[PATCH 2/6] qdev: make release_drive() idempotent

[marcandre . lureau]

From: Marc-André Lureau <marcandre.lur...@redhat.com>

So it can eventually be called multiple times safely.

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
 hw/core/qdev-properties-system.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index 8e11e6388b..b10835185c 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -231,6 +231,7 @@ static void release_drive(Object *obj, const char *name, 
void *opaque)
     if (*ptr) {
         blockdev_auto_del(*ptr);
         blk_detach_dev(*ptr, dev);
+        *ptr = NULL;
     }
 }
 
-- 
2.49.0