From 211186cae14de09573b062e478eb9fe215aed8d9 Mon Sep 17 00:00:00 2001 From: Lei YU Date: Thu, 11 Jul 2019 10:44:48 +0800 Subject: hwmon: (occ) Fix division by zero issue The code in occ_get_powr_avg() invokes div64_u64() without checking the divisor. In case the divisor is zero, kernel gets an "Division by zero in kernel" error. Check the divisor and make it return 0 if the divisor is 0. Fixes: c10e753d43eb ("hwmon (occ): Add sensor types and versions") Signed-off-by: Lei YU Reviewed-by: Eddie James Link: https://lore.kernel.org/r/1562813088-23708-1-git-send-email-mine260309@gmail.com Signed-off-by: Guenter Roeck --- drivers/hwmon/occ/common.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c index a7d2b16dd702..30e18eb60da7 100644 --- a/drivers/hwmon/occ/common.c +++ b/drivers/hwmon/occ/common.c @@ -408,8 +408,10 @@ static ssize_t occ_show_power_1(struct device *dev, static u64 occ_get_powr_avg(u64 *accum, u32 *samples) { - return div64_u64(get_unaligned_be64(accum) * 1000000ULL, - get_unaligned_be32(samples)); + u64 divisor = get_unaligned_be32(samples); + + return (divisor == 0) ? 0 : + div64_u64(get_unaligned_be64(accum) * 1000000ULL, divisor); } static ssize_t occ_show_power_2(struct device *dev, -- cgit v1.2.3 From f3d43e2e45fd9d44ba52d20debd12cd4ee9c89bf Mon Sep 17 00:00:00 2001 From: Björn Gerhart Date: Mon, 15 Jul 2019 18:33:55 +0200 Subject: hwmon: (nct6775) Fix register address and added missed tolerance for nct6106 Fixed address of third NCT6106_REG_WEIGHT_DUTY_STEP, and added missed NCT6106_REG_TOLERANCE_H. Fixes: 6c009501ff200 ("hwmon: (nct6775) Add support for NCT6102D/6106D") Signed-off-by: Bjoern Gerhart Signed-off-by: Guenter Roeck --- drivers/hwmon/nct6775.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index e7dff5febe16..d42bc0883a32 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -852,7 +852,7 @@ static const u16 NCT6106_REG_TARGET[] = { 0x111, 0x121, 0x131 }; static const u16 NCT6106_REG_WEIGHT_TEMP_SEL[] = { 0x168, 0x178, 0x188 }; static const u16 NCT6106_REG_WEIGHT_TEMP_STEP[] = { 0x169, 0x179, 0x189 }; static const u16 NCT6106_REG_WEIGHT_TEMP_STEP_TOL[] = { 0x16a, 0x17a, 0x18a }; -static const u16 NCT6106_REG_WEIGHT_DUTY_STEP[] = { 0x16b, 0x17b, 0x17c }; +static const u16 NCT6106_REG_WEIGHT_DUTY_STEP[] = { 0x16b, 0x17b, 0x18b }; static const u16 NCT6106_REG_WEIGHT_TEMP_BASE[] = { 0x16c, 0x17c, 0x18c }; static const u16 NCT6106_REG_WEIGHT_DUTY_BASE[] = { 0x16d, 0x17d, 0x18d }; @@ -3764,6 +3764,7 @@ static int nct6775_probe(struct platform_device *pdev) data->REG_FAN_TIME[0] = NCT6106_REG_FAN_STOP_TIME; data->REG_FAN_TIME[1] = NCT6106_REG_FAN_STEP_UP_TIME; data->REG_FAN_TIME[2] = NCT6106_REG_FAN_STEP_DOWN_TIME; + data->REG_TOLERANCE_H = NCT6106_REG_TOLERANCE_H; data->REG_PWM[0] = NCT6106_REG_PWM; data->REG_PWM[1] = NCT6106_REG_FAN_START_OUTPUT; data->REG_PWM[2] = NCT6106_REG_FAN_STOP_OUTPUT; -- cgit v1.2.3