commit b666d239509a0855740444c254a65cbf567bfb90
author Kevin Wolf <kwolf@redhat.com> Wed May 05 11:44:39 2010 +0200
committer Kevin Wolf <kwolf@redhat.com> Mon May 17 10:20:05 2010 +0200
tree e8d2539f1ad8d0c9578974bfe74fb5ad3b5008e4
parent 7a6f391376c61af1dce2d624a4fcff8eec4fa097

block: Avoid unchecked casts for AIOCBs

Use container_of for one direction and &acb->common for the other one.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block/qcow2.c

diff --git a/block/qcow2.c b/block/qcow2.c
index ebad4e1..0ce7150 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -338,7 +338,7 @@
 
 static void qcow_aio_cancel(BlockDriverAIOCB *blockacb)
 {
-    QCowAIOCB *acb = (QCowAIOCB *)blockacb;
+    QCowAIOCB *acb = container_of(blockacb, QCowAIOCB, common);
     if (acb->hd_aiocb)
         bdrv_aio_cancel(acb->hd_aiocb);
     qemu_aio_release(acb);