ACPI / EC: Use busy polling mode when GPE is not enabled

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commit c3a696b6e8 upstream.

When GPE is not enabled, it is not efficient to use the wait polling mode
as it introduces an unexpected scheduler delay.
So before the GPE handler is installed, this patch uses busy polling mode
for all EC(s) and the logic can be applied to non boot EC(s) during the
suspend/resume process.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=191561
Tested-by: Jakobus Schurz <jakobus.schurz@gmail.com>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Lv Zheng 2017-01-20 16:42:48 +08:00 • committed by Greg Kroah-Hartman

parent c07479f4b1

commit 0dd962118a

2 changed files with 32 additions and 34 deletions

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62

drivers/acpi/ec.c

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4

drivers/acpi/internal.h

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