block: Use BdrvChild to discard

[qmiga/qemu.git] / block / block-backend.c

diff --git a/block/block-backend.c b/block/block-backend.c
index e94e3d5..f2f75a9 100644 (file)
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1560,7 +1560,7 @@ int blk_co_pdiscard(BlockBackend *blk, int64_t offset, int bytes)
         return ret;
     }
 
-    return bdrv_co_pdiscard(blk_bs(blk), offset, bytes);
+    return bdrv_co_pdiscard(blk->root, offset, bytes);
 }
 
 int blk_co_flush(BlockBackend *blk)