linux-kernel - [PATCH 1/4] HID: logitech-hidpp: do not return the name length

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Message-Id: <1418302280-14794-2-git-send-email-peter@lekensteyn.nl>
Date:	Thu, 11 Dec 2014 13:51:17 +0100
From:	Peter Wu <peter@...ensteyn.nl>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Nestor Lopez Casado <nlopezcasad@...itech.com>
Cc:	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] HID: logitech-hidpp: do not return the name length

We do not make any use of the actual name length get through
hidpp_get_device_name(). Original patch by Benjamin Tissoires, this
patch also replaces a (now) unnecessary goto by return NULL.

Signed-off-by: Peter Wu <peter@...ensteyn.nl>
---
 drivers/hid/hid-logitech-hidpp.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 1a6395d..5066df8 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -461,7 +461,7 @@ static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
 	return count;
 }
 
-static char *hidpp_get_device_name(struct hidpp_device *hidpp, u8 *name_length)
+static char *hidpp_get_device_name(struct hidpp_device *hidpp)
 {
 	u8 feature_type;
 	u8 feature_index;
@@ -473,28 +473,23 @@ static char *hidpp_get_device_name(struct hidpp_device *hidpp, u8 *name_length)
 	ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_GET_DEVICE_NAME_TYPE,
 		&feature_index, &feature_type);
 	if (ret)
-		goto out_err;
+		return NULL;
 
 	ret = hidpp_devicenametype_get_count(hidpp, feature_index,
 		&__name_length);
 	if (ret)
-		goto out_err;
+		return NULL;
 
 	name = kzalloc(__name_length + 1, GFP_KERNEL);
 	if (!name)
-		goto out_err;
+		return NULL;
 
-	*name_length = __name_length + 1;
 	while (index < __name_length)
 		index += hidpp_devicenametype_get_device_name(hidpp,
 			feature_index, index, name + index,
 			__name_length - index);
 
 	return name;
-
-out_err:
-	*name_length = 0;
-	return NULL;
 }
 
 /* -------------------------------------------------------------------------- */
@@ -989,7 +984,6 @@ static void hidpp_overwrite_name(struct hid_device *hdev, bool use_unifying)
 {
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 	char *name;
-	u8 name_length;
 
 	if (use_unifying)
 		/*
@@ -999,7 +993,7 @@ static void hidpp_overwrite_name(struct hid_device *hdev, bool use_unifying)
 		 */
 		name = hidpp_get_unifying_name(hidpp);
 	else
-		name = hidpp_get_device_name(hidpp, &name_length);
+		name = hidpp_get_device_name(hidpp);
 
 	if (!name)
 		hid_err(hdev, "unable to retrieve the name of the device");
@@ -1053,7 +1047,6 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
 	bool connected = atomic_read(&hidpp->connected);
 	struct input_dev *input;
 	char *name, *devm_name;
-	u8 name_length;
 
 	if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
 		wtp_connect(hdev, connected);
@@ -1080,7 +1073,7 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
 		return;
 	}
 
-	name = hidpp_get_device_name(hidpp, &name_length);
+	name = hidpp_get_device_name(hidpp);
 	if (!name) {
 		hid_err(hdev, "unable to retrieve the name of the device");
 	} else {
-- 
2.1.3

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