Revert "ACPICA: Events: Support fixed PCIe wake event"

This reverts commit 5c62d5aa.

This broke wake-on-lan for multiple people, and for much too long.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217069
Link: https://lore.kernel.org/all/754225a2-95a9-2c36-1886-7da1a78308c2@loongson.cn/
Link: https://github.com/acpica/acpica/pull/866
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Jianmin Lv <lvjianmin@loongson.cn>
Cc: Huacai Chen <chenhuacai@loongson.cn>
Cc: Bob Moore <robert.moore@intel.com>
Cc: stable@kernel.org # 6.2
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/acpi/acpica/evevent.c

@@ -142,9 +142,6 @@ static acpi_status acpi_ev_fixed_event_initialize(void)
 			status =
 			    acpi_write_bit_register(acpi_gbl_fixed_event_info
 						    [i].enable_register_id,
-						    (i ==
-						     ACPI_EVENT_PCIE_WAKE) ?
-						    ACPI_ENABLE_EVENT :
 						    ACPI_DISABLE_EVENT);
 			if (ACPI_FAILURE(status)) {
 				return (status);
@@ -188,11 +185,6 @@ u32 acpi_ev_fixed_event_detect(void)
 		return (int_status);
 	}
 
-	if (fixed_enable & ACPI_BITMASK_PCIEXP_WAKE_DISABLE)
-		fixed_enable &= ~ACPI_BITMASK_PCIEXP_WAKE_DISABLE;
-	else
-		fixed_enable |= ACPI_BITMASK_PCIEXP_WAKE_DISABLE;
-
 	ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
 			  "Fixed Event Block: Enable %08X Status %08X\n",
 			  fixed_enable, fixed_status));
@@ -258,9 +250,6 @@ static u32 acpi_ev_fixed_event_dispatch(u32 event)
 	if (!acpi_gbl_fixed_event_handlers[event].handler) {
 		(void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
 					      enable_register_id,
-					      (event ==
-					       ACPI_EVENT_PCIE_WAKE) ?
-					      ACPI_ENABLE_EVENT :
 					      ACPI_DISABLE_EVENT);
 
 		ACPI_ERROR((AE_INFO,

drivers/acpi/acpica/hwsleep.c

@@ -311,20 +311,6 @@ acpi_status acpi_hw_legacy_wake(u8 sleep_state)
 				    [ACPI_EVENT_SLEEP_BUTTON].
 				    status_register_id, ACPI_CLEAR_STATUS);
 
-	/* Enable pcie wake event if support */
-	if ((acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE)) {
-		(void)
-		    acpi_write_bit_register(acpi_gbl_fixed_event_info
-					    [ACPI_EVENT_PCIE_WAKE].
-					    enable_register_id,
-					    ACPI_DISABLE_EVENT);
-		(void)
-		    acpi_write_bit_register(acpi_gbl_fixed_event_info
-					    [ACPI_EVENT_PCIE_WAKE].
-					    status_register_id,
-					    ACPI_CLEAR_STATUS);
-	}
-
 	acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING);
 	return_ACPI_STATUS(status);
 }

drivers/acpi/acpica/utglobal.c

@@ -186,10 +186,6 @@ struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] =
 					ACPI_BITREG_RT_CLOCK_ENABLE,
 					ACPI_BITMASK_RT_CLOCK_STATUS,
 					ACPI_BITMASK_RT_CLOCK_ENABLE},
-	/* ACPI_EVENT_PCIE_WAKE     */ {ACPI_BITREG_PCIEXP_WAKE_STATUS,
-					ACPI_BITREG_PCIEXP_WAKE_DISABLE,
-					ACPI_BITMASK_PCIEXP_WAKE_STATUS,
-					ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
 };
 #endif				/* !ACPI_REDUCED_HARDWARE */
 

include/acpi/actypes.h

@@ -723,8 +723,7 @@ typedef u32 acpi_event_type;
 #define ACPI_EVENT_POWER_BUTTON         2
 #define ACPI_EVENT_SLEEP_BUTTON         3
 #define ACPI_EVENT_RTC                  4
-#define ACPI_EVENT_PCIE_WAKE            5
-#define ACPI_EVENT_MAX                  5
+#define ACPI_EVENT_MAX                  4
 #define ACPI_NUM_FIXED_EVENTS           ACPI_EVENT_MAX + 1
 
 /*