diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 31473e749e0fa9fcfcb7302e5885619a02871437..b8c6378ba129088d4388766cdaa87bb7c9409891 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -95,6 +95,11 @@ static const VMStateDescription vmstate_ipl = {
      }
 };
 
+static S390IPLState *get_ipl_device(void)
+{
+    return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
+}
+
 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
 {
     uint64_t dstaddr = *(uint64_t *) opaque;
@@ -251,25 +256,19 @@ out:
     return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno);
 }
 
-int s390_ipl_update_diag308(IplParameterBlock *iplb)
+void s390_ipl_update_diag308(IplParameterBlock *iplb)
 {
-    S390IPLState *ipl;
+    S390IPLState *ipl = get_ipl_device();
 
-    ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
-    if (ipl) {
-        ipl->iplb = *iplb;
-        ipl->iplb_valid = true;
-        return 0;
-    }
-    return -1;
+    ipl->iplb = *iplb;
+    ipl->iplb_valid = true;
 }
 
 IplParameterBlock *s390_ipl_get_iplb(void)
 {
-    S390IPLState *ipl;
+    S390IPLState *ipl = get_ipl_device();
 
-    ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
-    if (!ipl || !ipl->iplb_valid) {
+    if (!ipl->iplb_valid) {
         return NULL;
     }
     return &ipl->iplb;
@@ -277,9 +276,8 @@ IplParameterBlock *s390_ipl_get_iplb(void)
 
 void s390_reipl_request(void)
 {
-    S390IPLState *ipl;
+    S390IPLState *ipl = get_ipl_device();
 
-    ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
     ipl->reipl_requested = true;
     qemu_system_reset_request();
 }
diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h
index 70497bc65f46de6e74d75f0588cb31bdf5dc6ff2..6424e08db8904d94489849c7bd6f23f354e497f8 100644
--- a/hw/s390x/ipl.h
+++ b/hw/s390x/ipl.h
@@ -18,7 +18,7 @@ typedef struct IplParameterBlock {
       uint8_t  reserved2[88];
 } IplParameterBlock;
 
-int s390_ipl_update_diag308(IplParameterBlock *iplb);
+void s390_ipl_update_diag308(IplParameterBlock *iplb);
 IplParameterBlock *s390_ipl_get_iplb(void);
 void s390_reipl_request(void);
 
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index 3a19e321c8e28ab1c7cf2c08fc8fdd214ec841ca..ddf2498a3550150194aae95930d32375e07a6032 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -233,11 +233,8 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
         }
         iplb = g_malloc0(sizeof(struct IplParameterBlock));
         cpu_physical_memory_read(addr, iplb, sizeof(struct IplParameterBlock));
-        if (!s390_ipl_update_diag308(iplb)) {
-            env->regs[r1 + 1] = DIAG_308_RC_OK;
-        } else {
-            env->regs[r1 + 1] = DIAG_308_RC_INVALID;
-        }
+        s390_ipl_update_diag308(iplb);
+        env->regs[r1 + 1] = DIAG_308_RC_OK;
         g_free(iplb);
         return;
     case 6: