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;a=summary
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@xxxxxxxxxxxxxxx> know about it.
>From 446fa3a95df1e8b78f25e1babc41e46edd200821 Mon Sep 17 00:00:00 2001
From: John Youn <John.Youn@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxx are
queue-4.4/usb-ch9-add-size-macro-for-ssp-dev-cap-descriptor.patch