usbip: hide "Not yet implemented" message to improve performance

QubesOS/qubes-issues#531

patches.qubes/usbip-disable-not-implemented-error.patch

@@ -0,0 +1,17 @@
+vhci_get_frame_number is called really often for USB cameras and this message
+alone is responsible for major performance drop. Since the driver seems to
+function ok, simply disable the message for now.
+
+diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
+index 7fbe19d..313a79b 100644
+--- a/drivers/usb/usbip/vhci_hcd.c
++++ b/drivers/usb/usbip/vhci_hcd.c
+@@ -928,7 +928,7 @@ static void vhci_stop(struct usb_hcd *hcd)
+ 
+ static int vhci_get_frame_number(struct usb_hcd *hcd)
+ {
+-	pr_err("Not yet implemented\n");
++	//pr_err("Not yet implemented\n");
+ 	return 0;
+ }
+ 

series.conf

@@ -11,6 +11,8 @@ patches.xen/irq-bind-debug-log.patch
 patches.xen/pvops-blkfront-removable-flag.patch
 patches.xen/pvops-blkfront-eject-support.patch
 
+patches.qubes/usbip-disable-not-implemented-error.patch
+
 # Security fixes
 patches.xen/xsa155-linux-0008-xen-Add-RING_COPY_RESPONSE.patch
 patches.xen/xsa155-linux44-0009-xen-netfront-copy-response-out-of-shared-buffer-befo.patch