Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 687 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/psparse.c b/drivers/acpi/acpica/psparse.c
new file mode 100644
index 000000000..ba93f3597
--- /dev/null
+++ b/drivers/acpi/acpica/psparse.c
@@ -0,0 +1,687 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: psparse - Parser top level AML parse routines
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+/*
+ * Parse the AML and build an operation tree as most interpreters,
+ * like Perl, do. Parsing is done by hand rather than with a YACC
+ * generated parser to tightly constrain stack and dynamic memory
+ * usage. At the same time, parsing is kept flexible and the code
+ * fairly compact by parsing based on a list of AML opcode
+ * templates in aml_op_info[]
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "amlcode.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+
+#define _COMPONENT          ACPI_PARSER
+ACPI_MODULE_NAME("psparse")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_opcode_size
+ *
+ * PARAMETERS:  opcode          - An AML opcode
+ *
+ * RETURN:      Size of the opcode, in bytes (1 or 2)
+ *
+ * DESCRIPTION: Get the size of the current opcode.
+ *
+ ******************************************************************************/
+u32 acpi_ps_get_opcode_size(u32 opcode)
+{
+
+	/* Extended (2-byte) opcode if > 255 */
+
+	if (opcode > 0x00FF) {
+		return (2);
+	}
+
+	/* Otherwise, just a single byte opcode */
+
+	return (1);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_peek_opcode
+ *
+ * PARAMETERS:  parser_state        - A parser state object
+ *
+ * RETURN:      Next AML opcode
+ *
+ * DESCRIPTION: Get next AML opcode (without incrementing AML pointer)
+ *
+ ******************************************************************************/
+
+u16 acpi_ps_peek_opcode(struct acpi_parse_state * parser_state)
+{
+	u8 *aml;
+	u16 opcode;
+
+	aml = parser_state->aml;
+	opcode = (u16) ACPI_GET8(aml);
+
+	if (opcode == AML_EXTENDED_PREFIX) {
+
+		/* Extended opcode, get the second opcode byte */
+
+		aml++;
+		opcode = (u16) ((opcode << 8) | ACPI_GET8(aml));
+	}
+
+	return (opcode);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_complete_this_op
+ *
+ * PARAMETERS:  walk_state      - Current State
+ *              op              - Op to complete
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform any cleanup at the completion of an Op.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_complete_this_op(struct acpi_walk_state *walk_state,
+			 union acpi_parse_object *op)
+{
+	union acpi_parse_object *prev;
+	union acpi_parse_object *next;
+	const struct acpi_opcode_info *parent_info;
+	union acpi_parse_object *replacement_op = NULL;
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE_PTR(ps_complete_this_op, op);
+
+	/* Check for null Op, can happen if AML code is corrupt */
+
+	if (!op) {
+		return_ACPI_STATUS(AE_OK);	/* OK for now */
+	}
+
+	acpi_ex_stop_trace_opcode(op, walk_state);
+
+	/* Delete this op and the subtree below it if asked to */
+
+	if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) !=
+	     ACPI_PARSE_DELETE_TREE)
+	    || (walk_state->op_info->class == AML_CLASS_ARGUMENT)) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Make sure that we only delete this subtree */
+
+	if (op->common.parent) {
+		prev = op->common.parent->common.value.arg;
+		if (!prev) {
+
+			/* Nothing more to do */
+
+			goto cleanup;
+		}
+
+		/*
+		 * Check if we need to replace the operator and its subtree
+		 * with a return value op (placeholder op)
+		 */
+		parent_info =
+		    acpi_ps_get_opcode_info(op->common.parent->common.
+					    aml_opcode);
+
+		switch (parent_info->class) {
+		case AML_CLASS_CONTROL:
+
+			break;
+
+		case AML_CLASS_CREATE:
+			/*
+			 * These opcodes contain term_arg operands. The current
+			 * op must be replaced by a placeholder return op
+			 */
+			replacement_op =
+			    acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP,
+					     op->common.aml);
+			if (!replacement_op) {
+				status = AE_NO_MEMORY;
+			}
+			break;
+
+		case AML_CLASS_NAMED_OBJECT:
+			/*
+			 * These opcodes contain term_arg operands. The current
+			 * op must be replaced by a placeholder return op
+			 */
+			if ((op->common.parent->common.aml_opcode ==
+			     AML_REGION_OP)
+			    || (op->common.parent->common.aml_opcode ==
+				AML_DATA_REGION_OP)
+			    || (op->common.parent->common.aml_opcode ==
+				AML_BUFFER_OP)
+			    || (op->common.parent->common.aml_opcode ==
+				AML_PACKAGE_OP)
+			    || (op->common.parent->common.aml_opcode ==
+				AML_BANK_FIELD_OP)
+			    || (op->common.parent->common.aml_opcode ==
+				AML_VARIABLE_PACKAGE_OP)) {
+				replacement_op =
+				    acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP,
+						     op->common.aml);
+				if (!replacement_op) {
+					status = AE_NO_MEMORY;
+				}
+			} else
+			    if ((op->common.parent->common.aml_opcode ==
+				 AML_NAME_OP)
+				&& (walk_state->pass_number <=
+				    ACPI_IMODE_LOAD_PASS2)) {
+				if ((op->common.aml_opcode == AML_BUFFER_OP)
+				    || (op->common.aml_opcode == AML_PACKAGE_OP)
+				    || (op->common.aml_opcode ==
+					AML_VARIABLE_PACKAGE_OP)) {
+					replacement_op =
+					    acpi_ps_alloc_op(op->common.
+							     aml_opcode,
+							     op->common.aml);
+					if (!replacement_op) {
+						status = AE_NO_MEMORY;
+					} else {
+						replacement_op->named.data =
+						    op->named.data;
+						replacement_op->named.length =
+						    op->named.length;
+					}
+				}
+			}
+			break;
+
+		default:
+
+			replacement_op =
+			    acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP,
+					     op->common.aml);
+			if (!replacement_op) {
+				status = AE_NO_MEMORY;
+			}
+		}
+
+		/* We must unlink this op from the parent tree */
+
+		if (prev == op) {
+
+			/* This op is the first in the list */
+
+			if (replacement_op) {
+				replacement_op->common.parent =
+				    op->common.parent;
+				replacement_op->common.value.arg = NULL;
+				replacement_op->common.node = op->common.node;
+				op->common.parent->common.value.arg =
+				    replacement_op;
+				replacement_op->common.next = op->common.next;
+			} else {
+				op->common.parent->common.value.arg =
+				    op->common.next;
+			}
+		}
+
+		/* Search the parent list */
+
+		else
+			while (prev) {
+
+				/* Traverse all siblings in the parent's argument list */
+
+				next = prev->common.next;
+				if (next == op) {
+					if (replacement_op) {
+						replacement_op->common.parent =
+						    op->common.parent;
+						replacement_op->common.value.
+						    arg = NULL;
+						replacement_op->common.node =
+						    op->common.node;
+						prev->common.next =
+						    replacement_op;
+						replacement_op->common.next =
+						    op->common.next;
+						next = NULL;
+					} else {
+						prev->common.next =
+						    op->common.next;
+						next = NULL;
+					}
+				}
+				prev = next;
+			}
+	}
+
+cleanup:
+
+	/* Now we can actually delete the subtree rooted at Op */
+
+	acpi_ps_delete_parse_tree(op);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_next_parse_state
+ *
+ * PARAMETERS:  walk_state          - Current state
+ *              op                  - Current parse op
+ *              callback_status     - Status from previous operation
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Update the parser state based upon the return exception from
+ *              the parser callback.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
+			 union acpi_parse_object *op,
+			 acpi_status callback_status)
+{
+	struct acpi_parse_state *parser_state = &walk_state->parser_state;
+	acpi_status status = AE_CTRL_PENDING;
+
+	ACPI_FUNCTION_TRACE_PTR(ps_next_parse_state, op);
+
+	switch (callback_status) {
+	case AE_CTRL_TERMINATE:
+		/*
+		 * A control method was terminated via a RETURN statement.
+		 * The walk of this method is complete.
+		 */
+		parser_state->aml = parser_state->aml_end;
+		status = AE_CTRL_TERMINATE;
+		break;
+
+	case AE_CTRL_BREAK:
+
+		parser_state->aml = walk_state->aml_last_while;
+		walk_state->control_state->common.value = FALSE;
+		status = AE_CTRL_BREAK;
+		break;
+
+	case AE_CTRL_CONTINUE:
+
+		parser_state->aml = walk_state->aml_last_while;
+		status = AE_CTRL_CONTINUE;
+		break;
+
+	case AE_CTRL_PENDING:
+
+		parser_state->aml = walk_state->aml_last_while;
+		break;
+
+#if 0
+	case AE_CTRL_SKIP:
+
+		parser_state->aml = parser_state->scope->parse_scope.pkg_end;
+		status = AE_OK;
+		break;
+#endif
+
+	case AE_CTRL_TRUE:
+		/*
+		 * Predicate of an IF was true, and we are at the matching ELSE.
+		 * Just close out this package
+		 */
+		parser_state->aml = acpi_ps_get_next_package_end(parser_state);
+		status = AE_CTRL_PENDING;
+		break;
+
+	case AE_CTRL_FALSE:
+		/*
+		 * Either an IF/WHILE Predicate was false or we encountered a BREAK
+		 * opcode. In both cases, we do not execute the rest of the
+		 * package;  We simply close out the parent (finishing the walk of
+		 * this branch of the tree) and continue execution at the parent
+		 * level.
+		 */
+		parser_state->aml = parser_state->scope->parse_scope.pkg_end;
+
+		/* In the case of a BREAK, just force a predicate (if any) to FALSE */
+
+		walk_state->control_state->common.value = FALSE;
+		status = AE_CTRL_END;
+		break;
+
+	case AE_CTRL_TRANSFER:
+
+		/* A method call (invocation) -- transfer control */
+
+		status = AE_CTRL_TRANSFER;
+		walk_state->prev_op = op;
+		walk_state->method_call_op = op;
+		walk_state->method_call_node =
+		    (op->common.value.arg)->common.node;
+
+		/* Will return value (if any) be used by the caller? */
+
+		walk_state->return_used =
+		    acpi_ds_is_result_used(op, walk_state);
+		break;
+
+	default:
+
+		status = callback_status;
+		if (ACPI_CNTL_EXCEPTION(callback_status)) {
+			status = AE_OK;
+		}
+		break;
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_parse_aml
+ *
+ * PARAMETERS:  walk_state      - Current state
+ *
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Parse raw AML and return a tree of ops
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
+{
+	acpi_status status;
+	struct acpi_thread_state *thread;
+	struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list;
+	struct acpi_walk_state *previous_walk_state;
+
+	ACPI_FUNCTION_TRACE(ps_parse_aml);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+			  "Entered with WalkState=%p Aml=%p size=%X\n",
+			  walk_state, walk_state->parser_state.aml,
+			  walk_state->parser_state.aml_size));
+
+	if (!walk_state->parser_state.aml) {
+		return_ACPI_STATUS(AE_BAD_ADDRESS);
+	}
+
+	/* Create and initialize a new thread state */
+
+	thread = acpi_ut_create_thread_state();
+	if (!thread) {
+		if (walk_state->method_desc) {
+
+			/* Executing a control method - additional cleanup */
+
+			acpi_ds_terminate_control_method(walk_state->
+							 method_desc,
+							 walk_state);
+		}
+
+		acpi_ds_delete_walk_state(walk_state);
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	walk_state->thread = thread;
+
+	/*
+	 * If executing a method, the starting sync_level is this method's
+	 * sync_level
+	 */
+	if (walk_state->method_desc) {
+		walk_state->thread->current_sync_level =
+		    walk_state->method_desc->method.sync_level;
+	}
+
+	acpi_ds_push_walk_state(walk_state, thread);
+
+	/*
+	 * This global allows the AML debugger to get a handle to the currently
+	 * executing control method.
+	 */
+	acpi_gbl_current_walk_list = thread;
+
+	/*
+	 * Execute the walk loop as long as there is a valid Walk State. This
+	 * handles nested control method invocations without recursion.
+	 */
+	ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "State=%p\n", walk_state));
+
+	status = AE_OK;
+	while (walk_state) {
+		if (ACPI_SUCCESS(status)) {
+			/*
+			 * The parse_loop executes AML until the method terminates
+			 * or calls another method.
+			 */
+			status = acpi_ps_parse_loop(walk_state);
+		}
+
+		ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+				  "Completed one call to walk loop, %s State=%p\n",
+				  acpi_format_exception(status), walk_state));
+
+		if (walk_state->method_pathname && walk_state->method_is_nested) {
+
+			/* Optional object evaluation log */
+
+			ACPI_DEBUG_PRINT_RAW((ACPI_DB_EVALUATION,
+					      "%-26s:  %*s%s\n",
+					      "   Exit nested method",
+					      (walk_state->
+					       method_nesting_depth + 1) * 3,
+					      " ",
+					      &walk_state->method_pathname[1]));
+
+			ACPI_FREE(walk_state->method_pathname);
+			walk_state->method_is_nested = FALSE;
+		}
+		if (status == AE_CTRL_TRANSFER) {
+			/*
+			 * A method call was detected.
+			 * Transfer control to the called control method
+			 */
+			status =
+			    acpi_ds_call_control_method(thread, walk_state,
+							NULL);
+			if (ACPI_FAILURE(status)) {
+				status =
+				    acpi_ds_method_error(status, walk_state);
+			}
+
+			/*
+			 * If the transfer to the new method method call worked,
+			 * a new walk state was created -- get it
+			 */
+			walk_state = acpi_ds_get_current_walk_state(thread);
+			continue;
+		} else if (status == AE_CTRL_TERMINATE) {
+			status = AE_OK;
+		} else if ((status != AE_OK) && (walk_state->method_desc)) {
+
+			/* Either the method parse or actual execution failed */
+
+			acpi_ex_exit_interpreter();
+			if (status == AE_ABORT_METHOD) {
+				acpi_ns_print_node_pathname(walk_state->
+							    method_node,
+							    "Aborting method");
+				acpi_os_printf("\n");
+			} else {
+				ACPI_ERROR_METHOD("Aborting method",
+						  walk_state->method_node, NULL,
+						  status);
+			}
+			acpi_ex_enter_interpreter();
+
+			/* Check for possible multi-thread reentrancy problem */
+
+			if ((status == AE_ALREADY_EXISTS) &&
+			    (!(walk_state->method_desc->method.info_flags &
+			       ACPI_METHOD_SERIALIZED))) {
+				/*
+				 * Method is not serialized and tried to create an object
+				 * twice. The probable cause is that the method cannot
+				 * handle reentrancy. Mark as "pending serialized" now, and
+				 * then mark "serialized" when the last thread exits.
+				 */
+				walk_state->method_desc->method.info_flags |=
+				    ACPI_METHOD_SERIALIZED_PENDING;
+			}
+		}
+
+		/* We are done with this walk, move on to the parent if any */
+
+		walk_state = acpi_ds_pop_walk_state(thread);
+
+		/* Reset the current scope to the beginning of scope stack */
+
+		acpi_ds_scope_stack_clear(walk_state);
+
+		/*
+		 * If we just returned from the execution of a control method or if we
+		 * encountered an error during the method parse phase, there's lots of
+		 * cleanup to do
+		 */
+		if (((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
+		     ACPI_PARSE_EXECUTE &&
+		     !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) ||
+		    (ACPI_FAILURE(status))) {
+			acpi_ds_terminate_control_method(walk_state->
+							 method_desc,
+							 walk_state);
+		}
+
+		/* Delete this walk state and all linked control states */
+
+		acpi_ps_cleanup_scope(&walk_state->parser_state);
+		previous_walk_state = walk_state;
+
+		ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+				  "ReturnValue=%p, ImplicitValue=%p State=%p\n",
+				  walk_state->return_desc,
+				  walk_state->implicit_return_obj, walk_state));
+
+		/* Check if we have restarted a preempted walk */
+
+		walk_state = acpi_ds_get_current_walk_state(thread);
+		if (walk_state) {
+			if (ACPI_SUCCESS(status)) {
+				/*
+				 * There is another walk state, restart it.
+				 * If the method return value is not used by the parent,
+				 * The object is deleted
+				 */
+				if (!previous_walk_state->return_desc) {
+					/*
+					 * In slack mode execution, if there is no return value
+					 * we should implicitly return zero (0) as a default value.
+					 */
+					if (acpi_gbl_enable_interpreter_slack &&
+					    !previous_walk_state->
+					    implicit_return_obj) {
+						previous_walk_state->
+						    implicit_return_obj =
+						    acpi_ut_create_integer_object
+						    ((u64) 0);
+						if (!previous_walk_state->
+						    implicit_return_obj) {
+							return_ACPI_STATUS
+							    (AE_NO_MEMORY);
+						}
+					}
+
+					/* Restart the calling control method */
+
+					status =
+					    acpi_ds_restart_control_method
+					    (walk_state,
+					     previous_walk_state->
+					     implicit_return_obj);
+				} else {
+					/*
+					 * We have a valid return value, delete any implicit
+					 * return value.
+					 */
+					acpi_ds_clear_implicit_return
+					    (previous_walk_state);
+
+					status =
+					    acpi_ds_restart_control_method
+					    (walk_state,
+					     previous_walk_state->return_desc);
+				}
+				if (ACPI_SUCCESS(status)) {
+					walk_state->walk_type |=
+					    ACPI_WALK_METHOD_RESTART;
+				}
+			} else {
+				/* On error, delete any return object or implicit return */
+
+				acpi_ut_remove_reference(previous_walk_state->
+							 return_desc);
+				acpi_ds_clear_implicit_return
+				    (previous_walk_state);
+			}
+		}
+
+		/*
+		 * Just completed a 1st-level method, save the final internal return
+		 * value (if any)
+		 */
+		else if (previous_walk_state->caller_return_desc) {
+			if (previous_walk_state->implicit_return_obj) {
+				*(previous_walk_state->caller_return_desc) =
+				    previous_walk_state->implicit_return_obj;
+			} else {
+				/* NULL if no return value */
+
+				*(previous_walk_state->caller_return_desc) =
+				    previous_walk_state->return_desc;
+			}
+		} else {
+			if (previous_walk_state->return_desc) {
+
+				/* Caller doesn't want it, must delete it */
+
+				acpi_ut_remove_reference(previous_walk_state->
+							 return_desc);
+			}
+			if (previous_walk_state->implicit_return_obj) {
+
+				/* Caller doesn't want it, must delete it */
+
+				acpi_ut_remove_reference(previous_walk_state->
+							 implicit_return_obj);
+			}
+		}
+
+		acpi_ds_delete_walk_state(previous_walk_state);
+	}
+
+	/* Normal exit */
+
+	acpi_ex_release_all_mutexes(thread);
+	acpi_ut_delete_generic_state(ACPI_CAST_PTR
+				     (union acpi_generic_state, thread));
+	acpi_gbl_current_walk_list = prev_walk_list;
+	return_ACPI_STATUS(status);
+}