From 2a159389bf5d962359349a76827b2f683276a1c7 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 25 Aug 2014 17:51:26 +0200 Subject: USB: core: add device-qualifier quirk MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add new quirk for devices that cannot handle requests for the device_qualifier descriptor. A USB-2.0 compliant device must respond to requests for the device_qualifier descriptor (even if it's with a request error), but at least one device is known to misbehave after such a request. Suggested-by: Bjørn Mork Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/usb/core') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index d481c99..c01b724 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4538,6 +4538,9 @@ check_highspeed (struct usb_hub *hub, struct usb_device *udev, int port1) struct usb_qualifier_descriptor *qual; int status; + if (udev->quirks & USB_QUIRK_DEVICE_QUALIFIER) + return; + qual = kmalloc (sizeof *qual, GFP_KERNEL); if (qual == NULL) return; -- cgit v1.1