[Qemu-devel] [PATCHv2 14/20] block/get_block_status: set *pnum = 0 on error

[Peter Lieven <pl@kamp.de>]

if the call is invoked through bdrv_is_allocated the caller might
expect *pnum = 0 on error. however, a new implementation of
bdrv_get_block_status might only return a negative exit value on
error while keeping *pnum untouched.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Lieven <pl@kamp.de>
---
 block.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/block.c b/block.c
index 88b137c..805ee26 100644
--- a/block.c
+++ b/block.c
@@ -3188,6 +3188,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
 
     ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
     if (ret < 0) {
+        *pnum = 0;
         return ret;
     }
 
-- 
1.7.9.5