From 01fdf179f4b064d4c9d30b39aba178caf32649f4 Mon Sep 17 00:00:00 2001 From: Mans Rullgard Date: Tue, 19 Feb 2019 14:52:26 +0000 Subject: [PATCH] usb: core: skip interfaces disabled in devicetree If an interface has an associated devicetree node with status disabled, do not register the device. This is useful for boards with a built-in multifunction USB device where some functions are broken or otherwise undesired. Signed-off-by: Mans Rullgard Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/message.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 4f33eb6..82239f2 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -2006,6 +2006,13 @@ free_interfaces: for (i = 0; i < nintf; ++i) { struct usb_interface *intf = cp->interface[i]; + if (intf->dev.of_node && + !of_device_is_available(intf->dev.of_node)) { + dev_info(&dev->dev, "skipping disabled interface %d\n", + intf->cur_altsetting->desc.bInterfaceNumber); + continue; + } + dev_dbg(&dev->dev, "adding %s (config #%d, interface %d)\n", dev_name(&intf->dev), configuration, -- 2.7.4