diff options
Diffstat (limited to 'drivers/hwmon/dell-smm-hwmon.c')
| -rw-r--r-- | drivers/hwmon/dell-smm-hwmon.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c index cbe1a74a3dee..6040a8940674 100644 --- a/drivers/hwmon/dell-smm-hwmon.c +++ b/drivers/hwmon/dell-smm-hwmon.c @@ -76,6 +76,9 @@ #define DELL_SMM_NO_TEMP 10 #define DELL_SMM_NO_FANS 4 +/* limit fan multiplier to avoid overflow */ +#define DELL_SMM_MAX_FAN_MULT (INT_MAX / U16_MAX) + struct smm_regs { unsigned int eax; unsigned int ebx; @@ -861,9 +864,9 @@ static umode_t dell_smm_is_visible(const void *drvdata, enum hwmon_sensor_types if (auto_fan) { /* * The setting affects all fans, so only create a - * single attribute. + * single attribute for the first fan channel. */ - if (channel != 1) + if (channel != 0) return 0; /* @@ -1253,6 +1256,12 @@ static int dell_smm_init_data(struct device *dev, const struct dell_smm_ops *ops data->ops = ops; /* All options must not be 0 */ data->i8k_fan_mult = fan_mult ? : I8K_FAN_MULT; + if (data->i8k_fan_mult > DELL_SMM_MAX_FAN_MULT) { + dev_err(dev, + "fan multiplier %u is too large (max %u)\n", + data->i8k_fan_mult, DELL_SMM_MAX_FAN_MULT); + return -EINVAL; + } data->i8k_fan_max = fan_max ? : I8K_FAN_HIGH; data->i8k_pwm_mult = DIV_ROUND_UP(255, data->i8k_fan_max); @@ -1534,6 +1543,15 @@ static const struct i8k_fan_control_data i8k_fan_control_data[] __initconst = { static const struct dmi_system_id i8k_whitelist_fan_control[] __initconst = { { + .ident = "Dell G5 5505", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "G5 5505"), + + }, + .driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], + }, + { .ident = "Dell Latitude 5480", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |