This is a note to let you know that I've just added the patch titled

usb/gadget: Fix "high bandwidth" check in usb_gadget_ep_match_desc()

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: usb-gadget-fix-high-bandwidth-check-in-usb_gadget_ep_match_desc.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 11fb37998759c48e4e4c200c974593cbeab25d3e Mon Sep 17 00:00:00 2001

From: Benjamin Herrenschmidt benh@kernel.crashing.org Date: Fri, 12 Jan 2018 17:50:02 +1100 Subject: usb/gadget: Fix "high bandwidth" check in usb_gadget_ep_match_desc()

From: Benjamin Herrenschmidt benh@kernel.crashing.org

commit 11fb37998759c48e4e4c200c974593cbeab25d3e upstream.

The current code tries to test for bits that are masked out by usb_endpoint_maxp(). Instead, use the proper accessor to access the new high bandwidth bits.

Signed-off-by: Benjamin Herrenschmidt benh@kernel.crashing.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/usb/gadget/udc/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -913,7 +913,7 @@ int usb_gadget_ep_match_desc(struct usb_ return 0;

/* "high bandwidth" works only at high speed */ - if (!gadget_is_dualspeed(gadget) && usb_endpoint_maxp(desc) & (3<<11)) + if (!gadget_is_dualspeed(gadget) && usb_endpoint_maxp_mult(desc) > 1) return 0;

switch (type) {

Patches currently in stable-queue which might be from benh@kernel.crashing.org are

queue-4.9/usb-gadget-fix-high-bandwidth-check-in-usb_gadget_ep_match_desc.patch