[PATCHv2 4/6] qemu: Add support for "none" USB controller

[Peter Krempa <pkrempa@xxxxxxxxxx>]

This patch enables the "none" USB controller for qemu guests and adds
valdiation on hot-plugged devices if the guest has USB disabled.
---
 src/qemu/qemu_command.c |    7 +++++++
 src/qemu/qemu_driver.c  |    6 ++++++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index d202425..d828abc 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -4786,6 +4786,13 @@ qemuBuildCommandLine(virConnectPtr conn,
                 cont->type == VIR_DOMAIN_CONTROLLER_TYPE_FDC)
                 continue;

+             /* Also, skip USB controllers with type none.*/
+            if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
+                cont->model == VIR_DOMAIN_CONTROLLER_MODEL_USB_NONE) {
+                usbcontroller = -1; /* mark we don't want a controller */
+                continue;
+            }
+
             /* Only recent QEMU implements a SATA (AHCI) controller */
             if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_SATA) {
                 if (!qemuCapsGet(qemuCaps, QEMU_CAPS_ICH9_AHCI)) {
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 5e831b7..96b58a0 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5827,6 +5827,9 @@ qemuDomainModifyDeviceFlags(virDomainPtr dom, const char *xml,
     }

     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+        if (virDomainDefCompatibleDevice(vmdef, dev) < 0)
+            goto endjob;
+
         /* Make a copy for updated domain. */
         vmdef = virDomainObjCopyPersistentDef(driver->caps, vm);
         if (!vmdef)
@@ -5852,6 +5855,9 @@ qemuDomainModifyDeviceFlags(virDomainPtr dom, const char *xml,
     }

     if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+        if (virDomainDefCompatibleDevice(vm->def, dev_copy) < 0)
+            goto endjob;
+
         switch (action) {
         case QEMU_DEVICE_ATTACH:
             ret = qemuDomainAttachDeviceLive(vm, dev_copy, dom);
-- 
1.7.8.6

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