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

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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>
This commit is contained in:
Lv Zheng
2017-01-20 16:42:48 +08:00
committed by Rafael J. Wysocki
parent 4c237371f2
commit c3a696b6e8
2 changed files with 32 additions and 34 deletions
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4
drivers/acpi/internal.h
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@@ -172,8 +172,8 @@ struct acpi_ec {
struct work_struct work;
unsigned long timestamp;
unsigned long nr_pending_queries;
bool saved_busy_polling;
unsigned int saved_polling_guard;
bool busy_polling;
unsigned int polling_guard;
};
extern struct acpi_ec *first_ec;