[PATCH 1/2] qemu: Clean up qemuBuildControllerDevCommandLine()

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Add a cleanup: label, which will be used later, and improve
the readability of one of the checks by making it conform to
our formatting standard and moving a comment.

Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
---
 src/qemu/qemu_command.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 9a27987d4..83430b33f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3122,6 +3122,7 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
         VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL,
         VIR_DOMAIN_CONTROLLER_TYPE_CCID,
     };
+    int ret = -1;
 
     for (j = 0; j < ARRAY_CARDINALITY(contOrder); j++) {
         for (i = 0; i < def->ncontrollers; i++) {
@@ -3183,7 +3184,7 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
                     virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                                    _("Multiple legacy USB controllers are "
                                      "not supported"));
-                    return -1;
+                    goto cleanup;
                 }
                 usblegacy = true;
                 continue;
@@ -3191,7 +3192,7 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
 
             if (qemuBuildControllerDevStr(def, cont, qemuCaps,
                                           &devstr, &usbcontroller) < 0)
-                return -1;
+                goto cleanup;
 
             if (devstr) {
                 virCommandAddArg(cmd, "-device");
@@ -3201,16 +3202,20 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
         }
     }
 
-    /* We haven't added any USB controller yet, but we haven't been asked
-     * not to add one either. Add a legacy USB controller, unless we're
-     * creating a kind of guest we want to keep legacy-free */
     if (usbcontroller == 0 &&
         !qemuDomainIsQ35(def) &&
         !qemuDomainIsVirt(def) &&
-        !ARCH_IS_S390(def->os.arch))
+        !ARCH_IS_S390(def->os.arch)) {
+        /* We haven't added any USB controller yet, but we haven't been asked
+         * not to add one either. Add a legacy USB controller, unless we're
+         * creating a kind of guest we want to keep legacy-free */
         virCommandAddArg(cmd, "-usb");
+    }
 
-    return 0;
+    ret = 0;
+
+ cleanup:
+    return ret;
 }
 
 
-- 
2.13.5

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