1 files changed, 22 insertions, 6 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 4741ff626771..b31b8a2fd540 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1883,9 +1883,12 @@ u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags)
 	/*
 	 * 7 extra bytes are necessary to achieve proper functionality
 	 * of implement() working on 8 byte chunks
+	 * 1 extra byte for the report ID if it is null (not used) so
+	 * we can reserve that extra byte in the first position of the buffer
+	 * when sending it to .raw_request()
 	 */
 
-	u32 len = hid_report_len(report) + 7;
+	u32 len = hid_report_len(report) + 7 + (report->id == 0);
 
 	return kzalloc(len, flags);
 }
@@ -1973,7 +1976,7 @@ static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
 int __hid_request(struct hid_device *hid, struct hid_report *report,
 		enum hid_class_request reqtype)
 {
-	char *buf;
+	char *buf, *data_buf;
 	int ret;
 	u32 len;
 
@@ -1981,13 +1984,19 @@ int __hid_request(struct hid_device *hid, struct hid_report *report,
 	if (!buf)
 		return -ENOMEM;
 
+	data_buf = buf;
 	len = hid_report_len(report);
 
+	if (report->id == 0) {
+		/* reserve the first byte for the report ID */
+		data_buf++;
+		len++;
+	}
+
 	if (reqtype == HID_REQ_SET_REPORT)
-		hid_output_report(report, buf);
+		hid_output_report(report, data_buf);
 
-	ret = hid->ll_driver->raw_request(hid, report->id, buf, len,
-					  report->type, reqtype);
+	ret = hid_hw_raw_request(hid, report->id, buf, len, report->type, reqtype);
 	if (ret < 0) {
 		dbg_hid("unable to complete request: %d\n", ret);
 		goto out;
@@ -2396,6 +2405,9 @@ 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 +2427,12 @@ 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);