ACPI: EC: fix dmesg spam regression
Return OBF_1 optimization workaround
http://bugzilla.kernel.org/show_bug.cgi?id=8459
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 97dc161..8917d75 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -82,6 +82,7 @@
EC_FLAGS_ADDRESS, /* Address is being written */
EC_FLAGS_NO_WDATA_GPE, /* Don't expect WDATA GPE event */
EC_FLAGS_WDATA, /* Data is being written */
+ EC_FLAGS_NO_OBF1_GPE, /* Don't expect GPE before read */
};
static int acpi_ec_remove(struct acpi_device *device, int type);
@@ -179,6 +180,10 @@
static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
{
int ret = 0;
+
+ if (unlikely(event == ACPI_EC_EVENT_OBF_1 &&
+ test_bit(EC_FLAGS_NO_OBF1_GPE, &ec->flags)))
+ force_poll = 1;
if (unlikely(test_bit(EC_FLAGS_ADDRESS, &ec->flags) &&
test_bit(EC_FLAGS_NO_ADDRESS_GPE, &ec->flags)))
force_poll = 1;
@@ -192,7 +197,12 @@
goto end;
clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
if (acpi_ec_check_status(ec, event)) {
- if (test_bit(EC_FLAGS_ADDRESS, &ec->flags)) {
+ if (event == ACPI_EC_EVENT_OBF_1) {
+ /* miss OBF_1 GPE, don't expect it */
+ pr_info(PREFIX "missing OBF confirmation, "
+ "don't expect it any longer.\n");
+ set_bit(EC_FLAGS_NO_OBF1_GPE, &ec->flags);
+ } else if (test_bit(EC_FLAGS_ADDRESS, &ec->flags)) {
/* miss address GPE, don't expect it anymore */
pr_info(PREFIX "missing address confirmation, "
"don't expect it any longer.\n");