designware_pcie_root_realize() uses get_system_memory()
as the "host side memory region", as opposed to the "PCI
side" one. Introduce the 'host_mem' variable for clarity.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Gustavo Romero <gustavo.romero@linaro.org>
Message-Id: <20231012121857.31873-4-philmd@linaro.org>
---
 hw/pci-host/designware.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/pci-host/designware.c b/hw/pci-host/designware.c
index c8ec5e8ba9..5d0f2ad703 100644
--- a/hw/pci-host/designware.c
+++ b/hw/pci-host/designware.c
@@ -395,6 +395,7 @@ static void designware_pcie_root_realize(PCIDevice *dev, Error **errp)
 {
     DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(dev);
     DesignwarePCIEHost *host = designware_pcie_root_to_host(root);
+    MemoryRegion *host_mem = get_system_memory();
     MemoryRegion *address_space = &host->pci.memory;
     PCIBridge *br = PCI_BRIDGE(dev);
     DesignwarePCIEViewport *viewport;
@@ -435,7 +436,7 @@ static void designware_pcie_root_realize(PCIDevice *dev, Error **errp)
         viewport->cr[0]   = DESIGNWARE_PCIE_ATU_TYPE_MEM;
 
         source      = &host->pci.address_space_root;
-        destination = get_system_memory();
+        destination = host_mem;
         direction   = "Inbound";
 
         /*
@@ -460,7 +461,7 @@ static void designware_pcie_root_realize(PCIDevice *dev, Error **errp)
 
         destination = &host->pci.memory;
         direction   = "Outbound";
-        source      = get_system_memory();
+        source      = host_mem;
 
         /*
          * Configure MemoryRegion implementing CPU -> PCI memory
-- 
2.45.2