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[Qemu-devel] [PATCH qemu] pci: Add missing drop of bus master AS referen

From: Alexey Kardashevskiy
Subject: [Qemu-devel] [PATCH qemu] pci: Add missing drop of bus master AS reference
Date: Mon, 27 Mar 2017 15:40:30 +1100

The recent introduction of a bus master container added
memory_region_add_subregion() into the PCI device registering path but
missed memory_region_del_subregion() in the unregistering path leaving
a reference to the root memory region of the new container.

This adds missing memory_region_del_subregion().

Fixes: 3716d5902d743 ("pci: introduce a bus master container")
Signed-off-by: Alexey Kardashevskiy <address@hidden>
 hw/pci/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index e6b08e1988..bd8043c460 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -869,6 +869,8 @@ static void do_pci_unregister_device(PCIDevice *pci_dev)
     pci_dev->bus->devices[pci_dev->devfn] = NULL;
+    memory_region_del_subregion(&pci_dev->bus_master_container_region,
+                                &pci_dev->bus_master_enable_region);

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