Reverse the logical condition for HDM passthrough support in
pci_expander_bridge. This patch ensures the HDM passthrough condition
is evaluated only when hdm_for_passthrough is set to true, aligning
behavior with intended semantics and comments.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---

This change corrects what appears to be a previous mistake in logic
regarding HDM passthrough conditions.
---
 hw/pci-bridge/pci_expander_bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index 3396ab4bdd..25f8922d76 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -307,7 +307,7 @@ static void pxb_cxl_dev_reset(DeviceState *dev)
      * The CXL specification allows for host bridges with no HDM decoders
      * if they only have a single root port.
      */
-    if (!PXB_CXL_DEV(dev)->hdm_for_passthrough) {
+    if (PXB_CXL_DEV(dev)->hdm_for_passthrough) {
         dsp_count = pcie_count_ds_ports(hb->bus);
     }
     /* Initial reset will have 0 dsp so wait until > 0 */
-- 
2.41.0