linux-kernel - [30/53] hwmon: (jz4740) fix signedness bug

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Message-Id: <20111216194558.912910799@clark.kroah.org>
Date:	Fri, 16 Dec 2011 11:45:27 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Axel Lin <axel.lin@...il.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Guenter Roeck <guenter.roeck@...csson.com>
Subject: [30/53] hwmon: (jz4740) fix signedness bug

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

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

From: Axel Lin <axel.lin@...il.com>

commit 0b57d7602b68f7b2786b2f0e22da39cbd4139a95 upstream.

wait_for_completion_interruptible_timeout() may return negative value.
In this case, checking if (t > 0)  will return true if t is unsigned.

Signed-off-by: Axel Lin <axel.lin@...il.com>
Acked-by: Lars-Peter Clausen <lars@...afoo.de>
Signed-off-by: Guenter Roeck <guenter.roeck@...csson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/hwmon/jz4740-hwmon.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/jz4740-hwmon.c
+++ b/drivers/hwmon/jz4740-hwmon.c
@@ -59,7 +59,7 @@ static ssize_t jz4740_hwmon_read_adcin(s
 {
 	struct jz4740_hwmon *hwmon = dev_get_drvdata(dev);
 	struct completion *completion = &hwmon->read_completion;
-	unsigned long t;
+	long t;
 	unsigned long val;
 	int ret;
 


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