hwmon: (dell-smm) Disable fan support for Dell Inspiron 7720
commitf480ea90b9dd7dfcf9031c82abc294f86d7db435
authorPali Rohár <pali.rohar@gmail.com>
Sat, 27 Jan 2018 16:28:34 +0000 (27 17:28 +0100)
committerGuenter Roeck <linux@roeck-us.net>
Sat, 27 Jan 2018 17:34:03 +0000 (27 09:34 -0800)
tree76a926f08f16739761c971dcddbb32d68a2144e2
parent836ad11235d04f7a6fcd41b1abceaeacc70153c0
hwmon: (dell-smm) Disable fan support for Dell Inspiron 7720

Calling fan related SMM functions implemented by Dell BIOS firmware on Dell
Inspiron 7720 freeze kernel for about 500ms. Until Dell fixes it we need to
disable fan support for Dell Inspiron 7720 as it makes system unusable.

Via "force" module param fan support can be enabled.

Reported-by: vova7890@mail.ru
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195751
Cc: stable@vger.kernel.org # v4.0+, will need backport
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
drivers/hwmon/dell-smm-hwmon.c