diff options
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index a4d7ee47239..79abc6841e3 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -3185,6 +3185,13 @@ static int fan_set_level(int level) ((level < 0) || (level > 7))) return -EINVAL; + /* safety net should the EC not support AUTO + * or FULLSPEED mode bits and just ignore them */ + if (level & TP_EC_FAN_FULLSPEED) + level |= 7; /* safety min speed 7 */ + else if (level & TP_EC_FAN_FULLSPEED) + level |= 4; /* safety min speed 4 */ + if (!acpi_ec_write(fan_status_offset, level)) return -EIO; else @@ -3233,8 +3240,10 @@ static int fan_set_enable(void) break; /* Don't go out of emergency fan mode */ - if (s != 7) - s = TP_EC_FAN_AUTO; + if (s != 7) { + s &= 0x07; + s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ + } if (!acpi_ec_write(fan_status_offset, s)) rc = -EIO; @@ -3252,8 +3261,7 @@ static int fan_set_enable(void) s &= 0x07; /* Set fan to at least level 4 */ - if (s < 4) - s = 4; + s |= 4; if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) rc= -EIO; |