@bs doesn't always have a device name, such as when it comes from
"qemu-img info". Report file name instead.

Signed-off-by: Fam Zheng <address@hidden>
---
 block/qapi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/qapi.c b/block/qapi.c
index a62e862..6329735 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -237,8 +237,8 @@ void bdrv_query_image_info(BlockDriverState *bs,
 
     size = bdrv_getlength(bs);
     if (size < 0) {
-        error_setg_errno(errp, -size, "Can't get size of device '%s'",
-                         bdrv_get_device_name(bs));
+        error_setg_errno(errp, -size, "Can't get image size '%s'",
+                         bs->exact_filename);
         goto out;
     }
 
-- 
2.9.3