pseries: More complete WIMG validation in H_ENTER code

[qemu.git] / hw / empty_slot.c

diff --git a/hw/empty_slot.c b/hw/empty_slot.c
index 664b8d9c4d15f73d6db1ebb0f9d2b0857c5daa41..da8adc4d03e2361680165f2ba281bcdee7fb3f08 100644 (file)
--- a/hw/empty_slot.c
+++ b/hw/empty_slot.c
@@ -53,18 +53,21 @@ static CPUWriteMemoryFunc * const empty_slot_write[3] = {
 
 void empty_slot_init(target_phys_addr_t addr, uint64_t slot_size)
 {
-    DeviceState *dev;
-    SysBusDevice *s;
-    EmptySlot *e;
+    if (slot_size > 0) {
+        /* Only empty slots larger than 0 byte need handling. */
+        DeviceState *dev;
+        SysBusDevice *s;
+        EmptySlot *e;
 
-    dev = qdev_create(NULL, "empty_slot");
-    s = sysbus_from_qdev(dev);
-    e = FROM_SYSBUS(EmptySlot, s);
-    e->size = slot_size;
+        dev = qdev_create(NULL, "empty_slot");
+        s = sysbus_from_qdev(dev);
+        e = FROM_SYSBUS(EmptySlot, s);
+        e->size = slot_size;
 
-    qdev_init_nofail(dev);
+        qdev_init_nofail(dev);
 
-    sysbus_mmio_map(s, 0, addr);
+        sysbus_mmio_map(s, 0, addr);
+    }
 }
 
 static int empty_slot_init1(SysBusDevice *dev)