linux-kernel - [PATCH 08/22 v4] Input: atmel_mxt_ts - print less overhead when dumping objects

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Date:	Mon, 18 Jun 2012 12:08:28 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Nick Dyer <nick.dyer@...ev.co.uk>, linux-input@...r.kernel.org
Cc:	Iiro Valkonen <iiro.valkonen@...el.com>,
	Benson Leung <bleung@...omium.org>,
	Yufeng Shen <miletus@...omium.org>,
	Olof Johansson <olofj@...omium.org>,
	linux-kernel@...r.kernel.org, Daniel Kurtz <djkurtz@...omium.org>
Subject: [PATCH 08/22 v4] Input: atmel_mxt_ts - print less overhead when dumping objects

Conserve limited (PAGE_SIZE) sysfs output buffer space by only showing
readable objects and not printing the object's index, which is not useful
to userspace.

Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |   12 ++++--------
 1 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 8c99d6d..65fd89b 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -896,15 +896,11 @@ static ssize_t mxt_object_show(struct device *dev,
 	for (i = 0; i < data->info.object_num; i++) {
 		object = data->object_table + i;
 
-		count += scnprintf(buf + count, PAGE_SIZE - count,
-				"Object[%d] (Type %d)\n",
-				i + 1, object->type);
-
-		if (!mxt_object_readable(object->type)) {
-			count += scnprintf(buf + count, PAGE_SIZE - count,
-					"\n");
+		if (!mxt_object_readable(object->type))
 			continue;
-		}
+
+		count += scnprintf(buf + count, PAGE_SIZE - count,
+				"T%u:\n", object->type);
 
 		error = __mxt_read_reg(data->client, object->start_address,
 				object->size + 1, obuf);
-- 
1.7.7.3

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