qemu: Replace use of virDomainDiskFindByBusAndDst with virDomainDiskByTarget

In both replaced cases we have other code that verifies that the bus
can't be changed or that the target is unique, so limiting the search to
disks with same bus makes no sense.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NDaniel Henrique Barboza <danielhb413@gmail.com>

src/qemu/qemu_driver.c

@@ -7978,12 +7978,9 @@ qemuDomainChangeDiskLive(virDomainObjPtr vm,
     virDomainDeviceDef oldDev = { .type = dev->type };
     int ret = -1;
 
-    if (!(orig_disk = virDomainDiskFindByBusAndDst(vm->def,
-                                                   disk->bus, disk->dst))) {
+    if (!(orig_disk = virDomainDiskByTarget(vm->def, disk->dst))) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No device with bus '%s' and target '%s'"),
-                       virDomainDiskBusTypeToString(disk->bus),
-                       disk->dst);
+                       _("disk '%s' not found"), disk->dst);
         goto cleanup;
     }
 

src/qemu/qemu_hotplug.c

@@ -1092,7 +1092,7 @@ qemuDomainAttachDeviceDiskLive(virQEMUDriverPtr driver,
      * for devices supporting media changes */
     if ((disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM ||
          disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY) &&
-        (orig_disk = virDomainDiskFindByBusAndDst(vm->def, disk->bus, disk->dst))) {
+        (orig_disk = virDomainDiskByTarget(vm->def, disk->dst))) {
         if (qemuDomainChangeEjectableMedia(driver, vm, orig_disk,
                                            disk->src, false) < 0)
             return -1;