diff options
| author | Jean Delvare <khali@linux-fr.org> | 2007-10-22 19:47:58 +0400 |
|---|---|---|
| committer | Mark M. Hoffman <mhoffman@lightlink.com> | 2008-02-08 04:39:41 +0300 |
| commit | 21df67b191fd612fa28aedd39ec1414d8effc454 (patch) | |
| tree | 92a73a43ac9361cf30b7d71f228edaaefa666415 | |
| parent | da6848da293b88e5ac46f5ecc6ae41122d5f680b (diff) | |
| download | linux-21df67b191fd612fa28aedd39ec1414d8effc454.tar.xz | |
hwmon: (gl518sm) Report error on invalid fan div value
If the user attempts to write a fan clock divider not supported by
the chip, an error should be returned.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
| -rw-r--r-- | drivers/hwmon/gl518sm.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/hwmon/gl518sm.c b/drivers/hwmon/gl518sm.c index 535ad8776a68..c5255118bc16 100644 --- a/drivers/hwmon/gl518sm.c +++ b/drivers/hwmon/gl518sm.c @@ -107,7 +107,6 @@ static inline u8 FAN_TO_REG(long rpm, int div) #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) #define VDD_FROM_REG(val) (((val)*95+2)/4) -#define DIV_TO_REG(val) ((val)==4?2:(val)==2?1:(val)==1?0:3) #define DIV_FROM_REG(val) (1 << (val)) #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) @@ -302,9 +301,20 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, int regvalue; unsigned long val = simple_strtoul(buf, NULL, 10); + switch (val) { + case 1: val = 0; break; + case 2: val = 1; break; + case 4: val = 2; break; + case 8: val = 3; break; + default: + dev_err(dev, "Invalid fan clock divider %lu, choose one " + "of 1, 2, 4 or 8\n", val); + return -EINVAL; + } + mutex_lock(&data->update_lock); regvalue = gl518_read_value(client, GL518_REG_MISC); - data->fan_div[nr] = DIV_TO_REG(val); + data->fan_div[nr] = val; regvalue = (regvalue & ~(0xc0 >> (2 * nr))) | (data->fan_div[nr] << (6 - 2 * nr)); gl518_write_value(client, GL518_REG_MISC, regvalue); |