Patch "usb: Add USB 3.1 Precision time measurement capability descriptor support" has been added to the 4.4-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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

    usb: Add USB 3.1 Precision time measurement capability descriptor support

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-add-usb-3.1-precision-time-measurement-capability-descriptor-support.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 faee822c5a7ab99de25cd34fcde3f8d37b6b9923 Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Date: Fri, 12 Feb 2016 16:40:14 +0200
Subject: usb: Add USB 3.1 Precision time measurement capability descriptor support

From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>

commit faee822c5a7ab99de25cd34fcde3f8d37b6b9923 upstream.

USB 3.1 devices that support precision time measurement have an
additional PTM cabaility descriptor as part of the full BOS descriptor

Look for this descriptor while parsing the BOS descriptor, and store it in
struct usb_hub_bos if it exists.

Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/core/config.c    |    3 +++
 include/linux/usb.h          |    1 +
 include/uapi/linux/usb/ch9.h |   10 ++++++++++
 3 files changed, 14 insertions(+)

--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -959,6 +959,9 @@ int usb_get_bos_descriptor(struct usb_de
 			dev->bos->ss_id =
 				(struct usb_ss_container_id_descriptor *)buffer;
 			break;
+		case USB_PTM_CAP_TYPE:
+			dev->bos->ptm_cap =
+				(struct usb_ptm_cap_descriptor *)buffer;
 		default:
 			break;
 		}
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -330,6 +330,7 @@ struct usb_host_bos {
 	struct usb_ss_cap_descriptor	*ss_cap;
 	struct usb_ssp_cap_descriptor	*ssp_cap;
 	struct usb_ss_container_id_descriptor	*ss_id;
+	struct usb_ptm_cap_descriptor	*ptm_cap;
 };
 
 int __usb_get_extra_descriptor(char *buffer, unsigned size,
--- a/include/uapi/linux/usb/ch9.h
+++ b/include/uapi/linux/usb/ch9.h
@@ -895,6 +895,16 @@ struct usb_ssp_cap_descriptor {
 #define USB_SSP_SUBLINK_SPEED_LSM	(0xff << 16)	/* Lanespeed mantissa */
 } __attribute__((packed));
 
+/*
+ * Precision time measurement capability descriptor: advertised by devices and
+ * hubs that support PTM
+ */
+#define	USB_PTM_CAP_TYPE	0xb
+struct usb_ptm_cap_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+	__u8  bDevCapabilityType;
+} __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 


Patches currently in stable-queue which might be from mathias.nyman@xxxxxxxxxxxxxxx are

queue-4.4/usb-xhci-fix-panic-in-xhci_free_virt_devices_depth_first.patch
queue-4.4/usb-add-usb-3.1-precision-time-measurement-capability-descriptor-support.patch



[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]