tree f1ebed3d60e21778a277759a0a3f5ff08938e058
parent 69ba91cbd6d79aa197adbdd10a44e71c84044b44
author Henrique de Moraes Holschuh <hmh@hmh.eng.br> 1164376030 -0200
committer Len Brown <len.brown@intel.com> 1165473519 -0500

ACPI: ibm-acpi: clean up fan_read

This patch cleans up fan_read so that it is much easier to read and
extend.

The patch fixes the userspace ABI to return "status: not supported" (like
all other ibm-acpi functions) when neither fan status or fan control are
possible.

It also fixes the userspace ABI to return EIO if ACPI access to the EC
fails, instead of returning "status: unreadable" or "speed: unreadable".

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>