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ACPI / EC: Fix unexpected ec_remove_handlers() invocations

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The ec_remove_handlers() is invoked without checking
EC_FLAGS_HANDLERS_INSTALLED, this patch enhances this check to avoid issues
that acpi_disable_gpe() is invoked unexpectedly to reduce the GPE runtime
count. This may happen when the EC handler installation failed on some
platforms.

Reported-by: Venkat Raghavulu <venkat.raghavulu@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 2014-12-15 08:47:52 +08:00 committed by Rafael J. Wysocki
parent b2776bf714
commit 1741acea75
1 changed files with 2 additions and 0 deletions
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drivers/acpi/ec.c
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@ -844,6 +844,8 @@ static int ec_install_handlers(struct acpi_ec *ec)
static void ec_remove_handlers(struct acpi_ec *ec)
{
if (!test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
return;
acpi_disable_gpe(NULL, ec->gpe);
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))