From b28ae436288861916de0019a81b9817366fe35a9 Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@googlemail.com>
Date: Sat, 8 Oct 2011 23:20:17 +0200
Subject: [PATCH] HID: wacom: Set input bits before registration

We shouldn't change the event flags of input devices after they get registered.
Otherwise, udev will not get notified of these flags and cannot setup the
devices properly.
This fixes the probing to set the input event flags on the input_mapped callback
instead of the probe function.

Reported-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-wacom.c |   80 +++++++++++++++++++++++++---------------------
 1 files changed, 43 insertions(+), 37 deletions(-)

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 72ca689..1492728 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -304,11 +304,51 @@ static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
 	return 1;
 }
 
+static int wacom_input_mapped(struct hid_device *hdev, struct hid_input *hi,
+	struct hid_field *field, struct hid_usage *usage, unsigned long **bit,
+								int *max)
+{
+	struct input_dev *input = hi->input;
+
+	__set_bit(INPUT_PROP_POINTER, input->propbit);
+
+	/* Basics */
+	input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
+
+	__set_bit(REL_WHEEL, input->relbit);
+
+	__set_bit(BTN_TOOL_PEN, input->keybit);
+	__set_bit(BTN_TOUCH, input->keybit);
+	__set_bit(BTN_STYLUS, input->keybit);
+	__set_bit(BTN_STYLUS2, input->keybit);
+	__set_bit(BTN_LEFT, input->keybit);
+	__set_bit(BTN_RIGHT, input->keybit);
+	__set_bit(BTN_MIDDLE, input->keybit);
+
+	/* Pad */
+	input->evbit[0] |= BIT(EV_MSC);
+
+	__set_bit(MSC_SERIAL, input->mscbit);
+
+	__set_bit(BTN_0, input->keybit);
+	__set_bit(BTN_1, input->keybit);
+	__set_bit(BTN_TOOL_FINGER, input->keybit);
+
+	/* Distance, rubber and mouse */
+	__set_bit(BTN_TOOL_RUBBER, input->keybit);
+	__set_bit(BTN_TOOL_MOUSE, input->keybit);
+
+	input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
+	input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
+	input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
+	input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
+
+	return 0;
+}
+
 static int wacom_probe(struct hid_device *hdev,
 		const struct hid_device_id *id)
 {
-	struct hid_input *hidinput;
-	struct input_dev *input;
 	struct wacom_data *wdata;
 	int ret;
 
@@ -370,41 +410,6 @@ static int wacom_probe(struct hid_device *hdev,
 		goto err_ac;
 	}
 #endif
-	hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
-	input = hidinput->input;
-
-	__set_bit(INPUT_PROP_POINTER, input->propbit);
-
-	/* Basics */
-	input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
-
-	__set_bit(REL_WHEEL, input->relbit);
-
-	__set_bit(BTN_TOOL_PEN, input->keybit);
-	__set_bit(BTN_TOUCH, input->keybit);
-	__set_bit(BTN_STYLUS, input->keybit);
-	__set_bit(BTN_STYLUS2, input->keybit);
-	__set_bit(BTN_LEFT, input->keybit);
-	__set_bit(BTN_RIGHT, input->keybit);
-	__set_bit(BTN_MIDDLE, input->keybit);
-
-	/* Pad */
-	input->evbit[0] |= BIT(EV_MSC);
-
-	__set_bit(MSC_SERIAL, input->mscbit);
-
-	__set_bit(BTN_0, input->keybit);
-	__set_bit(BTN_1, input->keybit);
-	__set_bit(BTN_TOOL_FINGER, input->keybit);
-
-	/* Distance, rubber and mouse */
-	__set_bit(BTN_TOOL_RUBBER, input->keybit);
-	__set_bit(BTN_TOOL_MOUSE, input->keybit);
-
-	input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
-	input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
-	input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
-	input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
 
 	return 0;
 
@@ -448,6 +453,7 @@ static struct hid_driver wacom_driver = {
 	.probe = wacom_probe,
 	.remove = wacom_remove,
 	.raw_event = wacom_raw_event,
+	.input_mapped = wacom_input_mapped,
 };
 
 static int __init wacom_init(void)
-- 
1.7.7.1