ACPI: EC: Eliminate EC_FLAGS_QUERY_HANDSHAKE

The EC_FLAGS_QUERY_HANDSHAKE switch is never set in the current
code (the only function setting it is defined under #if 0) and
has no effect whatever, so eliminate it and drop the code
depending on it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 8025a07..9c74105 100644 (file)
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -182,7 +182,6 @@ static bool boot_ec_is_ecdt = false;
 static struct workqueue_struct *ec_wq;
 static struct workqueue_struct *ec_query_wq;
 
-static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */
 static int EC_FLAGS_CORRECT_ECDT; /* Needs ECDT port address correction */
 static int EC_FLAGS_IGNORE_DSDT_GPE; /* Needs ECDT GPE as correction setting */
 static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */
@@ -690,21 +689,9 @@ static void advance_transaction(struct acpi_ec *ec)
                        wakeup = true;
                }
                goto out;
-       } else {
-               if (EC_FLAGS_QUERY_HANDSHAKE &&
-                   !(status & ACPI_EC_FLAG_SCI) &&
-                   (t->command == ACPI_EC_COMMAND_QUERY)) {
-                       ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);
-                       t->rdata[t->ri++] = 0x00;
-                       ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);
-                       ec_dbg_evt("Command(%s) completed by software",
-                                  acpi_ec_cmd_string(ACPI_EC_COMMAND_QUERY));
-                       wakeup = true;
-               } else if ((status & ACPI_EC_FLAG_IBF) == 0) {
-                       acpi_ec_write_cmd(ec, t->command);
-                       ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);
-               } else
-                       goto err;
+       } else if (!(status & ACPI_EC_FLAG_IBF)) {
+               acpi_ec_write_cmd(ec, t->command);
+               ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);
                goto out;
        }
 err:
@@ -1805,22 +1792,6 @@ static void __init acpi_ec_ecdt_start(void)
        acpi_bus_register_early_device(ACPI_BUS_TYPE_ECDT_EC);
 }
 
-#if 0
-/*
- * Some EC firmware variations refuses to respond QR_EC when SCI_EVT is not
- * set, for which case, we complete the QR_EC without issuing it to the
- * firmware.
- * https://bugzilla.kernel.org/show_bug.cgi?id=82611
- * https://bugzilla.kernel.org/show_bug.cgi?id=97381
- */
-static int ec_flag_query_handshake(const struct dmi_system_id *id)
-{
-       pr_debug("Detected the EC firmware requiring QR_EC issued when SCI_EVT set\n");
-       EC_FLAGS_QUERY_HANDSHAKE = 1;
-       return 0;
-}
-#endif
-
 /*
  * On some hardware it is necessary to clear events accumulated by the EC during
  * sleep. These ECs stop reporting GPEs until they are manually polled, if too