[PATCH v1 2/5] thermal: rockchip: fix a impossible condition caused by the warning

Caesar Wang wxt at rock-chips.com
Thu Nov 26 18:52:23 PST 2015


As the Dan report the smatch check the thermal driver warning:
drivers/thermal/rockchip_thermal.c:551 rockchip_configure_from_dt()
warn: impossible condition '(thermal->tshut_temp > ((~0 >> 1))) =>
(s32min-s32max > s32max)'

Since the Temperature is currently represented as int not long in
the thermal driver.

Fixes: commit 437df2172e8d
("thermal: rockchip: consistently use int for temperatures")

Reported-by: Dan Carpenter <dan.carpenter at oracle.com>
Signed-off-by: Caesar Wang <wxt at rock-chips.com>

---

Changes in v1: None

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

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index 5a8840b..d00765f 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -548,7 +548,7 @@ static int rockchip_configure_from_dt(struct device *dev,
 		thermal->tshut_temp = shut_temp;
 	}
 
-	if (thermal->tshut_temp > INT_MAX) {
+	if (!(thermal->tshut_temp < INT_MAX)) {
 		dev_err(dev, "Invalid tshut temperature specified: %d\n",
 			thermal->tshut_temp);
 		return -ERANGE;
-- 
1.9.1




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