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

usb: ch9: Add size macro for SSP dev cap descriptor

to the 4.4-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-ch9-add-size-macro-for-ssp-dev-cap-descriptor.patch and it can be found in the queue-4.4 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 446fa3a95df1e8b78f25e1babc41e46edd200821 Mon Sep 17 00:00:00 2001

From: John Youn John.Youn@synopsys.com Date: Fri, 5 Feb 2016 17:05:12 -0800 Subject: usb: ch9: Add size macro for SSP dev cap descriptor

From: John Youn John.Youn@synopsys.com

commit 446fa3a95df1e8b78f25e1babc41e46edd200821 upstream.

The SuperspeedPlus Device Capability Descriptor has a variable size depending on the number of sublink speed attributes.

This patch adds a macro to calculate that size. The macro takes one argument, the Sublink Speed Attribute Count (SSAC) as reported by the descriptor in bmAttributes[4:0].

See USB 3.1 9.6.2.5, Table 9-19.

Signed-off-by: John Youn johnyoun@synopsys.com Signed-off-by: Felipe Balbi balbi@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- include/uapi/linux/usb/ch9.h | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/include/uapi/linux/usb/ch9.h +++ b/include/uapi/linux/usb/ch9.h @@ -906,6 +906,12 @@ struct usb_ptm_cap_descriptor { __u8 bDevCapabilityType; } __attribute__((packed));

+/* + * The size of the descriptor for the Sublink Speed Attribute Count + * (SSAC) specified in bmAttributes[4:0]. + */ +#define USB_DT_USB_SSP_CAP_SIZE(ssac) (16 + ssac * 4) + /*-------------------------------------------------------------------------*/

/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with

Patches currently in stable-queue which might be from John.Youn@synopsys.com are

queue-4.4/usb-ch9-add-size-macro-for-ssp-dev-cap-descriptor.patch