diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 601dbe8b407a..7dc6b73e8f5b 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -239,6 +239,7 @@ static struct { static struct { u16 hotkey_mask_ff:1; + u16 bright_cmos_ec_unsync:1; } tp_warned; struct thinkpad_id_data { @@ -4323,13 +4324,20 @@ static int brightness_get(struct backlight_device *bd) level = lcmos; } - if (brightness_mode == 3 && lec != lcmos) { - printk(TPACPI_ERR - "CMOS NVRAM (%u) and EC (%u) do not agree " - "on display brightness level\n", - (unsigned int) lcmos, - (unsigned int) lec); - return -EIO; + if (brightness_mode == 3) { + if (lec == lcmos) + tp_warned.bright_cmos_ec_unsync = 0; + else { + if (!tp_warned.bright_cmos_ec_unsync) { + printk(TPACPI_ERR + "CMOS NVRAM (%u) and EC (%u) do not " + "agree on display brightness level\n", + (unsigned int) lcmos, + (unsigned int) lec); + tp_warned.bright_cmos_ec_unsync = 1; + } + return -EIO; + } } return level; |