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-rw-r--r--block.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block.c b/block.c
index e9869863d1..b006e586c7 100644
--- a/block.c
+++ b/block.c
@@ -788,6 +788,7 @@ void bdrv_detach_dev(BlockDriverState *bs, void *dev)
     bs->dev = NULL;
     bs->dev_ops = NULL;
     bs->dev_opaque = NULL;
+    bs->buffer_alignment = 512;
 }
 
 /* TODO change to return DeviceState * when all users are qdevified */