Merge branches 'acpi-pci', 'acpi-misc' and 'acpi-tools'

* acpi-pci:
  ACPI,PCI,IRQ: remove SCI penalize function
  ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init()
  ACPI,PCI,IRQ: reduce static IRQ array size to 16
  ACPI,PCI,IRQ: reduce resource requirements

* acpi-misc:
  ACPI / sysfs: fix error code in get_status()
  ACPI / device_sysfs: Clean up checkpatch errors
  ACPI / device_sysfs: Change _SUN and _STA show functions error return to EIO
  ACPI / device_sysfs: Add sysfs support for _HRV hardware revision
  arm64: defconfig: Enable ACPI
  ACPI / ARM64: Remove EXPERT dependency for ACPI on ARM64
  ACPI / ARM64: Don't enable ACPI by default on ARM64
  acer-wmi: Use acpi_dev_found()
  eeepc-wmi: Use acpi_dev_found()
  ACPI / utils: Rename acpi_dev_present()

* acpi-tools:
  tools/power/acpi: close file only if it is open

Author: rafaeljw

arch/arm64/configs/defconfig

@@ -264,6 +264,7 @@ CONFIG_PHY_RCAR_GEN3_USB2=y
 CONFIG_PHY_HI6220_USB=y
 CONFIG_PHY_XGENE=y
 CONFIG_ARM_SCPI_PROTOCOL=y
+CONFIG_ACPI=y
 CONFIG_EXT2_FS=y
 CONFIG_EXT3_FS=y
 CONFIG_FANOTIFY=y

arch/x86/kernel/acpi/boot.c

@@ -445,7 +445,6 @@ static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger,
 		polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 
 	mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
-	acpi_penalize_sci_irq(bus_irq, trigger, polarity);
 
 	/*
 	 * stash over-ride to indicate we've been here

arch/x86/pci/acpi.c

@@ -396,7 +396,6 @@ int __init pci_acpi_init(void)
 		return -ENODEV;
 
 	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
-	acpi_irq_penalty_init();
 	pcibios_enable_irq = acpi_pci_irq_enable;
 	pcibios_disable_irq = acpi_pci_irq_disable;
 	x86_init.pci.init_irq = x86_init_noop;

drivers/acpi/Kconfig

@@ -5,10 +5,10 @@
 menuconfig ACPI
 	bool "ACPI (Advanced Configuration and Power Interface) Support"
 	depends on !IA64_HP_SIM
-	depends on IA64 || X86 || (ARM64 && EXPERT)
+	depends on IA64 || X86 || ARM64
 	depends on PCI
 	select PNP
-	default y
+	default y if (IA64 || X86)
 	help
 	  Advanced Configuration and Power Interface (ACPI) support for 
 	  Linux requires an ACPI-compliant platform (hardware/firmware),

drivers/acpi/device_sysfs.c

@@ -35,7 +35,7 @@ static ssize_t acpi_object_path(acpi_handle handle, char *buf)
 	if (result)
 		return result;
 
-	result = sprintf(buf, "%s\n", (char*)path.pointer);
+	result = sprintf(buf, "%s\n", (char *)path.pointer);
 	kfree(path.pointer);
 	return result;
 }
@@ -333,7 +333,8 @@ int acpi_device_modalias(struct device *dev, char *buf, int size)
 EXPORT_SYMBOL_GPL(acpi_device_modalias);
 
 static ssize_t
-acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
+acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
 	return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
 }
 static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
@@ -397,7 +398,8 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
 static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
 
 static ssize_t
-acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
+acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
 	struct acpi_device *acpi_dev = to_acpi_device(dev);
 
 	return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev));
@@ -467,12 +469,27 @@ acpi_device_sun_show(struct device *dev, struct device_attribute *attr,
 
 	status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun);
 	if (ACPI_FAILURE(status))
-		return -ENODEV;
+		return -EIO;
 
 	return sprintf(buf, "%llu\n", sun);
 }
 static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
 
+static ssize_t
+acpi_device_hrv_show(struct device *dev, struct device_attribute *attr,
+		     char *buf) {
+	struct acpi_device *acpi_dev = to_acpi_device(dev);
+	acpi_status status;
+	unsigned long long hrv;
+
+	status = acpi_evaluate_integer(acpi_dev->handle, "_HRV", NULL, &hrv);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	return sprintf(buf, "%llu\n", hrv);
+}
+static DEVICE_ATTR(hrv, 0444, acpi_device_hrv_show, NULL);
+
 static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 				char *buf) {
 	struct acpi_device *acpi_dev = to_acpi_device(dev);
@@ -481,7 +498,7 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 
 	status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta);
 	if (ACPI_FAILURE(status))
-		return -ENODEV;
+		return -EIO;
 
 	return sprintf(buf, "%llu\n", sta);
 }
@@ -541,16 +558,22 @@ int acpi_device_setup_files(struct acpi_device *dev)
 			goto end;
 	}
 
+	if (acpi_has_method(dev->handle, "_HRV")) {
+		result = device_create_file(&dev->dev, &dev_attr_hrv);
+		if (result)
+			goto end;
+	}
+
 	if (acpi_has_method(dev->handle, "_STA")) {
 		result = device_create_file(&dev->dev, &dev_attr_status);
 		if (result)
 			goto end;
 	}
 
-        /*
-         * If device has _EJ0, 'eject' file is created that is used to trigger
-         * hot-removal function from userland.
-         */
+	/*
+	 * If device has _EJ0, 'eject' file is created that is used to trigger
+	 * hot-removal function from userland.
+	 */
 	if (acpi_has_method(dev->handle, "_EJ0")) {
 		result = device_create_file(&dev->dev, &dev_attr_eject);
 		if (result)
@@ -604,6 +627,9 @@ void acpi_device_remove_files(struct acpi_device *dev)
 	if (acpi_has_method(dev->handle, "_SUN"))
 		device_remove_file(&dev->dev, &dev_attr_sun);
 
+	if (acpi_has_method(dev->handle, "_HRV"))
+		device_remove_file(&dev->dev, &dev_attr_hrv);
+
 	if (dev->pnp.unique_id)
 		device_remove_file(&dev->dev, &dev_attr_uid);
 	if (dev->pnp.type.bus_address)

drivers/acpi/pci_link.c

@@ -36,6 +36,7 @@
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/acpi.h>
+#include <linux/irq.h>
 
 #include "internal.h"
 
@@ -437,17 +438,15 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
  * enabled system.
  */
 
-#define ACPI_MAX_IRQS		256
-#define ACPI_MAX_ISA_IRQ	16
+#define ACPI_MAX_ISA_IRQS	16
 
-#define PIRQ_PENALTY_PCI_AVAILABLE	(0)
 #define PIRQ_PENALTY_PCI_POSSIBLE	(16*16)
 #define PIRQ_PENALTY_PCI_USING		(16*16*16)
 #define PIRQ_PENALTY_ISA_TYPICAL	(16*16*16*16)
 #define PIRQ_PENALTY_ISA_USED		(16*16*16*16*16)
 #define PIRQ_PENALTY_ISA_ALWAYS		(16*16*16*16*16*16)
 
-static int acpi_irq_penalty[ACPI_MAX_IRQS] = {
+static int acpi_isa_irq_penalty[ACPI_MAX_ISA_IRQS] = {
 	PIRQ_PENALTY_ISA_ALWAYS,	/* IRQ0 timer */
 	PIRQ_PENALTY_ISA_ALWAYS,	/* IRQ1 keyboard */
 	PIRQ_PENALTY_ISA_ALWAYS,	/* IRQ2 cascade */
@@ -457,49 +456,68 @@ static int acpi_irq_penalty[ACPI_MAX_IRQS] = {
 	PIRQ_PENALTY_ISA_TYPICAL,	/* IRQ6 */
 	PIRQ_PENALTY_ISA_TYPICAL,	/* IRQ7 parallel, spurious */
 	PIRQ_PENALTY_ISA_TYPICAL,	/* IRQ8 rtc, sometimes */
-	PIRQ_PENALTY_PCI_AVAILABLE,	/* IRQ9  PCI, often acpi */
-	PIRQ_PENALTY_PCI_AVAILABLE,	/* IRQ10 PCI */
-	PIRQ_PENALTY_PCI_AVAILABLE,	/* IRQ11 PCI */
+	0,				/* IRQ9  PCI, often acpi */
+	0,				/* IRQ10 PCI */
+	0,				/* IRQ11 PCI */
 	PIRQ_PENALTY_ISA_USED,		/* IRQ12 mouse */
 	PIRQ_PENALTY_ISA_USED,		/* IRQ13 fpe, sometimes */
 	PIRQ_PENALTY_ISA_USED,		/* IRQ14 ide0 */
 	PIRQ_PENALTY_ISA_USED,		/* IRQ15 ide1 */
 	/* >IRQ15 */
 };
 
-int __init acpi_irq_penalty_init(void)
+static int acpi_irq_pci_sharing_penalty(int irq)
 {
 	struct acpi_pci_link *link;
-	int i;
+	int penalty = 0;
 
-	/*
-	 * Update penalties to facilitate IRQ balancing.
-	 */
 	list_for_each_entry(link, &acpi_link_list, list) {
-
 		/*
-		 * reflect the possible and active irqs in the penalty table --
-		 * useful for breaking ties.
+		 * If a link is active, penalize its IRQ heavily
+		 * so we try to choose a different IRQ.
 		 */
-		if (link->irq.possible_count) {
-			int penalty =
-			    PIRQ_PENALTY_PCI_POSSIBLE /
-			    link->irq.possible_count;
-
-			for (i = 0; i < link->irq.possible_count; i++) {
-				if (link->irq.possible[i] < ACPI_MAX_ISA_IRQ)
-					acpi_irq_penalty[link->irq.
-							 possible[i]] +=
-					    penalty;
-			}
-
-		} else if (link->irq.active) {
-			acpi_irq_penalty[link->irq.active] +=
-			    PIRQ_PENALTY_PCI_POSSIBLE;
+		if (link->irq.active && link->irq.active == irq)
+			penalty += PIRQ_PENALTY_PCI_USING;
+		else {
+			int i;
+
+			/*
+			 * If a link is inactive, penalize the IRQs it
+			 * might use, but not as severely.
+			 */
+			for (i = 0; i < link->irq.possible_count; i++)
+				if (link->irq.possible[i] == irq)
+					penalty += PIRQ_PENALTY_PCI_POSSIBLE /
+						link->irq.possible_count;
 		}
 	}
 
-	return 0;
+	return penalty;
+}
+
+static int acpi_irq_get_penalty(int irq)
+{
+	int penalty = 0;
+
+	if (irq < ACPI_MAX_ISA_IRQS)
+		penalty += acpi_isa_irq_penalty[irq];
+
+	/*
+	* Penalize IRQ used by ACPI SCI. If ACPI SCI pin attributes conflict
+	* with PCI IRQ attributes, mark ACPI SCI as ISA_ALWAYS so it won't be
+	* use for PCI IRQs.
+	*/
+	if (irq == acpi_gbl_FADT.sci_interrupt) {
+		u32 type = irq_get_trigger_type(irq) & IRQ_TYPE_SENSE_MASK;
+
+		if (type != IRQ_TYPE_LEVEL_LOW)
+			penalty += PIRQ_PENALTY_ISA_ALWAYS;
+		else
+			penalty += PIRQ_PENALTY_PCI_USING;
+	}
+
+	penalty += acpi_irq_pci_sharing_penalty(irq);
+	return penalty;
 }
 
 static int acpi_irq_balance = -1;	/* 0: static, 1: balance */
@@ -547,12 +565,12 @@ static int acpi_pci_link_allocate(struct acpi_pci_link *link)
 		 * the use of IRQs 9, 10, 11, and >15.
 		 */
 		for (i = (link->irq.possible_count - 1); i >= 0; i--) {
-			if (acpi_irq_penalty[irq] >
-			    acpi_irq_penalty[link->irq.possible[i]])
+			if (acpi_irq_get_penalty(irq) >
+			    acpi_irq_get_penalty(link->irq.possible[i]))
 				irq = link->irq.possible[i];
 		}
 	}
-	if (acpi_irq_penalty[irq] >= PIRQ_PENALTY_ISA_ALWAYS) {
+	if (acpi_irq_get_penalty(irq) >= PIRQ_PENALTY_ISA_ALWAYS) {
 		printk(KERN_ERR PREFIX "No IRQ available for %s [%s]. "
 			    "Try pci=noacpi or acpi=off\n",
 			    acpi_device_name(link->device),
@@ -568,7 +586,6 @@ static int acpi_pci_link_allocate(struct acpi_pci_link *link)
 			    acpi_device_bid(link->device));
 		return -ENODEV;
 	} else {
-		acpi_irq_penalty[link->irq.active] += PIRQ_PENALTY_PCI_USING;
 		printk(KERN_WARNING PREFIX "%s [%s] enabled at IRQ %d\n",
 		       acpi_device_name(link->device),
 		       acpi_device_bid(link->device), link->irq.active);
@@ -778,7 +795,7 @@ static void acpi_pci_link_remove(struct acpi_device *device)
 }
 
 /*
- * modify acpi_irq_penalty[] from cmdline
+ * modify acpi_isa_irq_penalty[] from cmdline
  */
 static int __init acpi_irq_penalty_update(char *str, int used)
 {
@@ -787,23 +804,24 @@ static int __init acpi_irq_penalty_update(char *str, int used)
 	for (i = 0; i < 16; i++) {
 		int retval;
 		int irq;
+		int new_penalty;
 
 		retval = get_option(&str, &irq);
 
 		if (!retval)
 			break;	/* no number found */
 
-		if (irq < 0)
-			continue;
-
-		if (irq >= ARRAY_SIZE(acpi_irq_penalty))
+		/* see if this is a ISA IRQ */
+		if ((irq < 0) || (irq >= ACPI_MAX_ISA_IRQS))
 			continue;
 
 		if (used)
-			acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_USED;
+			new_penalty = acpi_irq_get_penalty(irq) +
+					PIRQ_PENALTY_ISA_USED;
 		else
-			acpi_irq_penalty[irq] = PIRQ_PENALTY_PCI_AVAILABLE;
+			new_penalty = 0;
 
+		acpi_isa_irq_penalty[irq] = new_penalty;
 		if (retval != 2)	/* no next number */
 			break;
 	}
@@ -819,34 +837,15 @@ static int __init acpi_irq_penalty_update(char *str, int used)
  */
 void acpi_penalize_isa_irq(int irq, int active)
 {
-	if (irq >= 0 && irq < ARRAY_SIZE(acpi_irq_penalty)) {
-		if (active)
-			acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_USED;
-		else
-			acpi_irq_penalty[irq] += PIRQ_PENALTY_PCI_USING;
-	}
+	if ((irq >= 0) && (irq < ARRAY_SIZE(acpi_isa_irq_penalty)))
+		acpi_isa_irq_penalty[irq] = acpi_irq_get_penalty(irq) +
+			active ? PIRQ_PENALTY_ISA_USED : PIRQ_PENALTY_PCI_USING;
 }
 
 bool acpi_isa_irq_available(int irq)
 {
-	return irq >= 0 && (irq >= ARRAY_SIZE(acpi_irq_penalty) ||
-			    acpi_irq_penalty[irq] < PIRQ_PENALTY_ISA_ALWAYS);
-}
-
-/*
- * Penalize IRQ used by ACPI SCI. If ACPI SCI pin attributes conflict with
- * PCI IRQ attributes, mark ACPI SCI as ISA_ALWAYS so it won't be use for
- * PCI IRQs.
- */
-void acpi_penalize_sci_irq(int irq, int trigger, int polarity)
-{
-	if (irq >= 0 && irq < ARRAY_SIZE(acpi_irq_penalty)) {
-		if (trigger != ACPI_MADT_TRIGGER_LEVEL ||
-		    polarity != ACPI_MADT_POLARITY_ACTIVE_LOW)
-			acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_ALWAYS;
-		else
-			acpi_irq_penalty[irq] += PIRQ_PENALTY_PCI_USING;
-	}
+	return irq >= 0 && (irq >= ARRAY_SIZE(acpi_isa_irq_penalty) ||
+		    acpi_irq_get_penalty(irq) < PIRQ_PENALTY_ISA_ALWAYS);
 }
 
 /*

drivers/acpi/sysfs.c

@@ -555,23 +555,22 @@ static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 static int get_status(u32 index, acpi_event_status *status,
 		      acpi_handle *handle)
 {
-	int result = 0;
+	int result;
 
 	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
-		goto end;
+		return -EINVAL;
 
 	if (index < num_gpes) {
 		result = acpi_get_gpe_device(index, handle);
 		if (result) {
 			ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 					"Invalid GPE 0x%x", index));
-			goto end;
+			return result;
 		}
 		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);
 
-end:
 	return result;
 }