qemu: domain: Process only one object in qemuDomainPrepareDiskSourceTLS

Remove the loop from qemuDomainPrepareDiskSourceTLS and rename it to
qemuDomainPrepareStorageSourceTLS. Currently there is no backing chain
to prepare so fixing one device is equivalent. In the future it will be
reused in a function which will do the looping.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_domain.c

@@ -9955,7 +9955,7 @@ qemuProcessPrepareStorageSourceTLSVxhs(virStorageSourcePtr src,
 
 
 /* qemuProcessPrepareDiskSourceTLS:
- * @source: pointer to host interface data for disk device
+ * @source: source for a disk
  * @cfg: driver configuration
  *
  * Updates host interface TLS encryption setting based on qemu.conf
@@ -9965,17 +9965,14 @@ qemuProcessPrepareStorageSourceTLSVxhs(virStorageSourcePtr src,
  * Returns 0 on success, -1 on bad config/failure
  */
 static int
-qemuDomainPrepareDiskSourceTLS(virStorageSourcePtr src,
-                               virQEMUDriverConfigPtr cfg)
+qemuDomainPrepareStorageSourceTLS(virStorageSourcePtr src,
+                                  virQEMUDriverConfigPtr cfg)
 {
-    virStorageSourcePtr next;
 
-    for (next = src; virStorageSourceIsBacking(next); next = next->backingStore) {
-        if (next->type == VIR_STORAGE_TYPE_NETWORK &&
-            next->protocol == VIR_STORAGE_NET_PROTOCOL_VXHS &&
-            qemuProcessPrepareStorageSourceTLSVxhs(next, cfg) < 0)
-            return -1;
-    }
+    if (src->type == VIR_STORAGE_TYPE_NETWORK &&
+        src->protocol == VIR_STORAGE_NET_PROTOCOL_VXHS &&
+        qemuProcessPrepareStorageSourceTLSVxhs(src, cfg) < 0)
+        return -1;
 
     return 0;
 }
@@ -12504,7 +12501,7 @@ qemuDomainPrepareDiskSource(virDomainDiskDefPtr disk,
     if (qemuDomainPrepareDiskSourceLegacy(disk, priv, cfg) < 0)
         return -1;
 
-    if (qemuDomainPrepareDiskSourceTLS(disk->src, cfg) < 0)
+    if (qemuDomainPrepareStorageSourceTLS(disk->src, cfg) < 0)
         return -1;
 
     return 0;