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-rw-r--r--hw/block/xen_disk.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 098f6c62c7..7f0f14ae52 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -483,7 +483,18 @@ static void qemu_aio_complete(void *opaque, int ret)
ioreq->status = ioreq->aio_errors ? BLKIF_RSP_ERROR : BLKIF_RSP_OKAY;
ioreq_unmap(ioreq);
ioreq_finish(ioreq);
- bdrv_acct_done(ioreq->blkdev->bs, &ioreq->acct);
+ switch (ioreq->req.operation) {
+ case BLKIF_OP_WRITE:
+ case BLKIF_OP_FLUSH_DISKCACHE:
+ if (!ioreq->req.nr_segments) {
+ break;
+ }
+ case BLKIF_OP_READ:
+ bdrv_acct_done(ioreq->blkdev->bs, &ioreq->acct);
+ break;
+ default:
+ break;
+ }
qemu_bh_schedule(ioreq->blkdev->bh);
}