From b40272e4d0e6d07a0bf9409e5f95d622422cd73d Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Wed, 5 Feb 2014 16:33:19 -0500
Subject: HID: remove hidinput_input_event handler

All the different transport drivers use now the generic event handling
in hid-input. We can remove the handler definitively now.

Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-input.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers/hid/hid-input.c')

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index d50e7313b171..e5bb3c378292 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1263,9 +1263,7 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	}
 
 	input_set_drvdata(input_dev, hid);
-	if (hid->ll_driver->hidinput_input_event)
-		input_dev->event = hid->ll_driver->hidinput_input_event;
-	else if (hid->ll_driver->request || hid->hid_output_raw_report)
+	if (hid->ll_driver->request || hid->hid_output_raw_report)
 		input_dev->event = hidinput_input_event;
 	input_dev->open = hidinput_open;
 	input_dev->close = hidinput_close;
-- 
cgit v1.2.3


From cafebc058bf86e63fff5354864781d3de11e41d3 Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Wed, 5 Feb 2014 16:33:22 -0500
Subject: HID: remove hid_get_raw_report in struct hid_device

dev->hid_get_raw_report(X) and hid_hw_raw_request(X, HID_REQ_GET_REPORT)
are strictly equivalent. Switch the hid subsystem to the hid_hw notation
and remove the field .hid_get_raw_report in struct hid_device.

Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-input.c       | 6 +++---
 drivers/hid/hid-sony.c        | 3 ++-
 drivers/hid/hidraw.c          | 7 ++++---
 drivers/hid/i2c-hid/i2c-hid.c | 1 -
 drivers/hid/uhid.c            | 1 -
 drivers/hid/usbhid/hid-core.c | 1 -
 include/linux/hid.h           | 3 ---
 net/bluetooth/hidp/core.c     | 1 -
 8 files changed, 9 insertions(+), 14 deletions(-)

(limited to 'drivers/hid/hid-input.c')

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index e5bb3c378292..5bd17b256856 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -350,9 +350,9 @@ static int hidinput_get_battery_property(struct power_supply *psy,
 			ret = -ENOMEM;
 			break;
 		}
-		ret = dev->hid_get_raw_report(dev, dev->battery_report_id,
-					      buf, 2,
-					      dev->battery_report_type);
+		ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
+					 dev->battery_report_type,
+					 HID_REQ_GET_REPORT);
 
 		if (ret != 2) {
 			ret = -ENODATA;
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 12354055d474..3930acbdee98 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -706,7 +706,8 @@ static int sixaxis_set_operational_usb(struct hid_device *hdev)
 	if (!buf)
 		return -ENOMEM;
 
-	ret = hdev->hid_get_raw_report(hdev, 0xf2, buf, 17, HID_FEATURE_REPORT);
+	ret = hid_hw_raw_request(hdev, 0xf2, buf, 17, HID_FEATURE_REPORT,
+				 HID_REQ_GET_REPORT);
 
 	if (ret < 0)
 		hid_err(hdev, "can't set operational mode\n");
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index cb0137b3718d..4b2dc956c702 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -189,7 +189,7 @@ static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t
 
 	dev = hidraw_table[minor]->hid;
 
-	if (!dev->hid_get_raw_report) {
+	if (!dev->ll_driver->raw_request) {
 		ret = -ENODEV;
 		goto out;
 	}
@@ -216,14 +216,15 @@ static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t
 
 	/*
 	 * Read the first byte from the user. This is the report number,
-	 * which is passed to dev->hid_get_raw_report().
+	 * which is passed to hid_hw_raw_request().
 	 */
 	if (copy_from_user(&report_number, buffer, 1)) {
 		ret = -EFAULT;
 		goto out_free;
 	}
 
-	ret = dev->hid_get_raw_report(dev, report_number, buf, count, report_type);
+	ret = hid_hw_raw_request(dev, report_number, buf, count, report_type,
+				 HID_REQ_GET_REPORT);
 
 	if (ret < 0)
 		goto out_free;
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index e914f2755491..f4ea7343e823 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -1005,7 +1005,6 @@ static int i2c_hid_probe(struct i2c_client *client,
 
 	hid->driver_data = client;
 	hid->ll_driver = &i2c_hid_ll_driver;
-	hid->hid_get_raw_report = i2c_hid_get_raw_report;
 	hid->hid_output_raw_report = i2c_hid_output_raw_report;
 	hid->dev.parent = &client->dev;
 	ACPI_COMPANION_SET(&hid->dev, ACPI_COMPANION(&client->dev));
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index f5a2b1931143..12439e1eeae2 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -404,7 +404,6 @@ static int uhid_dev_create(struct uhid_device *uhid,
 	hid->uniq[63] = 0;
 
 	hid->ll_driver = &uhid_hid_driver;
-	hid->hid_get_raw_report = uhid_hid_get_raw;
 	hid->hid_output_raw_report = uhid_hid_output_raw;
 	hid->bus = ev->u.create.bus;
 	hid->vendor = ev->u.create.vendor;
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 406497b120ea..b9a770f4d7ae 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1289,7 +1289,6 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *
 
 	usb_set_intfdata(intf, hid);
 	hid->ll_driver = &usb_hid_driver;
-	hid->hid_get_raw_report = usbhid_get_raw_report;
 	hid->hid_output_raw_report = usbhid_output_raw_report;
 	hid->ff_init = hid_pidff_init;
 #ifdef CONFIG_USB_HIDDEV
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 38c307b8138a..c56681a66b0b 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -508,9 +508,6 @@ struct hid_device {							/* device report descriptor */
 				  struct hid_usage *, __s32);
 	void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 
-	/* handler for raw input (Get_Report) data, used by hidraw */
-	int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
-
 	/* handler for raw output data, used by hidraw */
 	int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 02670b30895a..77c4badb3e9d 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -773,7 +773,6 @@ static int hidp_setup_hid(struct hidp_session *session,
 	hid->dev.parent = &session->conn->hcon->dev;
 	hid->ll_driver = &hidp_hid_driver;
 
-	hid->hid_get_raw_report = hidp_get_raw_report;
 	hid->hid_output_raw_report = hidp_output_raw_report;
 
 	/* True if device is blacklisted in drivers/hid/hid-core.c */
-- 
cgit v1.2.3


From 7e845d46b13e7730a3720e978c28117ce422edf9 Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Wed, 5 Feb 2014 16:33:23 -0500
Subject: HID: introduce helper to access hid_output_raw_report()

Add a helper to access hdev->hid_output_raw_report().

To convert the drivers, use the following snippets:

for i in drivers/hid/*.c
do
  sed -i.bak "s/[^ \t]*->hid_output_raw_report(/hid_output_raw_report(/g" $i
done

Then manually fix for checkpatch.pl

Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-input.c        |  2 +-
 drivers/hid/hid-lg.c           |  6 ++++--
 drivers/hid/hid-magicmouse.c   |  2 +-
 drivers/hid/hid-sony.c         |  6 +++---
 drivers/hid/hid-thingm.c       |  4 ++--
 drivers/hid/hid-wacom.c        | 16 +++++++---------
 drivers/hid/hid-wiimote-core.c |  2 +-
 drivers/hid/hidraw.c           |  2 +-
 include/linux/hid.h            | 16 ++++++++++++++++
 9 files changed, 36 insertions(+), 20 deletions(-)

(limited to 'drivers/hid/hid-input.c')

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 5bd17b256856..15959fbae268 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1184,7 +1184,7 @@ static void hidinput_led_worker(struct work_struct *work)
 
 	hid_output_report(report, buf);
 	/* synchronous output report */
-	hid->hid_output_raw_report(hid, buf, len, HID_OUTPUT_REPORT);
+	hid_output_raw_report(hid, buf, len, HID_OUTPUT_REPORT);
 	kfree(buf);
 }
 
diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index 9fe9d4ac3114..76ed7e512dcf 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -692,7 +692,8 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	if (hdev->product == USB_DEVICE_ID_LOGITECH_WII_WHEEL) {
 		unsigned char buf[] = { 0x00, 0xAF,  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
-		ret = hdev->hid_output_raw_report(hdev, buf, sizeof(buf), HID_FEATURE_REPORT);
+		ret = hid_output_raw_report(hdev, buf, sizeof(buf),
+					    HID_FEATURE_REPORT);
 
 		if (ret >= 0) {
 			/* insert a little delay of 10 jiffies ~ 40ms */
@@ -704,7 +705,8 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
 			buf[1] = 0xB2;
 			get_random_bytes(&buf[2], 2);
 
-			ret = hdev->hid_output_raw_report(hdev, buf, sizeof(buf), HID_FEATURE_REPORT);
+			ret = hid_output_raw_report(hdev, buf, sizeof(buf),
+						    HID_FEATURE_REPORT);
 		}
 	}
 
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 3b43d1cfa936..cb5db3afc690 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -538,7 +538,7 @@ static int magicmouse_probe(struct hid_device *hdev,
 	 * but there seems to be no other way of switching the mode.
 	 * Thus the super-ugly hacky success check below.
 	 */
-	ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature),
+	ret = hid_output_raw_report(hdev, feature, sizeof(feature),
 			HID_FEATURE_REPORT);
 	if (ret != -EIO && ret != sizeof(feature)) {
 		hid_err(hdev, "unable to request touch data (%d)\n", ret);
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 3930acbdee98..075089b37236 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -720,7 +720,8 @@ static int sixaxis_set_operational_usb(struct hid_device *hdev)
 static int sixaxis_set_operational_bt(struct hid_device *hdev)
 {
 	unsigned char buf[] = { 0xf4,  0x42, 0x03, 0x00, 0x00 };
-	return hdev->hid_output_raw_report(hdev, buf, sizeof(buf), HID_FEATURE_REPORT);
+	return hid_output_raw_report(hdev, buf, sizeof(buf),
+				     HID_FEATURE_REPORT);
 }
 
 static void buzz_set_leds(struct hid_device *hdev, const __u8 *leds)
@@ -942,8 +943,7 @@ static void sixaxis_state_worker(struct work_struct *work)
 	buf[10] |= sc->led_state[2] << 3;
 	buf[10] |= sc->led_state[3] << 4;
 
-	sc->hdev->hid_output_raw_report(sc->hdev, buf, sizeof(buf),
-					HID_OUTPUT_REPORT);
+	hid_output_raw_report(sc->hdev, buf, sizeof(buf), HID_OUTPUT_REPORT);
 }
 
 static void dualshock4_state_worker(struct work_struct *work)
diff --git a/drivers/hid/hid-thingm.c b/drivers/hid/hid-thingm.c
index 99342cfa0ea2..7dd3197f3b3e 100644
--- a/drivers/hid/hid-thingm.c
+++ b/drivers/hid/hid-thingm.c
@@ -48,8 +48,8 @@ static int blink1_send_command(struct blink1_data *data,
 			buf[0], buf[1], buf[2], buf[3], buf[4],
 			buf[5], buf[6], buf[7], buf[8]);
 
-	ret = data->hdev->hid_output_raw_report(data->hdev, buf,
-			BLINK1_CMD_SIZE, HID_FEATURE_REPORT);
+	ret = hid_output_raw_report(data->hdev, buf, BLINK1_CMD_SIZE,
+				    HID_FEATURE_REPORT);
 
 	return ret < 0 ? ret : 0;
 }
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 60c75dcbbdb8..c720db912edb 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -128,8 +128,7 @@ static void wacom_set_image(struct hid_device *hdev, const char *image,
 
 	rep_data[0] = WAC_CMD_ICON_START_STOP;
 	rep_data[1] = 0;
-	ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
-				HID_FEATURE_REPORT);
+	ret = hid_output_raw_report(hdev, rep_data, 2, HID_FEATURE_REPORT);
 	if (ret < 0)
 		goto err;
 
@@ -143,15 +142,14 @@ static void wacom_set_image(struct hid_device *hdev, const char *image,
 			rep_data[j + 3] = p[(i << 6) + j];
 
 		rep_data[2] = i;
-		ret = hdev->hid_output_raw_report(hdev, rep_data, 67,
+		ret = hid_output_raw_report(hdev, rep_data, 67,
 					HID_FEATURE_REPORT);
 	}
 
 	rep_data[0] = WAC_CMD_ICON_START_STOP;
 	rep_data[1] = 0;
 
-	ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
-				HID_FEATURE_REPORT);
+	ret = hid_output_raw_report(hdev, rep_data, 2, HID_FEATURE_REPORT);
 
 err:
 	return;
@@ -183,7 +181,7 @@ static void wacom_leds_set_brightness(struct led_classdev *led_dev,
 		buf[3] = value;
 		/* use fixed brightness for OLEDs */
 		buf[4] = 0x08;
-		hdev->hid_output_raw_report(hdev, buf, 9, HID_FEATURE_REPORT);
+		hid_output_raw_report(hdev, buf, 9, HID_FEATURE_REPORT);
 		kfree(buf);
 	}
 
@@ -339,7 +337,7 @@ static void wacom_set_features(struct hid_device *hdev, u8 speed)
 		rep_data[0] = 0x03 ; rep_data[1] = 0x00;
 		limit = 3;
 		do {
-			ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+			ret = hid_output_raw_report(hdev, rep_data, 2,
 					HID_FEATURE_REPORT);
 		} while (ret < 0 && limit-- > 0);
 
@@ -352,7 +350,7 @@ static void wacom_set_features(struct hid_device *hdev, u8 speed)
 			rep_data[1] = 0x00;
 			limit = 3;
 			do {
-				ret = hdev->hid_output_raw_report(hdev,
+				ret = hid_output_raw_report(hdev,
 					rep_data, 2, HID_FEATURE_REPORT);
 			} while (ret < 0 && limit-- > 0);
 
@@ -378,7 +376,7 @@ static void wacom_set_features(struct hid_device *hdev, u8 speed)
 		rep_data[0] = 0x03;
 		rep_data[1] = wdata->features;
 
-		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+		ret = hid_output_raw_report(hdev, rep_data, 2,
 					HID_FEATURE_REPORT);
 		if (ret >= 0)
 			wdata->high_speed = speed;
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index abb20db2b443..d7dc6c5bc244 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -35,7 +35,7 @@ static int wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
 	if (!buf)
 		return -ENOMEM;
 
-	ret = hdev->hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
+	ret = hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
 
 	kfree(buf);
 	return ret;
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index 4b2dc956c702..f8708c93f85c 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -153,7 +153,7 @@ static ssize_t hidraw_send_report(struct file *file, const char __user *buffer,
 		goto out_free;
 	}
 
-	ret = dev->hid_output_raw_report(dev, buf, count, report_type);
+	ret = hid_output_raw_report(dev, buf, count, report_type);
 out_free:
 	kfree(buf);
 out:
diff --git a/include/linux/hid.h b/include/linux/hid.h
index c56681a66b0b..a837ede65ec6 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -1011,6 +1011,22 @@ static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
 	return -ENOSYS;
 }
 
+/**
+ * hid_output_raw_report - send an output or a feature report to the device
+ *
+ * @hdev: hid device
+ * @buf: raw data to transfer
+ * @len: length of buf
+ * @report_type: HID_FEATURE_REPORT or HID_OUTPUT_REPORT
+ *
+ * @return: count of data transfered, negative if error
+ */
+static inline int hid_output_raw_report(struct hid_device *hdev, __u8 *buf,
+					size_t len, unsigned char report_type)
+{
+	return hdev->hid_output_raw_report(hdev, buf, len, report_type);
+}
+
 /**
  * hid_hw_idle - send idle request to device
  *
-- 
cgit v1.2.3


From 2ebaebcf31096f83401c850393e93bc8f28db0e9 Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Thu, 20 Feb 2014 15:24:48 -0500
Subject: HID: input: hid-input remove hid_output_raw_report call

hid_output_raw_report() is not a ll_driver callback and should not be used.
To keep the same code path than before, we are forced to play with the
different hid_hw_* calls: if the usb or i2c device does not support
direct output reports, then we will rely on the SET_REPORT HID call.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-input.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'drivers/hid/hid-input.c')

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 15959fbae268..310b96779e8e 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1150,7 +1150,7 @@ static void hidinput_led_worker(struct work_struct *work)
 					      led_work);
 	struct hid_field *field;
 	struct hid_report *report;
-	int len;
+	int len, ret;
 	__u8 *buf;
 
 	field = hidinput_get_led_field(hid);
@@ -1184,7 +1184,10 @@ static void hidinput_led_worker(struct work_struct *work)
 
 	hid_output_report(report, buf);
 	/* synchronous output report */
-	hid_output_raw_report(hid, buf, len, HID_OUTPUT_REPORT);
+	ret = hid_hw_output_report(hid, buf, len);
+	if (ret == -ENOSYS)
+		hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
+				HID_REQ_SET_REPORT);
 	kfree(buf);
 }
 
@@ -1263,7 +1266,8 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	}
 
 	input_set_drvdata(input_dev, hid);
-	if (hid->ll_driver->request || hid->hid_output_raw_report)
+	if (hid->ll_driver->request || hid->ll_driver->output_report ||
+	    hid->ll_driver->raw_request)
 		input_dev->event = hidinput_input_event;
 	input_dev->open = hidinput_open;
 	input_dev->close = hidinput_close;
-- 
cgit v1.2.3


From 3c86726cfe38952f0366f86acfbbb025813ec1c2 Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Thu, 20 Feb 2014 15:24:49 -0500
Subject: HID: make .raw_request mandatory

SET_REPORT and GET_REPORT are mandatory in the HID specification.
Make the corresponding API in hid-core mandatory too, which removes the
need to test against it in some various places.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 Documentation/hid/hid-transport.txt |  3 ++-
 drivers/hid/hid-core.c              | 11 ++++++++---
 drivers/hid/hid-input.c             |  4 +---
 include/linux/hid.h                 |  5 +----
 4 files changed, 12 insertions(+), 11 deletions(-)

(limited to 'drivers/hid/hid-input.c')

diff --git a/Documentation/hid/hid-transport.txt b/Documentation/hid/hid-transport.txt
index 9dbbceaef4f3..3dcba9fd4a3a 100644
--- a/Documentation/hid/hid-transport.txt
+++ b/Documentation/hid/hid-transport.txt
@@ -283,7 +283,8 @@ The available HID callbacks are:
                        int reqtype)
    Same as ->request() but provides the report as raw buffer. This request shall
    be synchronous. A transport driver must not use ->wait() to complete such
-   requests.
+   requests. This request is mandatory and hid core will reject the device if
+   it is missing.
 
  - int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len)
    Send raw output report via intr channel. Used by some HID device drivers
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index b6ae69711d2a..0b57babe3f9f 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1330,9 +1330,6 @@ void __hid_request(struct hid_device *hid, struct hid_report *report,
 	int ret;
 	int len;
 
-	if (!hid->ll_driver->raw_request)
-		return;
-
 	buf = hid_alloc_report_buf(report, GFP_KERNEL);
 	if (!buf)
 		return;
@@ -2471,6 +2468,14 @@ int hid_add_device(struct hid_device *hdev)
 	if (hid_ignore(hdev))
 		return -ENODEV;
 
+	/*
+	 * Check for the mandatory transport channel.
+	 */
+	 if (!hdev->ll_driver->raw_request) {
+		hid_err(hdev, "transport driver missing .raw_request()\n");
+		return -EINVAL;
+	 }
+
 	/*
 	 * Read the device report descriptor once and use as template
 	 * for the driver-specific modifications.
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 310b96779e8e..f5aef792f13b 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1266,9 +1266,7 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	}
 
 	input_set_drvdata(input_dev, hid);
-	if (hid->ll_driver->request || hid->ll_driver->output_report ||
-	    hid->ll_driver->raw_request)
-		input_dev->event = hidinput_input_event;
+	input_dev->event = hidinput_input_event;
 	input_dev->open = hidinput_open;
 	input_dev->close = hidinput_close;
 	input_dev->setkeycode = hidinput_setkeycode;
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 60f3ff762376..5eb282e0dff7 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -992,11 +992,8 @@ static inline int hid_hw_raw_request(struct hid_device *hdev,
 	if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
 		return -EINVAL;
 
-	if (hdev->ll_driver->raw_request)
-		return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
+	return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
 						    rtype, reqtype);
-
-	return -ENOSYS;
 }
 
 /**
-- 
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