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[3.5.y.z,extended,stable] Patch "HID: clean up quirk for Sony RF receivers" has been added to staging queue

Message ID 1363873666-21289-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques March 21, 2013, 1:47 p.m. UTC 
This is a note to let you know that I have just added a patch titled

    HID: clean up quirk for Sony RF receivers

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From 1d7c6a65f33945a0354a4ffb93ff341b74719496 Mon Sep 17 00:00:00 2001
From: Fernando Luis Vazquez Cao <fernando_b1@lab.ntt.co.jp>
Date: Tue, 22 Jan 2013 15:20:38 +0900
Subject: [PATCH] HID: clean up quirk for Sony RF receivers

commit 99d249021abd4341771523ed8dd7946276103432 upstream.

Document what the fix-up is does and make it more robust by ensuring
that it is only applied to the USB interface that corresponds to the
mouse (sony_report_fixup() is called once per interface during probing).

Cc: linux-input@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/hid/hid-sony.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

--
1.8.1.2
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Patch

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 963bda1..4142c21 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -44,9 +44,19 @@  static __u8 *sony_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 {
 	struct sony_sc *sc = hid_get_drvdata(hdev);

-	if ((sc->quirks & VAIO_RDESC_CONSTANT) &&
-			*rsize >= 56 && rdesc[54] == 0x81 && rdesc[55] == 0x07) {
+	/*
+	 * Some Sony RF receivers wrongly declare the mouse pointer as a
+	 * a constant non-data variable.
+	 */
+	if ((sc->quirks & VAIO_RDESC_CONSTANT) && *rsize >= 56 &&
+	    /* usage page: generic desktop controls */
+	    /* rdesc[0] == 0x05 && rdesc[1] == 0x01 && */
+	    /* usage: mouse */
+	    rdesc[2] == 0x09 && rdesc[3] == 0x02 &&
+	    /* input (usage page for x,y axes): constant, variable, relative */
+	    rdesc[54] == 0x81 && rdesc[55] == 0x07) {
 		hid_info(hdev, "Fixing up Sony RF Receiver report descriptor\n");
+		/* input: data, variable, relative */
 		rdesc[55] = 0x06;
 	}