From dfde4e6e1a868f60033ece0590b1f75e6c57fa16 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Mon, 6 May 2013 10:46:11 +0200 Subject: memory: add ref/unref calls Add ref/unref calls at the following places: - places where memory regions are stashed by a listener and used outside the BQL (including in Xen or KVM). - memory_region_find callsites - creation of aliases and containers (only the aliased/contained region gets a reference to avoid loops) - around calls to del_subregion/add_subregion, where the region could disappear after the first call Signed-off-by: Paolo Bonzini --- hw/misc/vfio.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'hw/misc') diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c index e2e957d6f6..675bbfc97a 100644 --- a/hw/misc/vfio.c +++ b/hw/misc/vfio.c @@ -1969,6 +1969,7 @@ static void vfio_listener_region_add(MemoryListener *listener, DPRINTF("region_add %"HWADDR_PRIx" - %"HWADDR_PRIx" [%p]\n", iova, end - 1, vaddr); + memory_region_ref(section->mr); ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly); if (ret) { error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " @@ -2010,6 +2011,7 @@ static void vfio_listener_region_del(MemoryListener *listener, iova, end - 1); ret = vfio_dma_unmap(container, iova, end - iova); + memory_region_unref(section->mr); if (ret) { error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " "0x%"HWADDR_PRIx") = %d (%m)", -- cgit v1.2.3