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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>
This commit is contained in:
Wen Congyang 2015-11-20 17:34:38 +08:00 committed by Paolo Bonzini
parent 2b1641d0a2
commit b2780d3253
1 changed files with 2 additions and 0 deletions
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2
cpus.c
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@ -1415,6 +1415,8 @@ int vm_stop_force_state(RunState state)
return vm_stop(state); return vm_stop(state);
} else { } else {
runstate_set(state); runstate_set(state);
bdrv_drain_all();
/* Make sure to return an error if the flush in a previous vm_stop() /* Make sure to return an error if the flush in a previous vm_stop()
* failed. */ * failed. */
return bdrv_flush_all(); return bdrv_flush_all();