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path: root/drivers/char/i8k.c
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Diffstat (limited to 'drivers/char/i8k.c')
-rw-r--r--drivers/char/i8k.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 34174d0..e34a019 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -298,7 +298,7 @@ static int i8k_get_temp(int sensor)
int temp;
#ifdef I8K_TEMPERATURE_BUG
- static int prev[4];
+ static int prev[4] = { I8K_MAX_TEMP+1, I8K_MAX_TEMP+1, I8K_MAX_TEMP+1, I8K_MAX_TEMP+1 };
#endif
regs.ebx = sensor & 0xff;
rc = i8k_smm(&regs);
@@ -317,10 +317,12 @@ static int i8k_get_temp(int sensor)
*/
if (temp > I8K_MAX_TEMP) {
temp = prev[sensor];
- prev[sensor] = I8K_MAX_TEMP;
+ prev[sensor] = I8K_MAX_TEMP+1;
} else {
prev[sensor] = temp;
}
+ if (temp > I8K_MAX_TEMP)
+ return -ERANGE;
#endif
return temp;
@@ -499,6 +501,8 @@ static ssize_t i8k_hwmon_show_temp(struct device *dev,
int temp;
temp = i8k_get_temp(index);
+ if (temp == -ERANGE)
+ return -EINVAL;
if (temp < 0)
return temp;
return sprintf(buf, "%d\n", temp * 1000);
@@ -610,17 +614,17 @@ static int __init i8k_init_hwmon(void)
/* CPU temperature attributes, if temperature reading is OK */
err = i8k_get_temp(0);
- if (err >= 0)
+ if (err >= 0 || err == -ERANGE)
i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1;
/* check for additional temperature sensors */
err = i8k_get_temp(1);
- if (err >= 0)
+ if (err >= 0 || err == -ERANGE)
i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2;
err = i8k_get_temp(2);
- if (err >= 0)
+ if (err >= 0 || err == -ERANGE)
i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3;
err = i8k_get_temp(3);
- if (err >= 0)
+ if (err >= 0 || err == -ERANGE)
i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4;
/* Left fan attributes, if left fan is present */
@@ -711,6 +715,14 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
.driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520],
},
{
+ .ident = "Dell Latitude E6440",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6440"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_E6540],
+ },
+ {
.ident = "Dell Latitude E6540",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -788,6 +800,8 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
{ }
};
+MODULE_DEVICE_TABLE(dmi, i8k_dmi_table);
+
/*
* Probe for the presence of a supported laptop.
*/
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