hwmon: (jz4740) fix signedness bug

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@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/hwmon/jz4740-hwmon.c b/drivers/hwmon/jz4740-hwmon.c
index fea292d43407cecba6e75b70021617f871d6b1b8..b65a4dae3f5e8ba7472c0743168853067f2ae597 100644 (file)
--- a/drivers/hwmon/jz4740-hwmon.c
+++ b/drivers/hwmon/jz4740-hwmon.c
@@ -59,7 +59,7 @@ static ssize_t jz4740_hwmon_read_adcin(struct device *dev,
 {
        struct jz4740_hwmon *hwmon = dev_get_drvdata(dev);
        struct completion *completion = &hwmon->read_completion;
-       unsigned long t;
+       long t;
        unsigned long val;
        int ret;