Writes into limit attributes can overflow due to additions and
multiplications with unchecked parameters.
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
drivers/hwmon/gl518sm.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/hwmon/gl518sm.c b/drivers/hwmon/gl518sm.c
index 0212c8317bca..0a11a550c2a2 100644
--- a/drivers/hwmon/gl518sm.c
+++ b/drivers/hwmon/gl518sm.c
@@ -86,9 +86,8 @@ enum chips { gl518sm_r00, gl518sm_r80 };
#define BOOL_FROM_REG(val) ((val) ? 0 : 1)
#define BOOL_TO_REG(val) ((val) ? 0 : 1)
-#define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
- (val) - 500 : \
- (val) + 500) / 1000) + 119), 0, 255)
+#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val(val, -119000, 136000), \
+ 1000) + 119)
#define TEMP_FROM_REG(val) (((val) - 119) * 1000)
static inline u8 FAN_TO_REG(long rpm, int div)
@@ -101,10 +100,11 @@ static inline u8 FAN_TO_REG(long rpm, int div)
}
#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div))))
-#define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255)
+#define IN_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val(val, 0, 255 * 19), 19)
#define IN_FROM_REG(val) ((val) * 19)
-#define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0,
255)
+#define VDD_TO_REG(val) \
+ DIV_ROUND_CLOSEST(clamp_val(val, 0, 255 * 95 / 4) * 4, 95)
#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
#define DIV_FROM_REG(val) (1 << (val))
--
2.5.0
--
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