[PATCH 1/3] HID: steelseries: Clean up hid send_report functions

[Benjamin Wheeler <benjaminwheeler0510@gmail.com>]

These functions do the same thing, so combine them into one with a
parameter.
Use helper functions to keep callsites the same.

Signed-off-by: Benjamin Wheeler <benjaminwheeler0510@gmail.com>
---
 drivers/hid/hid-steelseries.c | 45 ++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 24 deletions(-)

diff --git a/drivers/hid/hid-steelseries.c b/drivers/hid/hid-steelseries.c
index a0046fbc830b..63b086fa6df0 100644
--- a/drivers/hid/hid-steelseries.c
+++ b/drivers/hid/hid-steelseries.c
@@ -829,9 +829,13 @@ static int steelseries_battery_register(struct steelseries_device *sd)
 	return 0;
 }
 
-/* Helper function to send feature reports */
-static int steelseries_send_feature_report(struct hid_device *hdev,
-					   const u8 *data, size_t len)
+/**
+ * Send an hid report to the device.
+ * Supported types are output reports and feature reports.
+ */
+static int __steelseries_send_report(struct hid_device *const hdev,
+				     const u8 *const data, const size_t len,
+				     const enum hid_report_type type)
 {
 	u8 *buf;
 	int ret;
@@ -840,8 +844,9 @@ static int steelseries_send_feature_report(struct hid_device *hdev,
 	if (!buf)
 		return -ENOMEM;
 
-	ret = hid_hw_raw_request(hdev, data[0], buf, len, HID_FEATURE_REPORT,
+	ret = hid_hw_raw_request(hdev, data[0], buf, len, type,
 				 HID_REQ_SET_REPORT);
+
 	kfree(buf);
 
 	if (ret < 0)
@@ -852,28 +857,19 @@ static int steelseries_send_feature_report(struct hid_device *hdev,
 	return 0;
 }
 
-/* Helper function to send output reports */
-static int steelseries_send_output_report(struct hid_device *hdev,
-					  const u8 *data, size_t len)
+static inline int steelseries_send_feature_report(struct hid_device *const hdev,
+						  const u8 *const data,
+						  const size_t len)
 {
-	u8 *buf;
-	int ret;
-
-	buf = kmemdup(data, len, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	/* Use raw_request with OUTPUT_REPORT type for devices without Interrupt OUT */
-	ret = hid_hw_raw_request(hdev, data[0], buf, len, HID_OUTPUT_REPORT,
-				 HID_REQ_SET_REPORT);
-	kfree(buf);
-
-	if (ret < 0)
-		return ret;
-	if (ret < len)
-		return -EIO;
+	return __steelseries_send_report(hdev, data, len, HID_FEATURE_REPORT);
+}
 
-	return 0;
+static inline int steelseries_send_output_report(struct hid_device *const hdev,
+						 const u8 *const data,
+						 const size_t len)
+{
+	// NOTE: Output report (HID_OUTPUT_REPORT) is for devices without Interrupt OUT
+	return __steelseries_send_report(hdev, data, len, HID_OUTPUT_REPORT);
 }
 
 /* Sidetone level attribute */
@@ -2170,3 +2166,4 @@ MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
 MODULE_AUTHOR("Simon Wood <simon@mungewell.org>");
 MODULE_AUTHOR("Christian Mayer <git@mayer-bgk.de>");
 MODULE_AUTHOR("Sriman Achanta <srimanachanta@gmail.com>");
+MODULE_AUTHOR("Benjamin Wheeler <benjaminwheeler0510@gmail.com>");
-- 
2.52.0