diff options
| author | Johan Hovold <johan@kernel.org> | 2014-08-25 17:51:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-23 21:15:39 -0700 |
| commit | 2a159389bf5d962359349a76827b2f683276a1c7 (patch) | |
| tree | 55877b54e9fe9c7750833078d1afb8eb6977b8b6 /drivers/usb/core | |
| parent | bf17eba7ae1e813b0ad67cb1078dcbd7083b906e (diff) | |
USB: core: add device-qualifier quirk
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 <bjorn@mork.no>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/hub.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index d481c99a20d..c01b7246752 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; |