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authorJohan Hovold <johan@kernel.org>2014-08-25 17:51:26 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-09-23 21:15:39 -0700
commit2a159389bf5d962359349a76827b2f683276a1c7 (patch)
tree55877b54e9fe9c7750833078d1afb8eb6977b8b6 /drivers/usb/core
parentbf17eba7ae1e813b0ad67cb1078dcbd7083b906e (diff)
downloadop-kernel-dev-2a159389bf5d962359349a76827b2f683276a1c7.zip
op-kernel-dev-2a159389bf5d962359349a76827b2f683276a1c7.tar.gz
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.c3
1 files changed, 3 insertions, 0 deletions
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;
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