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usb: interface authorization: Control interface probing and claiming 

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

Signed-off-by: Stefan Koch <stefan.koch10@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Stefan Koch 2015-08-25 21:10:07 +02:00 committed by Greg Kroah-Hartman
parent 6b2bd3c8c6
commit 8d1f8573a3
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/core/driver.c
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@ -296,6 +296,10 @@ 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);
@ -508,6 +512,10 @@ int usb_driver_claim_interface(struct usb_driver *driver,
if (dev->driver)
return -EBUSY;
/* reject claim if interface is not authorized */
if (!iface->authorized)
return -ENODEV;
udev = interface_to_usbdev(iface);
dev->driver = &driver->drvwrap.driver;