linux-kernel - [PATCH] drivers: input: touchscreen: sur40: use static variable instead of stack varialbe for 'packet

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Date:	Wed, 27 Nov 2013 10:15:33 +0800
From:	Chen Gang <gang.chen.5i5j@...il.com>
To:	dmitry.torokhov@...il.com, floe@...terbrot.org,
	rydberg@...omail.se, David Herrmann <dh.herrmann@...il.com>
CC:	rkuo <rkuo@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org
Subject: [PATCH] drivers: input: touchscreen: sur40: use static variable instead
 of stack varialbe for 'packet_id'

'packet_id' is used for checking sequence whether in order, it need be
static variable independent from sur40_poll().

The related warning (with allmodconfig under hexagon):

  drivers/input/touchscreen/sur40.c: In function 'sur40_poll':
  drivers/input/touchscreen/sur40.c:297:6: warning: 'packet_id' may be used uninitialized in this function [-Wuninitialized]


Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
---
 drivers/input/touchscreen/sur40.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index cfd1b7e..5dfd01a 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -251,7 +251,7 @@ static void sur40_poll(struct input_polled_dev *polldev)
 	struct sur40_state *sur40 = polldev->private;
 	struct input_dev *input = polldev->input;
 	int result, bulk_read, need_blobs, packet_blobs, i;
-	u32 packet_id;
+	static u32 packet_id;
 
 	struct sur40_header *header = &sur40->bulk_in_buffer->header;
 	struct sur40_blob *inblob = &sur40->bulk_in_buffer->blobs[0];
-- 
1.7.7.6
--
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