[Qemu-devel] [PATCH 1/6] block: directly invoke .bdrv_aio_*() in bdrv_co_io_em()

[Stefan Hajnoczi]

We will unify block layer request processing across sync, aio, and
coroutines and this means a .bdrv_co_*() emulation function should not
call back into the public interface.  There's no need here, just call
.bdrv_aio_*() directly.

The gory details: bdrv_co_io_em() cannot call back into the public
bdrv_aio_*() interface since that will be handled using coroutines,
which causes us to call into bdrv_co_io_em() again in an infinite loop
:).

Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 block.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/block.c b/block.c
index e3fe97f..dc36b2b 100644
--- a/block.c
+++ b/block.c
@@ -2990,11 +2990,11 @@ static int coroutine_fn bdrv_co_io_em(BlockDriverState 
*bs, int64_t sector_num,
     BlockDriverAIOCB *acb;
 
     if (is_write) {
-        acb = bdrv_aio_writev(bs, sector_num, iov, nb_sectors,
-                              bdrv_co_io_em_complete, &co);
+        acb = bs->drv->bdrv_aio_writev(bs, sector_num, iov, nb_sectors,
+                                       bdrv_co_io_em_complete, &co);
     } else {
-        acb = bdrv_aio_readv(bs, sector_num, iov, nb_sectors,
-                             bdrv_co_io_em_complete, &co);
+        acb = bs->drv->bdrv_aio_readv(bs, sector_num, iov, nb_sectors,
+                                      bdrv_co_io_em_complete, &co);
     }
 
     trace_bdrv_co_io(is_write, acb);
-- 
1.7.6.3