12 files changed, 190 insertions, 92 deletions

diff --git a/drivers/acpi/acpi_configfs.c b/drivers/acpi/acpi_configfs.c
index b58850389094..81bfc6197293 100644
--- a/drivers/acpi/acpi_configfs.c
+++ b/drivers/acpi/acpi_configfs.c
@@ -97,12 +97,12 @@ static ssize_t acpi_table_aml_read(struct config_item *cfg,
 
 CONFIGFS_BIN_ATTR(acpi_table_, aml, NULL, MAX_ACPI_TABLE_SIZE);
 
-struct configfs_bin_attribute *acpi_table_bin_attrs[] = {
+static struct configfs_bin_attribute *acpi_table_bin_attrs[] = {
 	&acpi_table_attr_aml,
 	NULL,
 };
 
-ssize_t acpi_table_signature_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_signature_show(struct config_item *cfg, char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -112,7 +112,7 @@ ssize_t acpi_table_signature_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%.*s\n", ACPI_NAME_SIZE, h->signature);
 }
 
-ssize_t acpi_table_length_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_length_show(struct config_item *cfg, char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -122,7 +122,7 @@ ssize_t acpi_table_length_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%d\n", h->length);
 }
 
-ssize_t acpi_table_revision_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_revision_show(struct config_item *cfg, char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -132,7 +132,7 @@ ssize_t acpi_table_revision_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%d\n", h->revision);
 }
 
-ssize_t acpi_table_oem_id_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_oem_id_show(struct config_item *cfg, char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -142,7 +142,7 @@ ssize_t acpi_table_oem_id_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%.*s\n", ACPI_OEM_ID_SIZE, h->oem_id);
 }
 
-ssize_t acpi_table_oem_table_id_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_oem_table_id_show(struct config_item *cfg, char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -152,7 +152,7 @@ ssize_t acpi_table_oem_table_id_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%.*s\n", ACPI_OEM_TABLE_ID_SIZE, h->oem_table_id);
 }
 
-ssize_t acpi_table_oem_revision_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_oem_revision_show(struct config_item *cfg, char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -162,7 +162,8 @@ ssize_t acpi_table_oem_revision_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%d\n", h->oem_revision);
 }
 
-ssize_t acpi_table_asl_compiler_id_show(struct config_item *cfg, char *str)
+static ssize_t acpi_table_asl_compiler_id_show(struct config_item *cfg,
+					       char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -172,8 +173,8 @@ ssize_t acpi_table_asl_compiler_id_show(struct config_item *cfg, char *str)
 	return sprintf(str, "%.*s\n", ACPI_NAME_SIZE, h->asl_compiler_id);
 }
 
-ssize_t acpi_table_asl_compiler_revision_show(struct config_item *cfg,
-					      char *str)
+static ssize_t acpi_table_asl_compiler_revision_show(struct config_item *cfg,
+						     char *str)
 {
 	struct acpi_table_header *h = get_header(cfg);
 
@@ -192,7 +193,7 @@ CONFIGFS_ATTR_RO(acpi_table_, oem_revision);
 CONFIGFS_ATTR_RO(acpi_table_, asl_compiler_id);
 CONFIGFS_ATTR_RO(acpi_table_, asl_compiler_revision);
 
-struct configfs_attribute *acpi_table_attrs[] = {
+static struct configfs_attribute *acpi_table_attrs[] = {
 	&acpi_table_attr_signature,
 	&acpi_table_attr_length,
 	&acpi_table_attr_revision,
@@ -232,7 +233,7 @@ static void acpi_table_drop_item(struct config_group *group,
 	acpi_tb_unload_table(table->index);
 }
 
-struct configfs_group_operations acpi_table_group_ops = {
+static struct configfs_group_operations acpi_table_group_ops = {
 	.make_item = acpi_table_make_item,
 	.drop_item = acpi_table_drop_item,
 };
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 5f94c35d165f..1e2a10a06b9d 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -18,7 +18,7 @@
 #include <linux/mutex.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
-#include <linux/platform_data/clk-lpss.h>
+#include <linux/platform_data/x86/clk-lpss.h>
 #include <linux/platform_data/x86/pmc_atom.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 6ecbbabf1233..eec263c9019e 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1043,9 +1043,6 @@ void __init acpi_early_init(void)
 
 	acpi_permanent_mmap = true;
 
-	/* Initialize debug output. Linux does not use ACPICA defaults */
-	acpi_dbg_level = ACPI_LV_INFO | ACPI_LV_REPAIR;
-
 #ifdef CONFIG_X86
 	/*
 	 * If the machine falls into the DMI check table,
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 1b207fca1420..d4244e7d0e38 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -1150,8 +1150,13 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps)
 	cpc_read(cpunum, nominal_reg, &nom);
 	perf_caps->nominal_perf = nom;
 
-	cpc_read(cpunum, guaranteed_reg, &guaranteed);
-	perf_caps->guaranteed_perf = guaranteed;
+	if (guaranteed_reg->type != ACPI_TYPE_BUFFER  ||
+	    IS_NULL_REG(&guaranteed_reg->cpc_entry.reg)) {
+		perf_caps->guaranteed_perf = 0;
+	} else {
+		cpc_read(cpunum, guaranteed_reg, &guaranteed);
+		perf_caps->guaranteed_perf = guaranteed;
+	}
 
 	cpc_read(cpunum, lowest_non_linear_reg, &min_nonlinear);
 	perf_caps->lowest_nonlinear_perf = min_nonlinear;
diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
index 545e91420cde..8940054d6250 100644
--- a/drivers/acpi/device_sysfs.c
+++ b/drivers/acpi/device_sysfs.c
@@ -202,11 +202,15 @@ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
 {
 	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
 	const union acpi_object *of_compatible, *obj;
+	acpi_status status;
 	int len, count;
 	int i, nval;
 	char *c;
 
-	acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
+	status = acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
 	/* DT strings are all in lower case */
 	for (c = buf.pointer; *c != '\0'; c++)
 		*c = tolower(*c);
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index e18ade5d74e9..5a389a4f4f65 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -55,6 +55,10 @@ static bool no_init_ars;
 module_param(no_init_ars, bool, 0644);
 MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
 
+static bool force_labels;
+module_param(force_labels, bool, 0444);
+MODULE_PARM_DESC(force_labels, "Opt-in to labels despite missing methods");
+
 LIST_HEAD(acpi_descs);
 DEFINE_MUTEX(acpi_desc_lock);
 
@@ -415,7 +419,7 @@ static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
 	if (call_pkg) {
 		int i;
 
-		if (nfit_mem->family != call_pkg->nd_family)
+		if (nfit_mem && nfit_mem->family != call_pkg->nd_family)
 			return -ENOTTY;
 
 		for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++)
@@ -424,6 +428,10 @@ static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
 		return call_pkg->nd_command;
 	}
 
+	/* In the !call_pkg case, bus commands == bus functions */
+	if (!nfit_mem)
+		return cmd;
+
 	/* Linux ND commands == NVDIMM_FAMILY_INTEL function numbers */
 	if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
 		return cmd;
@@ -454,17 +462,18 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 	if (cmd_rc)
 		*cmd_rc = -EINVAL;
 
+	if (cmd == ND_CMD_CALL)
+		call_pkg = buf;
+	func = cmd_to_func(nfit_mem, cmd, call_pkg);
+	if (func < 0)
+		return func;
+
 	if (nvdimm) {
 		struct acpi_device *adev = nfit_mem->adev;
 
 		if (!adev)
 			return -ENOTTY;
 
-		if (cmd == ND_CMD_CALL)
-			call_pkg = buf;
-		func = cmd_to_func(nfit_mem, cmd, call_pkg);
-		if (func < 0)
-			return func;
 		dimm_name = nvdimm_name(nvdimm);
 		cmd_name = nvdimm_cmd_name(cmd);
 		cmd_mask = nvdimm_cmd_mask(nvdimm);
@@ -475,12 +484,9 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 	} else {
 		struct acpi_device *adev = to_acpi_dev(acpi_desc);
 
-		func = cmd;
 		cmd_name = nvdimm_bus_cmd_name(cmd);
 		cmd_mask = nd_desc->cmd_mask;
-		dsm_mask = cmd_mask;
-		if (cmd == ND_CMD_CALL)
-			dsm_mask = nd_desc->bus_dsm_mask;
+		dsm_mask = nd_desc->bus_dsm_mask;
 		desc = nd_cmd_bus_desc(cmd);
 		guid = to_nfit_uuid(NFIT_DEV_BUS);
 		handle = adev->handle;
@@ -554,6 +560,13 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 		return -EINVAL;
 	}
 
+	if (out_obj->type != ACPI_TYPE_BUFFER) {
+		dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
+				dimm_name, cmd_name, out_obj->type);
+		rc = -EINVAL;
+		goto out;
+	}
+
 	if (call_pkg) {
 		call_pkg->nd_fw_size = out_obj->buffer.length;
 		memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
@@ -572,13 +585,6 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 		return 0;
 	}
 
-	if (out_obj->package.type != ACPI_TYPE_BUFFER) {
-		dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
-				dimm_name, cmd_name, out_obj->type);
-		rc = -EINVAL;
-		goto out;
-	}
-
 	dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
 			cmd_name, out_obj->buffer.length);
 	print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
@@ -1317,19 +1323,30 @@ static ssize_t scrub_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nvdimm_bus_descriptor *nd_desc;
+	struct acpi_nfit_desc *acpi_desc;
 	ssize_t rc = -ENXIO;
+	bool busy;
 
 	device_lock(dev);
 	nd_desc = dev_get_drvdata(dev);
-	if (nd_desc) {
-		struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
+	if (!nd_desc) {
+		device_unlock(dev);
+		return rc;
+	}
+	acpi_desc = to_acpi_desc(nd_desc);
 
-		mutex_lock(&acpi_desc->init_mutex);
-		rc = sprintf(buf, "%d%s", acpi_desc->scrub_count,
-				acpi_desc->scrub_busy
-				&& !acpi_desc->cancel ? "+\n" : "\n");
-		mutex_unlock(&acpi_desc->init_mutex);
+	mutex_lock(&acpi_desc->init_mutex);
+	busy = test_bit(ARS_BUSY, &acpi_desc->scrub_flags)
+		&& !test_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
+	rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, busy ? "+\n" : "\n");
+	/* Allow an admin to poll the busy state at a higher rate */
+	if (busy && capable(CAP_SYS_RAWIO) && !test_and_set_bit(ARS_POLL,
+				&acpi_desc->scrub_flags)) {
+		acpi_desc->scrub_tmo = 1;
+		mod_delayed_work(nfit_wq, &acpi_desc->dwork, HZ);
 	}
+
+	mutex_unlock(&acpi_desc->init_mutex);
 	device_unlock(dev);
 	return rc;
 }
@@ -1759,14 +1776,14 @@ static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
 
 __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
 {
+	struct device *dev = &nfit_mem->adev->dev;
 	struct nd_intel_smart smart = { 0 };
 	union acpi_object in_buf = {
-		.type = ACPI_TYPE_BUFFER,
-		.buffer.pointer = (char *) &smart,
-		.buffer.length = sizeof(smart),
+		.buffer.type = ACPI_TYPE_BUFFER,
+		.buffer.length = 0,
 	};
 	union acpi_object in_obj = {
-		.type = ACPI_TYPE_PACKAGE,
+		.package.type = ACPI_TYPE_PACKAGE,
 		.package.count = 1,
 		.package.elements = &in_buf,
 	};
@@ -1781,8 +1798,15 @@ __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
 		return;
 
 	out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
-	if (!out_obj)
+	if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER
+			|| out_obj->buffer.length < sizeof(smart)) {
+		dev_dbg(dev->parent, "%s: failed to retrieve initial health\n",
+				dev_name(dev));
+		ACPI_FREE(out_obj);
 		return;
+	}
+	memcpy(&smart, out_obj->buffer.pointer, sizeof(smart));
+	ACPI_FREE(out_obj);
 
 	if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
 		if (smart.shutdown_state)
@@ -1793,7 +1817,6 @@ __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
 		set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
 		nfit_mem->dirty_shutdown = smart.shutdown_count;
 	}
-	ACPI_FREE(out_obj);
 }
 
 static void populate_shutdown_status(struct nfit_mem *nfit_mem)
@@ -1861,9 +1884,17 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 	dev_set_drvdata(&adev_dimm->dev, nfit_mem);
 
 	/*
-	 * Until standardization materializes we need to consider 4
-	 * different command sets.  Note, that checking for function0 (bit0)
-	 * tells us if any commands are reachable through this GUID.
+	 * There are 4 "legacy" NVDIMM command sets
+	 * (NVDIMM_FAMILY_{INTEL,MSFT,HPE1,HPE2}) that were created before
+	 * an EFI working group was established to constrain this
+	 * proliferation. The nfit driver probes for the supported command
+	 * set by GUID. Note, if you're a platform developer looking to add
+	 * a new command set to this probe, consider using an existing set,
+	 * or otherwise seek approval to publish the command set at
+	 * http://www.uefi.org/RFIC_LIST.
+	 *
+	 * Note, that checking for function0 (bit0) tells us if any commands
+	 * are reachable through this GUID.
 	 */
 	for (i = 0; i <= NVDIMM_FAMILY_MAX; i++)
 		if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1))
@@ -1886,6 +1917,8 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 			dsm_mask &= ~(1 << 8);
 	} else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) {
 		dsm_mask = 0xffffffff;
+	} else if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) {
+		dsm_mask = 0x1f;
 	} else {
 		dev_dbg(dev, "unknown dimm command family\n");
 		nfit_mem->family = -1;
@@ -1915,18 +1948,32 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 		| 1 << ND_CMD_SET_CONFIG_DATA;
 	if (family == NVDIMM_FAMILY_INTEL
 			&& (dsm_mask & label_mask) == label_mask)
-		return 0;
+		/* skip _LS{I,R,W} enabling */;
+	else {
+		if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
+				&& acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
+			dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
+			set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
+		}
 
-	if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
-			&& acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
-		dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
-		set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
-	}
+		if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
+				&& acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
+			dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
+			set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
+		}
 
-	if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
-			&& acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
-		dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
-		set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
+		/*
+		 * Quirk read-only label configurations to preserve
+		 * access to label-less namespaces by default.
+		 */
+		if (!test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
+				&& !force_labels) {
+			dev_dbg(dev, "%s: No _LSW, disable labels\n",
+					dev_name(&adev_dimm->dev));
+			clear_bit(NFIT_MEM_LSR, &nfit_mem->flags);
+		} else
+			dev_dbg(dev, "%s: Force enable labels\n",
+					dev_name(&adev_dimm->dev));
 	}
 
 	populate_shutdown_status(nfit_mem);
@@ -2027,6 +2074,10 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
 			cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK;
 		}
 
+		/* Quirk to ignore LOCAL for labels on HYPERV DIMMs */
+		if (nfit_mem->family == NVDIMM_FAMILY_HYPERV)
+			set_bit(NDD_NOBLK, &flags);
+
 		if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
 			set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
 			set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask);
@@ -2050,7 +2101,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
 		if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
 			continue;
 
-		dev_info(acpi_desc->dev, "%s flags:%s%s%s%s%s\n",
+		dev_err(acpi_desc->dev, "Error found in NVDIMM %s flags:%s%s%s%s%s\n",
 				nvdimm_name(nvdimm),
 		  mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
 		  mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
@@ -2641,7 +2692,10 @@ static int ars_start(struct acpi_nfit_desc *acpi_desc,
 
 	if (rc < 0)
 		return rc;
-	return cmd_rc;
+	if (cmd_rc < 0)
+		return cmd_rc;
+	set_bit(ARS_VALID, &acpi_desc->scrub_flags);
+	return 0;
 }
 
 static int ars_continue(struct acpi_nfit_desc *acpi_desc)
@@ -2651,11 +2705,11 @@ static int ars_continue(struct acpi_nfit_desc *acpi_desc)
 	struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
 	struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
 
-	memset(&ars_start, 0, sizeof(ars_start));
-	ars_start.address = ars_status->restart_address;
-	ars_start.length = ars_status->restart_length;
-	ars_start.type = ars_status->type;
-	ars_start.flags = acpi_desc->ars_start_flags;
+	ars_start = (struct nd_cmd_ars_start) {
+		.address = ars_status->restart_address,
+		.length = ars_status->restart_length,
+		.type = ars_status->type,
+	};
 	rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
 			sizeof(ars_start), &cmd_rc);
 	if (rc < 0)
@@ -2734,6 +2788,17 @@ static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc)
 	 */
 	if (ars_status->out_length < 44)
 		return 0;
+
+	/*
+	 * Ignore potentially stale results that are only refreshed
+	 * after a start-ARS event.
+	 */
+	if (!test_and_clear_bit(ARS_VALID, &acpi_desc->scrub_flags)) {
+		dev_dbg(acpi_desc->dev, "skip %d stale records\n",
+				ars_status->num_records);
+		return 0;
+	}
+
 	for (i = 0; i < ars_status->num_records; i++) {
 		/* only process full records */
 		if (ars_status->out_length
@@ -2891,11 +2956,15 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
 	ndr_desc->res = &res;
 	ndr_desc->provider_data = nfit_spa;
 	ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
-	if (spa->flags & ACPI_NFIT_PROXIMITY_VALID)
+	if (spa->flags & ACPI_NFIT_PROXIMITY_VALID) {
 		ndr_desc->numa_node = acpi_map_pxm_to_online_node(
 						spa->proximity_domain);
-	else
+		ndr_desc->target_node = acpi_map_pxm_to_node(
+				spa->proximity_domain);
+	} else {
 		ndr_desc->numa_node = NUMA_NO_NODE;
+		ndr_desc->target_node = NUMA_NO_NODE;
+	}
 
 	/*
 	 * Persistence domain bits are hierarchical, if
@@ -3004,14 +3073,16 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc,
 {
 	int rc;
 
-	if (no_init_ars || test_bit(ARS_FAILED, &nfit_spa->ars_state))
+	if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
 		return acpi_nfit_register_region(acpi_desc, nfit_spa);
 
 	set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
-	set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
+	if (!no_init_ars)
+		set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
 
 	switch (acpi_nfit_query_poison(acpi_desc)) {
 	case 0:
+	case -ENOSPC:
 	case -EAGAIN:
 		rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
 		/* shouldn't happen, try again later */
@@ -3036,7 +3107,6 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc,
 		break;
 	case -EBUSY:
 	case -ENOMEM:
-	case -ENOSPC:
 		/*
 		 * BIOS was using ARS, wait for it to complete (or
 		 * resources to become available) and then perform our
@@ -3071,7 +3141,7 @@ static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc,
 
 	lockdep_assert_held(&acpi_desc->init_mutex);
 
-	if (acpi_desc->cancel)
+	if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags))
 		return 0;
 
 	if (query_rc == -EBUSY) {
@@ -3145,7 +3215,7 @@ static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo)
 {
 	lockdep_assert_held(&acpi_desc->init_mutex);
 
-	acpi_desc->scrub_busy = 1;
+	set_bit(ARS_BUSY, &acpi_desc->scrub_flags);
 	/* note this should only be set from within the workqueue */
 	if (tmo)
 		acpi_desc->scrub_tmo = tmo;
@@ -3161,7 +3231,7 @@ static void notify_ars_done(struct acpi_nfit_desc *acpi_desc)
 {
 	lockdep_assert_held(&acpi_desc->init_mutex);
 
-	acpi_desc->scrub_busy = 0;
+	clear_bit(ARS_BUSY, &acpi_desc->scrub_flags);
 	acpi_desc->scrub_count++;
 	if (acpi_desc->scrub_count_state)
 		sysfs_notify_dirent(acpi_desc->scrub_count_state);
@@ -3182,6 +3252,7 @@ static void acpi_nfit_scrub(struct work_struct *work)
 	else
 		notify_ars_done(acpi_desc);
 	memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
+	clear_bit(ARS_POLL, &acpi_desc->scrub_flags);
 	mutex_unlock(&acpi_desc->init_mutex);
 }
 
@@ -3216,6 +3287,7 @@ static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
 	struct nfit_spa *nfit_spa;
 	int rc;
 
+	set_bit(ARS_VALID, &acpi_desc->scrub_flags);
 	list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
 		switch (nfit_spa_type(nfit_spa->spa)) {
 		case NFIT_SPA_VOLATILE:
@@ -3450,7 +3522,7 @@ int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
 	struct nfit_spa *nfit_spa;
 
 	mutex_lock(&acpi_desc->init_mutex);
-	if (acpi_desc->cancel) {
+	if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) {
 		mutex_unlock(&acpi_desc->init_mutex);
 		return 0;
 	}
@@ -3529,7 +3601,7 @@ void acpi_nfit_shutdown(void *data)
 	mutex_unlock(&acpi_desc_lock);
 
 	mutex_lock(&acpi_desc->init_mutex);
-	acpi_desc->cancel = 1;
+	set_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
 	cancel_delayed_work_sync(&acpi_desc->dwork);
 	mutex_unlock(&acpi_desc->init_mutex);
 
@@ -3729,6 +3801,7 @@ static __init int nfit_init(void)
 	guid_parse(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
 	guid_parse(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
 	guid_parse(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
+	guid_parse(UUID_NFIT_DIMM_N_HYPERV, &nfit_uuid[NFIT_DEV_DIMM_N_HYPERV]);
 
 	nfit_wq = create_singlethread_workqueue("nfit");
 	if (!nfit_wq)
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index 33691aecfcee..2f8cf2a11e3b 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -34,11 +34,14 @@
 /* https://msdn.microsoft.com/library/windows/hardware/mt604741 */
 #define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05"
 
+/* http://www.uefi.org/RFIC_LIST (see "Virtual NVDIMM 0x1901") */
+#define UUID_NFIT_DIMM_N_HYPERV "5746c5f2-a9a2-4264-ad0e-e4ddc9e09e80"
+
 #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
 		| ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
 		| ACPI_NFIT_MEM_NOT_ARMED | ACPI_NFIT_MEM_MAP_FAILED)
 
-#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_MSFT
+#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_HYPERV
 
 #define NVDIMM_STANDARD_CMDMASK \
 (1 << ND_CMD_SMART | 1 << ND_CMD_SMART_THRESHOLD | 1 << ND_CMD_DIMM_FLAGS \
@@ -94,6 +97,7 @@ enum nfit_uuids {
 	NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
 	NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
 	NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT,
+	NFIT_DEV_DIMM_N_HYPERV = NVDIMM_FAMILY_HYPERV,
 	NFIT_SPA_VOLATILE,
 	NFIT_SPA_PM,
 	NFIT_SPA_DCR,
@@ -210,6 +214,13 @@ struct nfit_mem {
 	int family;
 };
 
+enum scrub_flags {
+	ARS_BUSY,
+	ARS_CANCEL,
+	ARS_VALID,
+	ARS_POLL,
+};
+
 struct acpi_nfit_desc {
 	struct nvdimm_bus_descriptor nd_desc;
 	struct acpi_table_header acpi_header;
@@ -223,7 +234,6 @@ struct acpi_nfit_desc {
 	struct list_head idts;
 	struct nvdimm_bus *nvdimm_bus;
 	struct device *dev;
-	u8 ars_start_flags;
 	struct nd_cmd_ars_status *ars_status;
 	struct nfit_spa *scrub_spa;
 	struct delayed_work dwork;
@@ -232,8 +242,7 @@ struct acpi_nfit_desc {
 	unsigned int max_ars;
 	unsigned int scrub_count;
 	unsigned int scrub_mode;
-	unsigned int scrub_busy:1;
-	unsigned int cancel:1;
+	unsigned long scrub_flags;
 	unsigned long dimm_cmd_force_en;
 	unsigned long bus_cmd_force_en;
 	unsigned long bus_nfit_cmd_force_en;
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 7bbbf8256a41..867f6e3f2b4f 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -84,6 +84,7 @@ int acpi_map_pxm_to_node(int pxm)
 
 	return node;
 }
+EXPORT_SYMBOL(acpi_map_pxm_to_node);
 
 /**
  * acpi_map_pxm_to_online_node - Map proximity ID to online node
diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index ad31c50de3be..065c4fc245d1 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c
@@ -209,6 +209,9 @@ static int acpi_pptt_leaf_node(struct acpi_table_header *table_hdr,
 	struct acpi_pptt_processor *cpu_node;
 	u32 proc_sz;
 
+	if (table_hdr->revision > 1)
+		return (node->flags & ACPI_PPTT_ACPI_LEAF_NODE);
+
 	table_end = (unsigned long)table_hdr + table_hdr->length;
 	node_entry = ACPI_PTR_DIFF(node, table_hdr);
 	entry = ACPI_ADD_PTR(struct acpi_subtable_header, table_hdr,
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5efd4219f112..446c959a8f08 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1545,6 +1545,7 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 	 */
 	static const struct acpi_device_id i2c_multi_instantiate_ids[] = {
 		{"BSG1160", },
+		{"BSG2150", },
 		{"INT33FE", },
 		{"INT3515", },
 		{}
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 41324f0b1bee..fa76f5e41b5c 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -648,26 +648,29 @@ static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 	}
 }
 
-static int get_status(u32 index, acpi_event_status *status,
+static int get_status(u32 index, acpi_event_status *ret,
 		      acpi_handle *handle)
 {
-	int result;
+	acpi_status status;
 
 	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 		return -EINVAL;
 
 	if (index < num_gpes) {
-		result = acpi_get_gpe_device(index, handle);
-		if (result) {
+		status = acpi_get_gpe_device(index, handle);
+		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 					"Invalid GPE 0x%x", index));
-			return result;
+			return -ENXIO;
 		}
-		result = acpi_get_gpe_status(*handle, index, status);
-	} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
-		result = acpi_get_event_status(index - num_gpes, status);
+		status = acpi_get_gpe_status(*handle, index, ret);
+	} else {
+		status = acpi_get_event_status(index - num_gpes, ret);
+	}
+	if (ACPI_FAILURE(status))
+		return -EIO;
 
-	return result;
+	return 0;
 }
 
 static ssize_t counter_show(struct kobject *kobj,
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 78db97687f26..c4b06cc075f9 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -800,6 +800,7 @@ bool acpi_dev_present(const char *hid, const char *uid, s64 hrv)
 	match.hrv = hrv;
 
 	dev = bus_find_device(&acpi_bus_type, NULL, &match, acpi_dev_match_cb);
+	put_device(dev);
 	return !!dev;
 }
 EXPORT_SYMBOL(acpi_dev_present);