From: <gregkh@linuxfoundation.org>
To: John.Youn@synopsys.com, balbi@kernel.org,
gregkh@linuxfoundation.org, johnyoun@synopsys.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "usb: ch9: Add size macro for SSP dev cap descriptor" has been added to the 4.4-stable tree
Date: Thu, 07 Dec 2017 13:44:24 +0100 [thread overview]
Message-ID: <1512650664212218@kroah.com> (raw)
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@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
reply other threads:[~2017-12-07 12:44 UTC|newest]
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