From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: [PATCH 5/5] ACPI / ACPICA: Fix sysfs GPE interface Date: Tue, 8 Jun 2010 10:50:53 +0200 Message-ID: <201006081050.53599.rjw@sisk.pl> References: <201006080024.46142.rjw@sisk.pl> <201006081046.48488.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <201006081046.48488.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org To: Len Brown Cc: Matthew Garrett , ACPI Devel Maling List , LKML , pm list , "Moore, Robert" , Len Brown , Zhang Rui List-Id: linux-acpi@vger.kernel.org From: Rafael J. Wysocki The sysfs interface allowing user space to disable/enable GPEs doesn't work correctly, because a GPE disabled this way will be re-enabled shortly by acpi_ev_asynch_enable_gpe() if it was previosuly enabled by acpi_enable_gpe() (in which case the corresponding bit in its enable register's enable_for_run mask is set). To address this issue make the sysfs GPE interface use acpi_enable_gpe() and acpi_disable_gpe() instead of acpi_set_gpe() so that GPE reference counters are modified by it along with the values of GPE enable registers. Signed-off-by: Rafael J. Wysocki --- drivers/acpi/system.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) Index: linux-2.6/drivers/acpi/system.c =================================================================== --- linux-2.6.orig/drivers/acpi/system.c +++ linux-2.6/drivers/acpi/system.c @@ -388,10 +388,12 @@ static ssize_t counter_set(struct kobjec if (index < num_gpes) { if (!strcmp(buf, "disable\n") && (status & ACPI_EVENT_FLAG_ENABLED)) - result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE); + result = acpi_disable_gpe(handle, index, + ACPI_GPE_TYPE_RUNTIME); else if (!strcmp(buf, "enable\n") && !(status & ACPI_EVENT_FLAG_ENABLED)) - result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE); + result = acpi_enable_gpe(handle, index, + ACPI_GPE_TYPE_RUNTIME); else if (!strcmp(buf, "clear\n") && (status & ACPI_EVENT_FLAG_SET)) result = acpi_clear_gpe(handle, index);