6 files changed, 19 insertions, 24 deletions

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 41f167e4d75f..7ce93d927f62 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -164,6 +164,7 @@
 #define USB_DEVICE_ID_ATEN_2PORTKVM     0x2204
 #define USB_DEVICE_ID_ATEN_4PORTKVM     0x2205
 #define USB_DEVICE_ID_ATEN_4PORTKVMC    0x2208
+#define USB_DEVICE_ID_ATEN_CS682        0x2213
 
 #define USB_VENDOR_ID_ATMEL             0x03eb
 #define USB_DEVICE_ID_ATMEL_MULTITOUCH  0x211c
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index b3cf6fd4be96..5fd530acf747 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -44,7 +44,6 @@ MODULE_PARM_DESC(disable_raw_mode,
 /* bits 1..20 are reserved for classes */
 #define HIDPP_QUIRK_DELAYED_INIT                BIT(21)
 #define HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS        BIT(22)
-#define HIDPP_QUIRK_MULTI_INPUT                 BIT(23)
 
 /*
  * There are two hidpp protocols in use, the first version hidpp10 is known
@@ -706,12 +705,6 @@ static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
                 struct hid_field *field, struct hid_usage *usage,
                 unsigned long **bit, int *max)
 {
-        struct hidpp_device *hidpp = hid_get_drvdata(hdev);
-
-        if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) &&
-            (field->application == HID_GD_KEYBOARD))
-                return 0;
-
         return -1;
 }
 
@@ -720,10 +713,6 @@ static void wtp_populate_input(struct hidpp_device *hidpp,
 {
         struct wtp_data *wd = hidpp->private_data;
 
-        if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) && origin_is_hid_core)
-                /* this is the generic hid-input call */
-                return;
-
         __set_bit(EV_ABS, input_dev->evbit);
         __set_bit(EV_KEY, input_dev->evbit);
         __clear_bit(EV_REL, input_dev->evbit);
@@ -1245,10 +1234,6 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
         if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT)
                 connect_mask &= ~HID_CONNECT_HIDINPUT;
 
-        /* Re-enable hidinput for multi-input devices */
-        if (hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT)
-                connect_mask |= HID_CONNECT_HIDINPUT;
-
         ret = hid_hw_start(hdev, connect_mask);
         if (ret) {
                 hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
@@ -1296,11 +1281,6 @@ static const struct hid_device_id hidpp_devices[] = {
           HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
                 USB_DEVICE_ID_LOGITECH_T651),
           .driver_data = HIDPP_QUIRK_CLASS_WTP },
-        { /* Keyboard TK820 */
-          HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
-                USB_VENDOR_ID_LOGITECH, 0x4102),
-          .driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_MULTI_INPUT |
-                         HIDPP_QUIRK_CLASS_WTP },
 
         { HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
                 USB_VENDOR_ID_LOGITECH, HID_ANY_ID)},
diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index c3f6f1e311ea..090a1ba0abb6 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -294,7 +294,7 @@ int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
         if (!report)
                 return -EINVAL;
 
-        mutex_lock(&hsdev->mutex);
+        mutex_lock(hsdev->mutex_ptr);
         if (flag == SENSOR_HUB_SYNC) {
                 memset(&hsdev->pending, 0, sizeof(hsdev->pending));
                 init_completion(&hsdev->pending.ready);
@@ -328,7 +328,7 @@ int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
                 kfree(hsdev->pending.raw_data);
                 hsdev->pending.status = false;
         }
-        mutex_unlock(&hsdev->mutex);
+        mutex_unlock(hsdev->mutex_ptr);
 
         return ret_val;
 }
@@ -667,7 +667,14 @@ static int sensor_hub_probe(struct hid_device *hdev,
                         hsdev->vendor_id = hdev->vendor;
                         hsdev->product_id = hdev->product;
                         hsdev->usage = collection->usage;
-                        mutex_init(&hsdev->mutex);
+                        hsdev->mutex_ptr = devm_kzalloc(&hdev->dev,
+                                                        sizeof(struct mutex),
+                                                        GFP_KERNEL);
+                        if (!hsdev->mutex_ptr) {
+                                ret = -ENOMEM;
+                                goto err_stop_hw;
+                        }
+                        mutex_init(hsdev->mutex_ptr);
                         hsdev->start_collection_index = i;
                         if (last_hsdev)
                                 last_hsdev->end_collection_index = i;
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index ab4dd952b6ba..92d6cdf02460 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -862,6 +862,7 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client,
         union acpi_object *obj;
         struct acpi_device *adev;
         acpi_handle handle;
+        int ret;
 
         handle = ACPI_HANDLE(&client->dev);
         if (!handle || acpi_bus_get_device(handle, &adev))
@@ -877,7 +878,9 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client,
         pdata->hid_descriptor_address = obj->integer.value;
         ACPI_FREE(obj);
 
-        return acpi_dev_add_driver_gpios(adev, i2c_hid_acpi_gpios);
+        /* GPIOs are optional */
+        ret = acpi_dev_add_driver_gpios(adev, i2c_hid_acpi_gpios);
+        return ret < 0 && ret != -ENXIO ? ret : 0;
 }
 
 static const struct acpi_device_id i2c_hid_acpi_match[] = {
diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
index a775143e6265..4696895eb708 100644
--- a/drivers/hid/usbhid/hid-quirks.c
+++ b/drivers/hid/usbhid/hid-quirks.c
@@ -61,6 +61,7 @@ static const struct hid_blacklist {
         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_2PORTKVM, HID_QUIRK_NOGET },
         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVM, HID_QUIRK_NOGET },
         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET },
+        { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS682, HID_QUIRK_NOGET },
         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FIGHTERSTICK, HID_QUIRK_NOGET },
         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_COMBATSTICK, HID_QUIRK_NOGET },
         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FLIGHT_SIM_ECLIPSE_YOKE, HID_QUIRK_NOGET },
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index fa54d3290659..adf959dcfa5d 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -1072,6 +1072,9 @@ static int wacom_wac_finger_count_touches(struct wacom_wac *wacom)
         int count = 0;
         int i;
 
+        if (!touch_max)
+                return 0;
+
         /* non-HID_GENERIC single touch input doesn't call this routine */
         if ((touch_max == 1) && (wacom->features.type == HID_GENERIC))
                 return wacom->hid_data.tipswitch &&