1 files changed, 15 insertions, 0 deletions
diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
index 39b1f74442..32ae8b2c0a 100644
--- a/hw/acpi/pcihp.c
+++ b/hw/acpi/pcihp.c
@@ -147,6 +147,21 @@ static PCIBus *acpi_pcihp_find_hotplug_bus(AcpiPciHpState *s, int bsel)
     if (!bsel && !find.bus) {
         find.bus = s->root;
     }
+
+    /*
+     * Check if find.bus is actually hotpluggable. If bsel is set to
+     * NULL for example on the root bus in order to make it
+     * non-hotpluggable, find.bus will match the root bus when bsel
+     * is 0. See acpi_pcihp_test_hotplug_bus() above. Since the
+     * bus is not hotpluggable however, we should not select the bus.
+     * Instead, we should set find.bus to NULL in that case. In the check
+     * below, we generalize this case for all buses, not just the root bus.
+     * The callers of this function check for a null return value and
+     * handle them appropriately.
+     */
+    if (find.bus && !qbus_is_hotpluggable(BUS(find.bus))) {
+        find.bus = NULL;
+    }
     return find.bus;
 }