From 02f7f4c9f46e9da6d0e7f8b380703eaa7a59bebc Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 8 Jun 2010 10:50:20 +0200 Subject: [PATCH] ACPI / ACPICA: Fix GPE initialization commit ce43ace02320a3fb9614ddb27edc3a8700d68b26 upstream. While developing the GPE reference counting code we overlooked the fact that acpi_ev_update_gpes() could have enabled GPEs before acpi_ev_initialize_gpe_block() was called. As a result, some GPEs are enabled twice during the initialization. To fix this issue avoid calling acpi_enable_gpe() from acpi_ev_initialize_gpe_block() for the GPEs that have nonzero runtime reference counters. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/acpica/evgpeblk.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c index fef721917eaf..a439850a421c 100644 --- a/drivers/acpi/acpica/evgpeblk.c +++ b/drivers/acpi/acpica/evgpeblk.c @@ -1023,6 +1023,19 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, /* Get the info block for this particular GPE */ gpe_index = (acpi_size)i * ACPI_GPE_REGISTER_WIDTH + j; gpe_event_info = &gpe_block->event_info[gpe_index]; + gpe_number = gpe_index + gpe_block->block_base_number; + + /* + * If the GPE has already been enabled for runtime + * signaling, make sure it remains enabled, but do not + * increment its reference counter. + */ + if (gpe_event_info->runtime_count) { + acpi_set_gpe(gpe_device, gpe_number, + ACPI_GPE_ENABLE); + gpe_enabled_count++; + continue; + } if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) { wake_gpe_count++; @@ -1033,7 +1046,6 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) continue; - gpe_number = gpe_index + gpe_block->block_base_number; status = acpi_enable_gpe(gpe_device, gpe_number, ACPI_GPE_TYPE_RUNTIME); if (ACPI_FAILURE(status)) -- 2.39.5