Merge tag 'hid-for-linus-2025060301' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid

Pull HID updates from Jiri Kosina:

 - support for Apple Magic Mouse 2 USB-C (Aditya Garg)

 - power management improvement for multitouch devices (Werner Sembach)

 - fix for ACPI initialization in intel-thc driver (Wentao Guan)

 - adaptation of HID drivers to use new gpio_chip's line setter
   callbacks (Bartosz Golaszewski)

 - fix potential OOB in usbhid_parse() (Terry Junge)

 - make it possible to set hid_mouse_ignore_list dynamically (the same
   way we handle other quirks) (Aditya Garg)

 - other small assorted fixes and device ID additions

* tag 'hid-for-linus-2025060301' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: multitouch: Disable touchpad on firmware level while not in use
  HID: core: Add functions for HID drivers to react on first open and last close call
  HID: HID_APPLETB_BL should depend on X86
  HID: HID_APPLETB_KBD should depend on X86
  HID: appletb-kbd: Use secs_to_jiffies() instead of msecs_to_jiffies()
  HID: intel-thc-hid: intel-thc: make read-only arrays static const
  HID: magicmouse: Apple Magic Mouse 2 USB-C support
  HID: mcp2221: use new line value setter callbacks
  HID: mcp2200: use new line value setter callbacks
  HID: cp2112: use new line value setter callbacks
  HID: cp2112: use lock guards
  HID: cp2112: hold the lock for the entire direction_output() call
  HID: cp2112: destroy mutex on driver detach
  HID: intel-thc-hid: intel-quicki2c: pass correct arguments to acpi_evaluate_object
  HID: corsair-void: Use to_delayed_work()
  HID: hid-logitech: use sysfs_emit_at() instead of scnprintf()
  HID: quirks: Add HID_QUIRK_IGNORE_MOUSE quirk
  HID: usbhid: Eliminate recurrent out-of-bounds bug in usbhid_parse()
  HID: Kysona: Add periodic online check

drivers/hid/Kconfig

@@ -151,6 +151,7 @@ config HID_APPLEIR
 config HID_APPLETB_BL
 	tristate "Apple Touch Bar Backlight"
 	depends on BACKLIGHT_CLASS_DEVICE
+	depends on X86 || COMPILE_TEST
 	help
 	  Say Y here if you want support for the backlight of Touch Bars on x86
 	  MacBook Pros.
@@ -163,6 +164,7 @@ config HID_APPLETB_KBD
 	depends on USB_HID
 	depends on BACKLIGHT_CLASS_DEVICE
 	depends on INPUT
+	depends on X86 || COMPILE_TEST
 	select INPUT_SPARSEKMAP
 	select HID_APPLETB_BL
 	help

drivers/hid/hid-appletb-kbd.c

@@ -172,7 +172,8 @@ static void appletb_inactivity_timer(struct timer_list *t)
 		if (!kbd->has_dimmed) {
 			backlight_device_set_brightness(kbd->backlight_dev, 1);
 			kbd->has_dimmed = true;
-			mod_timer(&kbd->inactivity_timer, jiffies + msecs_to_jiffies(appletb_tb_idle_timeout * 1000));
+			mod_timer(&kbd->inactivity_timer,
+				jiffies + secs_to_jiffies(appletb_tb_idle_timeout));
 		} else if (!kbd->has_turned_off) {
 			backlight_device_set_brightness(kbd->backlight_dev, 0);
 			kbd->has_turned_off = true;
@@ -188,7 +189,8 @@ static void reset_inactivity_timer(struct appletb_kbd *kbd)
 			kbd->has_dimmed = false;
 			kbd->has_turned_off = false;
 		}
-		mod_timer(&kbd->inactivity_timer, jiffies + msecs_to_jiffies(appletb_tb_dim_timeout * 1000));
+		mod_timer(&kbd->inactivity_timer,
+			jiffies + secs_to_jiffies(appletb_tb_dim_timeout));
 	}
 }
 
@@ -407,7 +409,8 @@ static int appletb_kbd_probe(struct hid_device *hdev, const struct hid_device_id
 	} else {
 		backlight_device_set_brightness(kbd->backlight_dev, 2);
 		timer_setup(&kbd->inactivity_timer, appletb_inactivity_timer, 0);
-		mod_timer(&kbd->inactivity_timer, jiffies + msecs_to_jiffies(appletb_tb_dim_timeout * 1000));
+		mod_timer(&kbd->inactivity_timer,
+			jiffies + secs_to_jiffies(appletb_tb_dim_timeout));
 	}
 
 	kbd->inp_handler.event = appletb_kbd_inp_event;

drivers/hid/hid-core.c

@@ -2396,6 +2396,9 @@ int hid_hw_open(struct hid_device *hdev)
 		ret = hdev->ll_driver->open(hdev);
 		if (ret)
 			hdev->ll_open_count--;
+
+		if (hdev->driver->on_hid_hw_open)
+			hdev->driver->on_hid_hw_open(hdev);
 	}
 
 	mutex_unlock(&hdev->ll_open_lock);
@@ -2415,8 +2418,12 @@ EXPORT_SYMBOL_GPL(hid_hw_open);
 void hid_hw_close(struct hid_device *hdev)
 {
 	mutex_lock(&hdev->ll_open_lock);
-	if (!--hdev->ll_open_count)
+	if (!--hdev->ll_open_count) {
 		hdev->ll_driver->close(hdev);
+
+		if (hdev->driver->on_hid_hw_close)
+			hdev->driver->on_hid_hw_close(hdev);
+	}
 	mutex_unlock(&hdev->ll_open_lock);
 }
 EXPORT_SYMBOL_GPL(hid_hw_close);

drivers/hid/hid-corsair-void.c

@@ -507,7 +507,7 @@ static void corsair_void_status_work_handler(struct work_struct *work)
 	struct delayed_work *delayed_work;
 	int battery_ret;
 
-	delayed_work = container_of(work, struct delayed_work, work);
+	delayed_work = to_delayed_work(work);
 	drvdata = container_of(delayed_work, struct corsair_void_drvdata,
 			       delayed_status_work);
 
@@ -525,7 +525,7 @@ static void corsair_void_firmware_work_handler(struct work_struct *work)
 	struct delayed_work *delayed_work;
 	int firmware_ret;
 
-	delayed_work = container_of(work, struct delayed_work, work);
+	delayed_work = to_delayed_work(work);
 	drvdata = container_of(delayed_work, struct corsair_void_drvdata,
 			       delayed_firmware_work);
 

drivers/hid/hid-cp2112.c

@@ -17,11 +17,13 @@
  */
 
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/gpio/driver.h>
 #include <linux/hid.h>
 #include <linux/hidraw.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/nls.h>
 #include <linux/string_choices.h>
 #include <linux/usb/ch9.h>
@@ -185,7 +187,7 @@ static int cp2112_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 	u8 *buf = dev->in_out_buffer;
 	int ret;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 
 	ret = hid_hw_raw_request(hdev, CP2112_GPIO_CONFIG, buf,
 				 CP2112_GPIO_CONFIG_LENGTH, HID_FEATURE_REPORT,
@@ -194,7 +196,7 @@ static int cp2112_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 		hid_err(hdev, "error requesting GPIO config: %d\n", ret);
 		if (ret >= 0)
 			ret = -EIO;
-		goto exit;
+		return ret;
 	}
 
 	buf[1] &= ~BIT(offset);
@@ -207,25 +209,19 @@ static int cp2112_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 		hid_err(hdev, "error setting GPIO config: %d\n", ret);
 		if (ret >= 0)
 			ret = -EIO;
-		goto exit;
+		return ret;
 	}
 
-	ret = 0;
-
-exit:
-	mutex_unlock(&dev->lock);
-	return ret;
+	return 0;
 }
 
-static void cp2112_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int cp2112_gpio_set_unlocked(struct cp2112_device *dev,
+				    unsigned int offset, int value)
 {
-	struct cp2112_device *dev = gpiochip_get_data(chip);
 	struct hid_device *hdev = dev->hdev;
 	u8 *buf = dev->in_out_buffer;
 	int ret;
 
-	mutex_lock(&dev->lock);
-
 	buf[0] = CP2112_GPIO_SET;
 	buf[1] = value ? CP2112_GPIO_ALL_GPIO_MASK : 0;
 	buf[2] = BIT(offset);
@@ -236,7 +232,17 @@ static void cp2112_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	if (ret < 0)
 		hid_err(hdev, "error setting GPIO values: %d\n", ret);
 
-	mutex_unlock(&dev->lock);
+	return ret;
+}
+
+static int cp2112_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			   int value)
+{
+	struct cp2112_device *dev = gpiochip_get_data(chip);
+
+	guard(mutex)(&dev->lock);
+
+	return cp2112_gpio_set_unlocked(dev, offset, value);
 }
 
 static int cp2112_gpio_get_all(struct gpio_chip *chip)
@@ -246,23 +252,17 @@ static int cp2112_gpio_get_all(struct gpio_chip *chip)
 	u8 *buf = dev->in_out_buffer;
 	int ret;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 
 	ret = hid_hw_raw_request(hdev, CP2112_GPIO_GET, buf,
 				 CP2112_GPIO_GET_LENGTH, HID_FEATURE_REPORT,
 				 HID_REQ_GET_REPORT);
 	if (ret != CP2112_GPIO_GET_LENGTH) {
 		hid_err(hdev, "error requesting GPIO values: %d\n", ret);
-		ret = ret < 0 ? ret : -EIO;
-		goto exit;
+		return ret < 0 ? ret : -EIO;
 	}
 
-	ret = buf[1];
-
-exit:
-	mutex_unlock(&dev->lock);
-
-	return ret;
+	return buf[1];
 }
 
 static int cp2112_gpio_get(struct gpio_chip *chip, unsigned int offset)
@@ -284,14 +284,14 @@ static int cp2112_gpio_direction_output(struct gpio_chip *chip,
 	u8 *buf = dev->in_out_buffer;
 	int ret;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 
 	ret = hid_hw_raw_request(hdev, CP2112_GPIO_CONFIG, buf,
 				 CP2112_GPIO_CONFIG_LENGTH, HID_FEATURE_REPORT,
 				 HID_REQ_GET_REPORT);
 	if (ret != CP2112_GPIO_CONFIG_LENGTH) {
 		hid_err(hdev, "error requesting GPIO config: %d\n", ret);
-		goto fail;
+		return ret < 0 ? ret : -EIO;
 	}
 
 	buf[1] |= 1 << offset;
@@ -302,22 +302,16 @@ static int cp2112_gpio_direction_output(struct gpio_chip *chip,
 				 HID_REQ_SET_REPORT);
 	if (ret < 0) {
 		hid_err(hdev, "error setting GPIO config: %d\n", ret);
-		goto fail;
+		return ret;
 	}
 
-	mutex_unlock(&dev->lock);
-
 	/*
 	 * Set gpio value when output direction is already set,
 	 * as specified in AN495, Rev. 0.2, cpt. 4.4
 	 */
-	cp2112_gpio_set(chip, offset, value);
+	cp2112_gpio_set_unlocked(dev, offset, value);
 
 	return 0;
-
-fail:
-	mutex_unlock(&dev->lock);
-	return ret < 0 ? ret : -EIO;
 }
 
 static int cp2112_hid_get(struct hid_device *hdev, unsigned char report_number,
@@ -1205,7 +1199,11 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	if (!dev->in_out_buffer)
 		return -ENOMEM;
 
-	mutex_init(&dev->lock);
+	ret = devm_mutex_init(&hdev->dev, &dev->lock);
+	if (ret) {
+		hid_err(hdev, "mutex init failed\n");
+		return ret;
+	}
 
 	ret = hid_parse(hdev);
 	if (ret) {
@@ -1290,7 +1288,7 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	dev->gc.label			= "cp2112_gpio";
 	dev->gc.direction_input		= cp2112_gpio_direction_input;
 	dev->gc.direction_output	= cp2112_gpio_direction_output;
-	dev->gc.set			= cp2112_gpio_set;
+	dev->gc.set_rv			= cp2112_gpio_set;
 	dev->gc.get			= cp2112_gpio_get;
 	dev->gc.base			= -1;
 	dev->gc.ngpio			= CP2112_GPIO_MAX_GPIO;

drivers/hid/hid-hyperv.c

@@ -192,7 +192,7 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device,
 		goto cleanup;
 
 	input_device->report_desc_size = le16_to_cpu(
-					desc->desc[0].wDescriptorLength);
+					desc->rpt_desc.wDescriptorLength);
 	if (input_device->report_desc_size == 0) {
 		input_device->dev_info_status = -EINVAL;
 		goto cleanup;
@@ -210,7 +210,7 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device,
 
 	memcpy(input_device->report_desc,
 	       ((unsigned char *)desc) + desc->bLength,
-	       le16_to_cpu(desc->desc[0].wDescriptorLength));
+	       le16_to_cpu(desc->rpt_desc.wDescriptorLength));
 
 	/* Send the ack */
 	memset(&ack, 0, sizeof(struct mousevsc_prt_msg));

drivers/hid/hid-ids.h

@@ -96,6 +96,7 @@
 #define USB_DEVICE_ID_APPLE_MIGHTYMOUSE	0x0304
 #define USB_DEVICE_ID_APPLE_MAGICMOUSE	0x030d
 #define USB_DEVICE_ID_APPLE_MAGICMOUSE2	0x0269
+#define USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC	0x0323
 #define USB_DEVICE_ID_APPLE_MAGICTRACKPAD	0x030e
 #define USB_DEVICE_ID_APPLE_MAGICTRACKPAD2	0x0265
 #define USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC	0x0324

drivers/hid/hid-kysona.c

@@ -14,6 +14,7 @@
 
 #define BATTERY_TIMEOUT_MS 5000
 
+#define ONLINE_REPORT_ID 3
 #define BATTERY_REPORT_ID 4
 
 struct kysona_drvdata {
@@ -80,11 +81,46 @@ static int kysona_battery_get_property(struct power_supply *psy,
 	return ret;
 }
 
+static const char kysona_online_request[] = {
+	0x08, ONLINE_REPORT_ID, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4a
+};
+
 static const char kysona_battery_request[] = {
 	0x08, BATTERY_REPORT_ID, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x49
 };
 
+static int kysona_m600_fetch_online(struct hid_device *hdev)
+{
+	u8 *write_buf;
+	int ret;
+
+	/* Request online information */
+	write_buf = kmemdup(kysona_online_request, sizeof(kysona_online_request), GFP_KERNEL);
+	if (!write_buf)
+		return -ENOMEM;
+
+	ret = hid_hw_raw_request(hdev, kysona_online_request[0],
+				 write_buf, sizeof(kysona_online_request),
+				 HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
+	if (ret < (int)sizeof(kysona_online_request)) {
+		hid_err(hdev, "hid_hw_raw_request() failed with %d\n", ret);
+		ret = -ENODATA;
+	}
+	kfree(write_buf);
+	return ret;
+}
+
+static void kysona_fetch_online(struct hid_device *hdev)
+{
+	int ret = kysona_m600_fetch_online(hdev);
+
+	if (ret < 0)
+		hid_dbg(hdev,
+			"Online query failed (err: %d)\n", ret);
+}
+
 static int kysona_m600_fetch_battery(struct hid_device *hdev)
 {
 	u8 *write_buf;
@@ -121,6 +157,7 @@ static void kysona_battery_timer_tick(struct work_struct *work)
 		struct kysona_drvdata, battery_work.work);
 	struct hid_device *hdev = drv_data->hdev;
 
+	kysona_fetch_online(hdev);
 	kysona_fetch_battery(hdev);
 	schedule_delayed_work(&drv_data->battery_work,
 			      msecs_to_jiffies(BATTERY_TIMEOUT_MS));
@@ -160,6 +197,7 @@ static int kysona_battery_probe(struct hid_device *hdev)
 	power_supply_powers(drv_data->battery, &hdev->dev);
 
 	INIT_DELAYED_WORK(&drv_data->battery_work, kysona_battery_timer_tick);
+	kysona_fetch_online(hdev);
 	kysona_fetch_battery(hdev);
 	schedule_delayed_work(&drv_data->battery_work,
 			      msecs_to_jiffies(BATTERY_TIMEOUT_MS));
@@ -206,12 +244,16 @@ static int kysona_raw_event(struct hid_device *hdev,
 {
 	struct kysona_drvdata *drv_data = hid_get_drvdata(hdev);
 
-	if (drv_data->battery && size == sizeof(kysona_battery_request) &&
+	if (size == sizeof(kysona_online_request) &&
+	    data[0] == 8 && data[1] == ONLINE_REPORT_ID) {
+		drv_data->online = data[6];
+	}
+
+	if (size == sizeof(kysona_battery_request) &&
 	    data[0] == 8 && data[1] == BATTERY_REPORT_ID) {
 		drv_data->battery_capacity = data[6];
 		drv_data->battery_charging = data[7];
 		drv_data->battery_voltage = (data[8] << 8) | data[9];
-		drv_data->online = true;
 	}
 
 	return 0;

drivers/hid/hid-lg4ff.c

@@ -823,7 +823,7 @@ static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attr
 	for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
 		if (entry->wdata.alternate_modes & BIT(i)) {
 			/* Print tag and full name */
-			count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
+			count += sysfs_emit_at(buf, count, "%s: %s",
 					   lg4ff_alternate_modes[i].tag,
 					   !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
 			if (count >= PAGE_SIZE - 1)
@@ -832,9 +832,9 @@ static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attr
 			/* Mark the currently active mode with an asterisk */
 			if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
 			    (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
-				count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
+				count += sysfs_emit_at(buf, count, " *\n");
 			else
-				count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
+				count += sysfs_emit_at(buf, count, "\n");
 
 			if (count >= PAGE_SIZE - 1)
 				return count;

drivers/hid/hid-magicmouse.c

@@ -218,7 +218,8 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 	int pressure = 0;
 
 	if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
-	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
 		id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
 		x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
 		y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
@@ -370,7 +371,8 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 
 		if (report_undeciphered) {
 			if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
-			    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2)
+			    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+			    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC)
 				input_event(input, EV_MSC, MSC_RAW, tdata[7]);
 			else if (input->id.product !=
 					 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
@@ -497,7 +499,8 @@ static int magicmouse_raw_event(struct hid_device *hdev,
 	}
 
 	if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
-	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
 		magicmouse_emit_buttons(msc, clicks & 3);
 		input_report_rel(input, REL_X, x);
 		input_report_rel(input, REL_Y, y);
@@ -519,7 +522,8 @@ static int magicmouse_event(struct hid_device *hdev, struct hid_field *field,
 		struct hid_usage *usage, __s32 value)
 {
 	struct magicmouse_sc *msc = hid_get_drvdata(hdev);
-	if (msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 &&
+	if ((msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	     msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) &&
 	    field->report->id == MOUSE2_REPORT_ID) {
 		/*
 		 * magic_mouse_raw_event has done all the work. Skip hidinput.
@@ -540,7 +544,8 @@ static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hd
 	__set_bit(EV_KEY, input->evbit);
 
 	if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
-	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
 		__set_bit(BTN_LEFT, input->keybit);
 		__set_bit(BTN_RIGHT, input->keybit);
 		if (emulate_3button)
@@ -625,7 +630,8 @@ static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hd
 	 * inverse of the reported Y.
 	 */
 	if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
-	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	    input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
 		input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
 		input_set_abs_params(input, ABS_MT_POSITION_X,
 				     MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
@@ -741,19 +747,25 @@ static int magicmouse_enable_multitouch(struct hid_device *hdev)
 	int ret;
 	int feature_size;
 
-	if (hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
-	    hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
-		if (hdev->vendor == BT_VENDOR_ID_APPLE) {
+	switch (hdev->product) {
+	case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2:
+	case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC:
+		switch (hdev->vendor) {
+		case BT_VENDOR_ID_APPLE:
 			feature_size = sizeof(feature_mt_trackpad2_bt);
 			feature = feature_mt_trackpad2_bt;
-		} else { /* USB_VENDOR_ID_APPLE */
+			break;
+		default: /* USB_VENDOR_ID_APPLE */
 			feature_size = sizeof(feature_mt_trackpad2_usb);
 			feature = feature_mt_trackpad2_usb;
 		}
-	} else if (hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
+		break;
+	case USB_DEVICE_ID_APPLE_MAGICMOUSE2:
+	case USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC:
 		feature_size = sizeof(feature_mt_mouse2);
 		feature = feature_mt_mouse2;
-	} else {
+		break;
+	default:
 		feature_size = sizeof(feature_mt);
 		feature = feature_mt;
 	}
@@ -787,6 +799,7 @@ static int magicmouse_fetch_battery(struct hid_device *hdev)
 
 	if (!hdev->battery || hdev->vendor != USB_VENDOR_ID_APPLE ||
 	    (hdev->product != USB_DEVICE_ID_APPLE_MAGICMOUSE2 &&
+	     hdev->product != USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC &&
 	     hdev->product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
 	     hdev->product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC))
 		return -1;
@@ -857,6 +870,7 @@ static int magicmouse_probe(struct hid_device *hdev,
 
 	if (id->vendor == USB_VENDOR_ID_APPLE &&
 	    (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	     id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC ||
 	     ((id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
 	       id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) &&
 	      hdev->type != HID_TYPE_USBMOUSE)))
@@ -868,21 +882,27 @@ static int magicmouse_probe(struct hid_device *hdev,
 		goto err_stop_hw;
 	}
 
-	if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
-		report = hid_register_report(hdev, HID_INPUT_REPORT,
-			MOUSE_REPORT_ID, 0);
-	else if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2)
-		report = hid_register_report(hdev, HID_INPUT_REPORT,
-			MOUSE2_REPORT_ID, 0);
-	else if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
-		 id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
-		if (id->vendor == BT_VENDOR_ID_APPLE)
+	switch (id->product) {
+	case USB_DEVICE_ID_APPLE_MAGICMOUSE:
+		report = hid_register_report(hdev, HID_INPUT_REPORT, MOUSE_REPORT_ID, 0);
+		break;
+	case USB_DEVICE_ID_APPLE_MAGICMOUSE2:
+	case USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC:
+		report = hid_register_report(hdev, HID_INPUT_REPORT, MOUSE2_REPORT_ID, 0);
+		break;
+	case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2:
+	case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC:
+		switch (id->vendor) {
+		case BT_VENDOR_ID_APPLE:
 			report = hid_register_report(hdev, HID_INPUT_REPORT,
 				TRACKPAD2_BT_REPORT_ID, 0);
-		else /* USB_VENDOR_ID_APPLE */
+			break;
+		default:
 			report = hid_register_report(hdev, HID_INPUT_REPORT,
 				TRACKPAD2_USB_REPORT_ID, 0);
-	} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
+		}
+		break;
+	default: /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 		report = hid_register_report(hdev, HID_INPUT_REPORT,
 			TRACKPAD_REPORT_ID, 0);
 		report = hid_register_report(hdev, HID_INPUT_REPORT,
@@ -909,7 +929,8 @@ static int magicmouse_probe(struct hid_device *hdev,
 		hid_err(hdev, "unable to request touch data (%d)\n", ret);
 		goto err_stop_hw;
 	}
-	if (ret == -EIO && id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
+	if (ret == -EIO && (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+			    id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC)) {
 		schedule_delayed_work(&msc->work, msecs_to_jiffies(500));
 	}
 
@@ -945,6 +966,7 @@ static const __u8 *magicmouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 	 */
 	if (hdev->vendor == USB_VENDOR_ID_APPLE &&
 	    (hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
+	     hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC ||
 	     hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
 	     hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) &&
 	    *rsize == 83 && rdesc[46] == 0x84 && rdesc[58] == 0x85) {
@@ -971,6 +993,10 @@ static const struct hid_device_id magic_mice[] = {
 		USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
 		USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
+	{ HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
+		USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC), .driver_data = 0 },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
+		USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC), .driver_data = 0 },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 		USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
 	{ HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,

drivers/hid/hid-mcp2200.c

@@ -127,8 +127,8 @@ static int mcp_cmd_read_all(struct mcp2200 *mcp)
 	return mcp->status;
 }
 
-static void mcp_set_multiple(struct gpio_chip *gc, unsigned long *mask,
-			     unsigned long *bits)
+static int mcp_set_multiple(struct gpio_chip *gc, unsigned long *mask,
+			    unsigned long *bits)
 {
 	struct mcp2200 *mcp = gpiochip_get_data(gc);
 	u8 value;
@@ -150,16 +150,20 @@ static void mcp_set_multiple(struct gpio_chip *gc, unsigned long *mask,
 
 	if (status == sizeof(struct mcp_set_clear_outputs))
 		mcp->gpio_val = value;
+	else
+		status = -EIO;
 
 	mutex_unlock(&mcp->lock);
+
+	return status;
 }
 
-static void mcp_set(struct gpio_chip *gc, unsigned int gpio_nr, int value)
+static int mcp_set(struct gpio_chip *gc, unsigned int gpio_nr, int value)
 {
 	unsigned long mask = 1 << gpio_nr;
 	unsigned long bmap_value = value << gpio_nr;
 
-	mcp_set_multiple(gc, &mask, &bmap_value);
+	return mcp_set_multiple(gc, &mask, &bmap_value);
 }
 
 static int mcp_get_multiple(struct gpio_chip *gc, unsigned long *mask,
@@ -263,9 +267,10 @@ static int mcp_direction_output(struct gpio_chip *gc, unsigned int gpio_nr,
 	bmap_value = value << gpio_nr;
 
 	ret = mcp_set_direction(gc, gpio_nr, MCP2200_DIR_OUT);
-	if (!ret)
-		mcp_set_multiple(gc, &mask, &bmap_value);
-	return ret;
+	if (ret)
+		return ret;
+
+	return mcp_set_multiple(gc, &mask, &bmap_value);
 }
 
 static const struct gpio_chip template_chip = {
@@ -274,8 +279,8 @@ static const struct gpio_chip template_chip = {
 	.get_direction		= mcp_get_direction,
 	.direction_input	= mcp_direction_input,
 	.direction_output	= mcp_direction_output,
-	.set			= mcp_set,
-	.set_multiple		= mcp_set_multiple,
+	.set_rv			= mcp_set,
+	.set_multiple_rv	= mcp_set_multiple,
 	.get			= mcp_get,
 	.get_multiple		= mcp_get_multiple,
 	.base			= -1,

drivers/hid/hid-mcp2221.c

@@ -624,10 +624,10 @@ static int mcp_gpio_get(struct gpio_chip *gc,
 	return ret;
 }
 
-static void mcp_gpio_set(struct gpio_chip *gc,
-				unsigned int offset, int value)
+static int mcp_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
 {
 	struct mcp2221 *mcp = gpiochip_get_data(gc);
+	int ret;
 
 	memset(mcp->txbuf, 0, 18);
 	mcp->txbuf[0] = MCP2221_GPIO_SET;
@@ -638,8 +638,10 @@ static void mcp_gpio_set(struct gpio_chip *gc,
 	mcp->txbuf[mcp->gp_idx] = !!value;
 
 	mutex_lock(&mcp->lock);
-	mcp_send_data_req_status(mcp, mcp->txbuf, 18);
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 18);
 	mutex_unlock(&mcp->lock);
+
+	return ret;
 }
 
 static int mcp_gpio_dir_set(struct mcp2221 *mcp,
@@ -1206,7 +1208,7 @@ static int mcp2221_probe(struct hid_device *hdev,
 	mcp->gc->direction_input = mcp_gpio_direction_input;
 	mcp->gc->direction_output = mcp_gpio_direction_output;
 	mcp->gc->get_direction = mcp_gpio_get_direction;
-	mcp->gc->set = mcp_gpio_set;
+	mcp->gc->set_rv = mcp_gpio_set;
 	mcp->gc->get = mcp_gpio_get;
 	mcp->gc->ngpio = MCP_NGPIO;
 	mcp->gc->base = -1;

drivers/hid/hid-multitouch.c

@@ -1887,6 +1887,16 @@ static void mt_remove(struct hid_device *hdev)
 	hid_hw_stop(hdev);
 }
 
+static void mt_on_hid_hw_open(struct hid_device *hdev)
+{
+	mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
+}
+
+static void mt_on_hid_hw_close(struct hid_device *hdev)
+{
+	mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
+}
+
 /*
  * This list contains only:
  * - VID/PID of products not working with the default multitouch handling
@@ -2354,5 +2364,7 @@ static struct hid_driver mt_driver = {
 	.suspend = pm_ptr(mt_suspend),
 	.reset_resume = pm_ptr(mt_reset_resume),
 	.resume = pm_ptr(mt_resume),
+	.on_hid_hw_open = mt_on_hid_hw_open,
+	.on_hid_hw_close = mt_on_hid_hw_close,
 };
 module_hid_driver(mt_driver);

drivers/hid/hid-quirks.c

@@ -1063,7 +1063,7 @@ bool hid_ignore(struct hid_device *hdev)
 	}
 
 	if (hdev->type == HID_TYPE_USBMOUSE &&
-	    hid_match_id(hdev, hid_mouse_ignore_list))
+	    hdev->quirks & HID_QUIRK_IGNORE_MOUSE)
 		return true;
 
 	return !!hid_match_id(hdev, hid_ignore_list);
@@ -1267,6 +1267,9 @@ static unsigned long hid_gets_squirk(const struct hid_device *hdev)
 	if (hid_match_id(hdev, hid_ignore_list))
 		quirks |= HID_QUIRK_IGNORE;
 
+	if (hid_match_id(hdev, hid_mouse_ignore_list))
+		quirks |= HID_QUIRK_IGNORE_MOUSE;
+
 	if (hid_match_id(hdev, hid_have_special_driver))
 		quirks |= HID_QUIRK_HAVE_SPECIAL_DRIVER;
 

drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c

@@ -82,15 +82,10 @@ static int quicki2c_acpi_get_dsd_property(struct acpi_device *adev, acpi_string
 {
 	acpi_handle handle = acpi_device_handle(adev);
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-	union acpi_object obj = { .type = type };
-	struct acpi_object_list arg_list = {
-		.count = 1,
-		.pointer = &obj,
-	};
 	union acpi_object *ret_obj;
 	acpi_status status;
 
-	status = acpi_evaluate_object(handle, dsd_method_name, &arg_list, &buffer);
+	status = acpi_evaluate_object(handle, dsd_method_name, NULL, &buffer);
 	if (ACPI_FAILURE(status)) {
 		acpi_handle_err(handle,
 				"Can't evaluate %s method: %d\n", dsd_method_name, status);

drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.c

@@ -1121,7 +1121,7 @@ EXPORT_SYMBOL_NS_GPL(thc_port_select, "INTEL_THC");
 
 static u8 thc_get_spi_freq_div_val(struct thc_device *dev, u32 spi_freq_val)
 {
-	int frequency[] = {
+	static const int frequency[] = {
 		THC_SPI_FREQUENCY_7M,
 		THC_SPI_FREQUENCY_15M,
 		THC_SPI_FREQUENCY_17M,
@@ -1130,7 +1130,7 @@ static u8 thc_get_spi_freq_div_val(struct thc_device *dev, u32 spi_freq_val)
 		THC_SPI_FREQUENCY_31M,
 		THC_SPI_FREQUENCY_41M,
 	};
-	u8 frequency_div[] = {
+	static const u8 frequency_div[] = {
 		THC_SPI_FRQ_DIV_2,
 		THC_SPI_FRQ_DIV_1,
 		THC_SPI_FRQ_DIV_7,

drivers/hid/usbhid/hid-core.c

@@ -984,12 +984,11 @@ static int usbhid_parse(struct hid_device *hid)
 	struct usb_host_interface *interface = intf->cur_altsetting;
 	struct usb_device *dev = interface_to_usbdev (intf);
 	struct hid_descriptor *hdesc;
+	struct hid_class_descriptor *hcdesc;
 	u32 quirks = 0;
 	unsigned int rsize = 0;
 	char *rdesc;
-	int ret, n;
-	int num_descriptors;
-	size_t offset = offsetof(struct hid_descriptor, desc);
+	int ret;
 
 	quirks = hid_lookup_quirk(hid);
 
@@ -1011,20 +1010,19 @@ static int usbhid_parse(struct hid_device *hid)
 		return -ENODEV;
 	}
 
-	if (hdesc->bLength < sizeof(struct hid_descriptor)) {
-		dbg_hid("hid descriptor is too short\n");
+	if (!hdesc->bNumDescriptors ||
+	    hdesc->bLength != sizeof(*hdesc) +
+			      (hdesc->bNumDescriptors - 1) * sizeof(*hcdesc)) {
+		dbg_hid("hid descriptor invalid, bLen=%hhu bNum=%hhu\n",
+			hdesc->bLength, hdesc->bNumDescriptors);
 		return -EINVAL;
 	}
 
 	hid->version = le16_to_cpu(hdesc->bcdHID);
 	hid->country = hdesc->bCountryCode;
 
-	num_descriptors = min_t(int, hdesc->bNumDescriptors,
-	       (hdesc->bLength - offset) / sizeof(struct hid_class_descriptor));
-
-	for (n = 0; n < num_descriptors; n++)
-		if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
-			rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
+	if (hdesc->rpt_desc.bDescriptorType == HID_DT_REPORT)
+		rsize = le16_to_cpu(hdesc->rpt_desc.wDescriptorLength);
 
 	if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 		dbg_hid("weird size of report descriptor (%u)\n", rsize);
@@ -1052,6 +1050,11 @@ static int usbhid_parse(struct hid_device *hid)
 		goto err;
 	}
 
+	if (hdesc->bNumDescriptors > 1)
+		hid_warn(intf,
+			"%u unsupported optional hid class descriptors\n",
+			(int)(hdesc->bNumDescriptors - 1));
+
 	hid->quirks |= quirks;
 
 	return 0;

drivers/usb/gadget/function/f_hid.c

@@ -144,8 +144,8 @@ static struct hid_descriptor hidg_desc = {
 	.bcdHID				= cpu_to_le16(0x0101),
 	.bCountryCode			= 0x00,
 	.bNumDescriptors		= 0x1,
-	/*.desc[0].bDescriptorType	= DYNAMIC */
-	/*.desc[0].wDescriptorLenght	= DYNAMIC */
+	/*.rpt_desc.bDescriptorType	= DYNAMIC */
+	/*.rpt_desc.wDescriptorLength	= DYNAMIC */
 };
 
 /* Super-Speed Support */
@@ -939,8 +939,8 @@ static int hidg_setup(struct usb_function *f,
 			struct hid_descriptor hidg_desc_copy = hidg_desc;
 
 			VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: HID\n");
-			hidg_desc_copy.desc[0].bDescriptorType = HID_DT_REPORT;
-			hidg_desc_copy.desc[0].wDescriptorLength =
+			hidg_desc_copy.rpt_desc.bDescriptorType = HID_DT_REPORT;
+			hidg_desc_copy.rpt_desc.wDescriptorLength =
 				cpu_to_le16(hidg->report_desc_length);
 
 			length = min_t(unsigned short, length,
@@ -1210,8 +1210,8 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 	 * We can use hidg_desc struct here but we should not relay
 	 * that its content won't change after returning from this function.
 	 */
-	hidg_desc.desc[0].bDescriptorType = HID_DT_REPORT;
-	hidg_desc.desc[0].wDescriptorLength =
+	hidg_desc.rpt_desc.bDescriptorType = HID_DT_REPORT;
+	hidg_desc.rpt_desc.wDescriptorLength =
 		cpu_to_le16(hidg->report_desc_length);
 
 	hidg_hs_in_ep_desc.bEndpointAddress =

include/linux/hid.h

@@ -357,6 +357,7 @@ struct hid_item {
  * | @HID_QUIRK_INPUT_PER_APP:
  * | @HID_QUIRK_X_INVERT:
  * | @HID_QUIRK_Y_INVERT:
+ * | @HID_QUIRK_IGNORE_MOUSE:
  * | @HID_QUIRK_SKIP_OUTPUT_REPORTS:
  * | @HID_QUIRK_SKIP_OUTPUT_REPORT_ID:
  * | @HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP:
@@ -382,6 +383,7 @@ struct hid_item {
 #define HID_QUIRK_INPUT_PER_APP			BIT(11)
 #define HID_QUIRK_X_INVERT			BIT(12)
 #define HID_QUIRK_Y_INVERT			BIT(13)
+#define HID_QUIRK_IGNORE_MOUSE			BIT(14)
 #define HID_QUIRK_SKIP_OUTPUT_REPORTS		BIT(16)
 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID		BIT(17)
 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP	BIT(18)
@@ -740,8 +742,9 @@ struct hid_descriptor {
 	__le16 bcdHID;
 	__u8  bCountryCode;
 	__u8  bNumDescriptors;
+	struct hid_class_descriptor rpt_desc;
 
-	struct hid_class_descriptor desc[1];
+	struct hid_class_descriptor opt_descs[];
 } __attribute__ ((packed));
 
 #define HID_DEVICE(b, g, ven, prod)					\
@@ -792,6 +795,8 @@ struct hid_usage_id {
  * @suspend: invoked on suspend (NULL means nop)
  * @resume: invoked on resume if device was not reset (NULL means nop)
  * @reset_resume: invoked on resume if device was reset (NULL means nop)
+ * @on_hid_hw_open: invoked when hid core opens first instance (NULL means nop)
+ * @on_hid_hw_close: invoked when hid core closes last instance (NULL means nop)
  *
  * probe should return -errno on error, or 0 on success. During probe,
  * input will not be passed to raw_event unless hid_device_io_start is
@@ -847,6 +852,8 @@ struct hid_driver {
 	int (*suspend)(struct hid_device *hdev, pm_message_t message);
 	int (*resume)(struct hid_device *hdev);
 	int (*reset_resume)(struct hid_device *hdev);
+	void (*on_hid_hw_open)(struct hid_device *hdev);
+	void (*on_hid_hw_close)(struct hid_device *hdev);
 
 /* private: */
 	struct device_driver driver;