linux-kernel - [PATCH 4.1 65/65] Input: pixcir_i2c_ts

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Message-Id: <20150719190811.600783572@linuxfoundation.org>
Date:	Sun, 19 Jul 2015 12:08:24 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Frodo Lai <frodo_lai@...com.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: [PATCH 4.1 65/65] Input: pixcir_i2c_ts - fix receive error

4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Frodo Lai <frodo.lai@...il.com>

commit 469d7d22cea146e40efe8c330e5164b4d8f13934 upstream.

The i2c_master_recv() uses readsize to receive data from i2c but compares
to size of rdbuf which is always 27. This would cause problem when the
max_fingers is not 5. Change the comparison value to readsize instead.

Fixes: 36874c7e219 ("Input: pixcir_i2c_ts - support up to 5 fingers and
hardware tracking IDs:)

Signed-off-by: Frodo Lai <frodo_lai@...com.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/input/touchscreen/pixcir_i2c_ts.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/input/touchscreen/pixcir_i2c_ts.c
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.c
@@ -78,7 +78,7 @@ static void pixcir_ts_parse(struct pixci
 	}
 
 	ret = i2c_master_recv(tsdata->client, rdbuf, readsize);
-	if (ret != sizeof(rdbuf)) {
+	if (ret != readsize) {
 		dev_err(&tsdata->client->dev,
 			"%s: i2c_master_recv failed(), ret=%d\n",
 			__func__, ret);


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