block: Simplify BDRV_BLOCK_RAW recursion

Since we are already in coroutine context during the body of
bdrv_co_get_block_status(), we can shave off a few layers of
wrappers when recursing to query the protocol when a format driver
returned BDRV_BLOCK_RAW.

Note that we are already using the correct recursion later on in
the same function, when probing whether the protocol layer is sparse
in order to find out if we can add BDRV_BLOCK_ZERO to an existing
BDRV_BLOCK_DATA|BDRV_BLOCK_OFFSET_VALID.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 20170504173745.27414-1-eblake@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit ee29d6adefcca7e76abb124183814ed3acc74fac)
* prereq for 81c219a
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/block/io.c b/block/io.c
index a7142e0..fe0c867 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1792,8 +1792,8 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
 
     if (ret & BDRV_BLOCK_RAW) {
         assert(ret & BDRV_BLOCK_OFFSET_VALID);
-        ret = bdrv_get_block_status(*file, ret >> BDRV_SECTOR_BITS,
-                                    *pnum, pnum, file);
+        ret = bdrv_co_get_block_status(*file, ret >> BDRV_SECTOR_BITS,
+                                       *pnum, pnum, file);
         goto out;
     }