ACPI: thinkpad-acpi: rate-limit CMOS/EC unsynced error messages
authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Sat, 26 Apr 2008 04:02:20 +0000 (01:02 -0300)
committerLen Brown <len.brown@intel.com>
Tue, 29 Apr 2008 13:47:00 +0000 (09:47 -0400)
commit2d5e94d7ca315f859a0eee1366838e8ad34dd7b2
tree3bbf8aff5cc01084984b07da060add73d3c0cd4c
parent8c74adbc692a3cb040cc69d7ca3dfd86d75860a8
ACPI: thinkpad-acpi: rate-limit CMOS/EC unsynced error messages

If userspace applications mess with the CMOS NVRAM, or something causes
both the ACPI firmware and thinkpad-acpi to try to change the brightness at
the same time, it is possible to have the CMOS and EC registers for the
current brightness go out of sync.

Should that happen, thinkpad-acpi could be really obnoxious when using a
brightness_mode of 3 (both EC and CMOS).  Instead of complaining a massive
number of times, make sure to complain only once until EC and CMOS are back
in sync.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Joerg Platte <lists@naasa.net>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/misc/thinkpad_acpi.c