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-rw-r--r--0002-HID-multitouch-don-t-check-HID_GROUP_MULTITOUCH_WIN_.patch44
1 files changed, 44 insertions, 0 deletions
diff --git a/0002-HID-multitouch-don-t-check-HID_GROUP_MULTITOUCH_WIN_.patch b/0002-HID-multitouch-don-t-check-HID_GROUP_MULTITOUCH_WIN_.patch
new file mode 100644
index 00000000000..d6da6346b4a
--- /dev/null
+++ b/0002-HID-multitouch-don-t-check-HID_GROUP_MULTITOUCH_WIN_.patch
@@ -0,0 +1,44 @@
+From 0aaacf083be5b68a830f9e174f9abee3b00c5a51 Mon Sep 17 00:00:00 2001
+Message-Id: <0aaacf083be5b68a830f9e174f9abee3b00c5a51.1530402641.git.joeypabalinas@gmail.com>
+In-Reply-To: <cover.1530402641.git.joeypabalinas@gmail.com>
+References: <cover.1530402641.git.joeypabalinas@gmail.com>
+From: Joey Pabalinas <joeypabalinas@gmail.com>
+To: linux-input@vger.kernel.org
+CC: linux-kernel@vger.kernel.org
+CC: Jiri Kosina <jikos@kernel.org>
+CC: Benjamin Tissoires <benjamin.tissoires@redhat.com>
+CC: Daniel Martin <consume.noise@gmail.com>
+CC: Joey Pabalinas <joeypabalinas@gmail.com>
+Date: Sat, 30 Jun 2018 13:23:05 -1000
+Subject: [PATCH 2/4] HID: multitouch: don't check HID_GROUP_MULTITOUCH_WIN_8 for serial protocol
+
+The HID_GROUP_MULTITOUCH_WIN_8 group never needs to check for the serial
+protocol, so avoid setting `td->serial_maybe = true;` in order to avoid
+an unnecessary mt_post_parse_default_settings() call
+
+Signed-off-by: Joey Pabalinas <joeypabalinas@gmail.com>
+
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
+index a793076139d7d0db9b..c0654db0b736543ca0 100644
+--- a/drivers/hid/hid-multitouch.c
++++ b/drivers/hid/hid-multitouch.c
+@@ -1460,11 +1460,13 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
+ if (!td->fields) {
+ dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
+ return -ENOMEM;
+ }
+
+- if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
++ if (id->vendor == HID_ANY_ID
++ && id->product == HID_ANY_ID
++ && id->group != HID_GROUP_MULTITOUCH_WIN_8)
+ td->serial_maybe = true;
+
+ /* This allows the driver to correctly support devices
+ * that emit events over several HID messages.
+ */
+--
+2.18.0
+