[PATCH v8 3/7] usb: interface authorization: Control interface probing and claiming

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Driver probings and interface claims get rejected
if an interface is not authorized.

Signed-off-by: Stefan Koch <skoch@xxxxxxx>
---
 drivers/usb/core/driver.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 818369a..d542d43 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -295,6 +295,10 @@ static int usb_probe_interface(struct device *dev)
 	if (udev->authorized == 0) {
 		dev_err(&intf->dev, "Device is not authorized for usage\n");
 		return error;
+	} else if (intf->authorized == 0) {
+		dev_err(&intf->dev, "Interface %d is not authorized for usage\n",
+				intf->altsetting->desc.bInterfaceNumber);
+		return error;
 	}
 
 	id = usb_match_dynamic_id(intf, driver);
@@ -507,6 +511,10 @@ int usb_driver_claim_interface(struct usb_driver *driver,
 	if (dev->driver)
 		return -EBUSY;
 
+	/* reject claim if not iterface is not authorized */
+	if (!iface->authorized)
+		return -ENODEV;
+
 	udev = interface_to_usbdev(iface);
 
 	dev->driver = &driver->drvwrap.driver;
-- 
2.1.4

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