call bdrv_drain_all() even if the vm is stopped
There are still I/O operations when the vm is stopped. For example,
stop the vm, and do block migration. In this case, we don't drain all
I/O operation, and may meet the following problem:
qemu-system-x86_64: migration/block.c:731: block_save_complete: Assertion `block_mig_state.submitted == 0' failed.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Message-Id: <564EE92E.4070701@cn.fujitsu.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/cpus.c b/cpus.c
index 877bd70..43676fa 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1415,6 +1415,8 @@
return vm_stop(state);
} else {
runstate_set(state);
+
+ bdrv_drain_all();
/* Make sure to return an error if the flush in a previous vm_stop()
* failed. */
return bdrv_flush_all();
