Merge branches 'misc', 'eeepc-laptop' and 'bugzilla-14445' into release

drivers/acpi/acpica/acconfig.h

@@ -103,9 +103,9 @@
 
 #define ACPI_MAX_REFERENCE_COUNT        0x1000
 
-/* Size of cached memory mapping for system memory operation region */
+/* Default page size for use in mapping memory for operation regions */
 
-#define ACPI_SYSMEM_REGION_WINDOW_SIZE  4096
+#define ACPI_DEFAULT_PAGE_SIZE          4096	/* Must be power of 2 */
 
 /* owner_id tracking. 8 entries allows for 255 owner_ids */
 

drivers/acpi/acpica/exregion.c

@@ -77,7 +77,8 @@ acpi_ex_system_memory_space_handler(u32 function,
 	void *logical_addr_ptr = NULL;
 	struct acpi_mem_space_context *mem_info = region_context;
 	u32 length;
-	acpi_size window_size;
+	acpi_size map_length;
+	acpi_size page_boundary_map_length;
 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
 	u32 remainder;
 #endif
@@ -144,25 +145,39 @@ acpi_ex_system_memory_space_handler(u32 function,
 		}
 
 		/*
-		 * Don't attempt to map memory beyond the end of the region, and
-		 * constrain the maximum mapping size to something reasonable.
+		 * Attempt to map from the requested address to the end of the region.
+		 * However, we will never map more than one page, nor will we cross
+		 * a page boundary.
 		 */
-		window_size = (acpi_size)
+		map_length = (acpi_size)
 		    ((mem_info->address + mem_info->length) - address);
 
-		if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) {
-			window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE;
+		/*
+		 * If mapping the entire remaining portion of the region will cross
+		 * a page boundary, just map up to the page boundary, do not cross.
+		 * On some systems, crossing a page boundary while mapping regions
+		 * can cause warnings if the pages have different attributes
+		 * due to resource management
+		 */
+		page_boundary_map_length =
+		    ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;
+
+		if (!page_boundary_map_length) {
+			page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
+		}
+
+		if (map_length > page_boundary_map_length) {
+			map_length = page_boundary_map_length;
 		}
 
 		/* Create a new mapping starting at the address given */
 
-		mem_info->mapped_logical_address =
-			acpi_os_map_memory((acpi_physical_address) address, window_size);
+		mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
 		if (!mem_info->mapped_logical_address) {
 			ACPI_ERROR((AE_INFO,
 				    "Could not map memory at %8.8X%8.8X, size %X",
 				    ACPI_FORMAT_NATIVE_UINT(address),
-				    (u32) window_size));
+				    (u32) map_length));
 			mem_info->mapped_length = 0;
 			return_ACPI_STATUS(AE_NO_MEMORY);
 		}
@@ -170,7 +185,7 @@ acpi_ex_system_memory_space_handler(u32 function,
 		/* Save the physical address and mapping size */
 
 		mem_info->mapped_physical_address = address;
-		mem_info->mapped_length = window_size;
+		mem_info->mapped_length = map_length;
 	}
 
 	/*

drivers/acpi/power_meter.c

@@ -294,7 +294,11 @@ static int set_acpi_trip(struct acpi_power_meter_resource *resource)
 		return -EINVAL;
 	}
 
-	return data;
+	/* _PTP returns 0 on success, nonzero otherwise */
+	if (data)
+		return -EINVAL;
+
+	return 0;
 }
 
 static ssize_t set_trip(struct device *dev, struct device_attribute *devattr,

drivers/acpi/proc.c

@@ -393,7 +393,7 @@ acpi_system_write_wakeup_device(struct file *file,
 	struct list_head *node, *next;
 	char strbuf[5];
 	char str[5] = "";
-	int len = count;
+	unsigned int len = count;
 	struct acpi_device *found_dev = NULL;
 
 	if (len > 4)

drivers/acpi/processor_core.c

@@ -770,7 +770,7 @@ static struct notifier_block acpi_cpu_notifier =
 	    .notifier_call = acpi_cpu_soft_notify,
 };
 
-static int acpi_processor_add(struct acpi_device *device)
+static int __cpuinit acpi_processor_add(struct acpi_device *device)
 {
 	struct acpi_processor *pr = NULL;
 	int result = 0;

drivers/acpi/processor_throttling.c

@@ -1133,15 +1133,15 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
 	int result = 0;
 	struct acpi_processor_throttling *pthrottling;
 
+	if (!pr)
+		return -EINVAL;
+
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 			  "pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
 			  pr->throttling.address,
 			  pr->throttling.duty_offset,
 			  pr->throttling.duty_width));
 
-	if (!pr)
-		return -EINVAL;
-
 	/*
 	 * Evaluate _PTC, _TSS and _TPC
 	 * They must all be present or none of them can be used.

drivers/acpi/video.c

@@ -1223,7 +1223,7 @@ acpi_video_device_write_state(struct file *file,
 	u32 state = 0;
 
 
-	if (!dev || count + 1 > sizeof str)
+	if (!dev || count >= sizeof(str))
 		return -EINVAL;
 
 	if (copy_from_user(str, buffer, count))
@@ -1280,7 +1280,7 @@ acpi_video_device_write_brightness(struct file *file,
 	int i;
 
 
-	if (!dev || !dev->brightness || count + 1 > sizeof str)
+	if (!dev || !dev->brightness || count >= sizeof(str))
 		return -EINVAL;
 
 	if (copy_from_user(str, buffer, count))
@@ -1562,7 +1562,7 @@ acpi_video_bus_write_POST(struct file *file,
 	unsigned long long opt, options;
 
 
-	if (!video || count + 1 > sizeof str)
+	if (!video || count >= sizeof(str))
 		return -EINVAL;
 
 	status = acpi_video_bus_POST_options(video, &options);
@@ -1602,7 +1602,7 @@ acpi_video_bus_write_DOS(struct file *file,
 	unsigned long opt;
 
 
-	if (!video || count + 1 > sizeof str)
+	if (!video || count >= sizeof(str))
 		return -EINVAL;
 
 	if (copy_from_user(str, buffer, count))