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authorRafael J. Wysocki <rjw@sisk.pl>2010-06-08 10:50:20 +0200
committerLen Brown <len.brown@intel.com>2010-06-12 00:45:19 -0400
commitce43ace02320a3fb9614ddb27edc3a8700d68b26 (patch)
treef9f58a63160186d343da73e2d5d966fdeeefb35b
parentc9a8bbb7704cbf515c0fc68970abbe4e91d68521 (diff)
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ACPI / ACPICA: Fix GPE initialization
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 <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--drivers/acpi/acpica/evgpeblk.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 85ded1f2540..79048de0ade 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -1024,6 +1024,19 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
gpe_index = (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++;
@@ -1040,7 +1053,6 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
/* Enable this GPE */
- 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)) {