s390x/pci: separate s390_sclp_configure function

Split s390_sclp_configure() into separate functions for sclp
configuring and deconfiguring in order to make the code more readable.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

hw/s390x/s390-pci-bus.c

@@ -106,22 +106,42 @@ S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid)
     return NULL;
 }
 
-void s390_pci_sclp_configure(int configure, SCCB *sccb)
+void s390_pci_sclp_configure(SCCB *sccb)
 {
     PciCfgSccb *psccb = (PciCfgSccb *)sccb;
     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
     uint16_t rc;
 
     if (pbdev) {
-        if ((configure == 1 && pbdev->configured == true) ||
-            (configure == 0 && pbdev->configured == false)) {
+        if (pbdev->configured) {
+            rc = SCLP_RC_NO_ACTION_REQUIRED;
+        } else {
+            pbdev->configured = true;
+            rc = SCLP_RC_NORMAL_COMPLETION;
+        }
+    } else {
+        DPRINTF("sclp config no dev found\n");
+        rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
+    }
+
+    psccb->header.response_code = cpu_to_be16(rc);
+}
+
+void s390_pci_sclp_deconfigure(SCCB *sccb)
+{
+    PciCfgSccb *psccb = (PciCfgSccb *)sccb;
+    S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
+    uint16_t rc;
+
+    if (pbdev) {
+        if (!pbdev->configured) {
             rc = SCLP_RC_NO_ACTION_REQUIRED;
         } else {
-            pbdev->configured = !pbdev->configured;
+            pbdev->configured = false;
             rc = SCLP_RC_NORMAL_COMPLETION;
         }
     } else {
-        DPRINTF("sclp config %d no dev found\n", configure);
+        DPRINTF("sclp deconfig no dev found\n");
         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
     }
 

hw/s390x/s390-pci-bus.h

@@ -247,7 +247,8 @@ typedef struct S390pciState {
 
 int chsc_sei_nt2_get_event(void *res);
 int chsc_sei_nt2_have_event(void);
-void s390_pci_sclp_configure(int configure, SCCB *sccb);
+void s390_pci_sclp_configure(SCCB *sccb);
+void s390_pci_sclp_deconfigure(SCCB *sccb);
 void s390_pcihost_iommu_configure(S390PCIBusDevice *pbdev, bool enable);
 S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx);
 S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh);

hw/s390x/sclp.c

@@ -357,10 +357,10 @@ static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code)
         sclp_c->unassign_storage(sclp, sccb);
         break;
     case SCLP_CMDW_CONFIGURE_PCI:
-        s390_pci_sclp_configure(1, sccb);
+        s390_pci_sclp_configure(sccb);
         break;
     case SCLP_CMDW_DECONFIGURE_PCI:
-        s390_pci_sclp_configure(0, sccb);
+        s390_pci_sclp_deconfigure(sccb);
         break;
     default:
         efc->command_handler(ef, sccb, code);