[libvirt] PATCH: 11/28: Reduce return points for UML driver

[Ron Yorston]

"Daniel P. Berrange" <berrange at redhat.com> wrote:
> static int umlDomainShutdown(virDomainPtr dom) {
>-    struct uml_driver *driver = (struct uml_driver *)dom->conn->privateData;
>-    virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id);
>-    char* info;
>+    struct uml_driver *driver = dom->conn->privateData;
>+    virDomainObjPtr vm;
>+    char *info;
>+    int ret = -1;
> 
>+    vm = virDomainFindByID(&driver->domains, dom->id);
>     if (!vm) {
>         umlReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN,
>                          _("no domain with matching id %d"), dom->id);
>-        return -1;
>+        goto cleanup;
>     }
> 
> #if 0
>     if (umlMonitorCommand(driver, vm, "system_powerdown", &info) < 0) {
>         umlReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
>                          "%s", _("shutdown operation failed"));
>-        return -1;
>+        goto cleanup;
>     }
>+    ret = 0;
> #endif
>+
>+cleanup:
>     VIR_FREE(info);
>-    return 0;
>+    return ret;
> 
> }

info should be initialised to NULL, otherwise the VIR_FREE will fail.
With the umlMonitorCommand if'ed out this is also broken before the
patch, which is how I came to notice it.

Ron