Merge groveronline.com:/root/bk/linux-2.5

into groveronline.com:/root/bk/linux-acpi

drivers/acpi/acpi_ksyms.c

@@ -144,8 +144,8 @@ EXPORT_SYMBOL(acpi_bus_unregister_driver);
 #include <linux/pci.h>
 extern int acpi_pci_irq_enable(struct pci_dev *dev);
 EXPORT_SYMBOL(acpi_pci_irq_enable);
-extern int acpi_pci_irq_lookup (int segment, int bus, int device, int pin);
-EXPORT_SYMBOL(acpi_pci_irq_lookup);
+EXPORT_SYMBOL(acpi_pci_register_driver);
+EXPORT_SYMBOL(acpi_pci_unregister_driver);
 #endif /*CONFIG_ACPI_PCI */
 
 #ifdef CONFIG_ACPI_EC

drivers/acpi/osl.c

@@ -38,6 +38,7 @@
 #include <acpi/acpi.h>
 #include <asm/io.h>
 #include <acpi/acpi_bus.h>
+#include <asm/uaccess.h>
 
 #ifdef CONFIG_ACPI_EFI
 #include <linux/efi.h>
@@ -948,19 +949,22 @@ acpi_os_get_line(char *buffer)
 	return 0;
 }
 
-/*
- * We just have to assume we're dealing with valid memory
- */
-
+/* Assumes no unreadable holes inbetween */
 BOOLEAN
 acpi_os_readable(void *ptr, u32 len)
 {
+#if defined(__i386__) || defined(__x86_64__) 
+	char tmp;
+	return !__get_user(tmp, (char *)ptr) && !__get_user(tmp, (char *)ptr + len - 1);
+#endif
 	return 1;
 }
 
 BOOLEAN
 acpi_os_writable(void *ptr, u32 len)
 {
+	/* could do dummy write (racy) or a kernel page table lookup.
+	   The later may be difficult at early boot when kmap doesn't work yet. */
 	return 1;
 }
 

drivers/acpi/pci_irq.c

@@ -229,22 +229,20 @@ acpi_pci_irq_add_prt (
                           PCI Interrupt Routing Support
    -------------------------------------------------------------------------- */
 
-int
-acpi_pci_irq_lookup (
-	int			segment,
-	int			bus,
-	int			device,
-	int			pin)
+static int
+acpi_pci_irq_lookup (struct pci_bus *bus, int device, int pin)
 {
 	struct acpi_prt_entry	*entry = NULL;
+	int segment = pci_domain_nr(bus);
+	int bus_nr = bus->number;
 
 	ACPI_FUNCTION_TRACE("acpi_pci_irq_lookup");
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, 
 		"Searching for PRT entry for %02x:%02x:%02x[%c]\n", 
-		segment, bus, device, ('A' + pin)));
+		segment, bus_nr, device, ('A' + pin)));
 
-	entry = acpi_pci_irq_find_prt_entry(segment, bus, device, pin); 
+	entry = acpi_pci_irq_find_prt_entry(segment, bus_nr, device, pin); 
 	if (!entry) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PRT entry not found\n"));
 		return_VALUE(0);
@@ -288,7 +286,8 @@ acpi_pci_irq_derive (
 	while (!irq && bridge->bus->self) {
 		pin = (pin + PCI_SLOT(bridge->devfn)) % 4;
 		bridge = bridge->bus->self;
-		irq = acpi_pci_irq_lookup(0, bridge->bus->number, PCI_SLOT(bridge->devfn), pin);
+		irq = acpi_pci_irq_lookup(bridge->bus,
+				PCI_SLOT(bridge->devfn), pin);
 	}
 
 	if (!irq) {
@@ -331,7 +330,7 @@ acpi_pci_irq_enable (
 	 * First we check the PCI IRQ routing table (PRT) for an IRQ.  PRT
 	 * values override any BIOS-assigned IRQs set during boot.
 	 */
- 	irq = acpi_pci_irq_lookup(0, dev->bus->number, PCI_SLOT(dev->devfn), pin);
+ 	irq = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin);
  
 	/*
 	 * If no PRT entry was found, we'll try to derive an IRQ from the

drivers/acpi/pci_root.c

@@ -59,17 +59,63 @@ static struct acpi_driver acpi_pci_root_driver = {
 			},
 };
 
- struct acpi_pci_root {
+struct acpi_pci_root {
 	struct list_head	node;
 	acpi_handle		handle;
 	struct acpi_pci_id	id;
 	struct pci_bus		*bus;
 	u64			mem_tra;
 	u64			io_tra;
- };
+};
 
 struct list_head		acpi_pci_roots;
 
+static struct acpi_pci_driver *sub_driver;
+
+int acpi_pci_register_driver(struct acpi_pci_driver *driver)
+{
+	int n = 0;
+	struct list_head *entry;
+
+	struct acpi_pci_driver **pptr = &sub_driver;
+	while (*pptr)
+		pptr = &(*pptr)->next;
+	*pptr = driver;
+
+	if (!driver->add)
+		return 0;
+
+	list_for_each(entry, &acpi_pci_roots) {
+		struct acpi_pci_root *root;
+		root = list_entry(entry, struct acpi_pci_root, node);
+		driver->add(root->handle);
+		n++;
+	}
+
+	return n;
+}
+
+void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
+{
+	struct list_head *entry;
+
+	struct acpi_pci_driver **pptr = &sub_driver;
+	while (*pptr) {
+		if (*pptr != driver)
+			continue;
+		*pptr = (*pptr)->next;
+		break;
+	}
+
+	if (!driver->remove)
+		return;
+
+	list_for_each(entry, &acpi_pci_roots) {
+		struct acpi_pci_root *root;
+		root = list_entry(entry, struct acpi_pci_root, node);
+		driver->remove(root->handle);
+	}
+}
 
 void
 acpi_pci_get_translations (

drivers/acpi/sleep/main.c

@@ -214,6 +214,10 @@ acpi_suspend (
 {
 	acpi_status status;
 
+	/* Suspend is hard to get right on SMP. */
+	if (num_online_cpus() != 1)
+		return AE_ERROR;
+
 	/* get out if state is invalid */
 	if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5)
 		return AE_ERROR;
@@ -226,7 +230,10 @@ acpi_suspend (
 	 * TBD: S1 can be done without device_suspend.  Make a CONFIG_XX
 	 * to handle however when S1 failed without device_suspend.
 	 */
-	freeze_processes();		/* device_suspend needs processes to be stopped */
+	if (freeze_processes()) {
+		thaw_processes();
+		return AE_ERROR;		/* device_suspend needs processes to be stopped */
+	}
 
 	/* do we have a wakeup address for S2 and S3? */
 	/* Here, we support only S4BIOS, those we set the wakeup address */

drivers/acpi/tables.c

@@ -56,7 +56,7 @@ static char *acpi_table_signatures[ACPI_TABLE_COUNT] = {
 	[ACPI_SRAT]		= "SRAT",
 	[ACPI_SSDT]		= "SSDT",
 	[ACPI_SPMI]		= "SPMI",
-	[ACPI_HPET]		= "HPET"
+	[ACPI_HPET]		= "HPET",
 };
 
 /* System Description Table (RSDT/XSDT) */

drivers/acpi/thermal.c

@@ -430,7 +430,7 @@ acpi_thermal_call_usermode (
 	ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode");
 
 	if (!path)
-		return_VALUE(-EINVAL);;
+		return_VALUE(-EINVAL);
 
 	argv[0] = path;
 

include/linux/acpi.h

@@ -401,6 +401,15 @@ struct pci_dev;
 int acpi_pci_irq_enable (struct pci_dev *dev);
 int acpi_pci_irq_init (void);
 
+struct acpi_pci_driver {
+	struct acpi_pci_driver *next;
+	int (*add)(acpi_handle *handle);
+	void (*remove)(acpi_handle *handle);
+};
+
+int acpi_pci_register_driver(struct acpi_pci_driver *driver);
+void acpi_pci_unregister_driver(struct acpi_pci_driver *driver);
+
 #endif /*CONFIG_ACPI_PCI*/
 
 #ifdef CONFIG_ACPI_EC