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exec: make address_space_cache_destroy idempotent 

Clear cache->mr so that address_space_cache_destroy does nothing
the second time it is called.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-01-27 16:40:15 +01:00 committed by Michael S. Tsirkin
parent 9796d0ac8f
commit 91047df38d
1 changed files with 1 additions and 0 deletions
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exec.c
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@ -3166,6 +3166,7 @@ void address_space_cache_destroy(MemoryRegionCache *cache)
xen_invalidate_map_cache_entry(cache->ptr); xen_invalidate_map_cache_entry(cache->ptr);
} }
memory_region_unref(cache->mr); memory_region_unref(cache->mr);
cache->mr = NULL;
} }
/* Called from RCU critical section. This function has the same /* Called from RCU critical section. This function has the same