Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (179 commits)
  ACPI: Fix acpi_processor_idle and idle= boot parameters interaction
  acpi: fix section mismatch warning in pnpacpi
  intel_menlo: fix build warning
  ACPI: Cleanup: Remove unneeded, multiple local dummy variables
  ACPI: video - fix permissions on some proc entries
  ACPI: video - properly handle errors when registering proc elements
  ACPI: video - do not store invalid entries in attached_array list
  ACPI: re-name acpi_pm_ops to acpi_suspend_ops
  ACER_WMI/ASUS_LAPTOP: fix build bug
  thinkpad_acpi: fix possible NULL pointer dereference if kstrdup failed
  ACPI: check a return value correctly in acpi_power_get_context()
  #if 0 acpi/bay.c:eject_removable_drive()
  eeepc-laptop: add hwmon fan control
  eeepc-laptop: add backlight
  eeepc-laptop: add base driver
  ACPI: thinkpad-acpi: bump up version to 0.20
  ACPI: thinkpad-acpi: fix selects in Kconfig
  ACPI: thinkpad-acpi: use a private workqueue
  ACPI: thinkpad-acpi: fluff really minor fix
  ACPI: thinkpad-acpi: use uppercase for "LED" on user documentation
  ...

Fixed conflicts in drivers/acpi/video.c and drivers/misc/intel_menlow.c
manually.

1 files changed, 37 insertions, 9 deletions

diff --git a/drivers/acpi/executer/exfldio.c b/drivers/acpi/executer/exfldio.c
index 65a48b6170e..e336b5dc7a5 100644
--- a/drivers/acpi/executer/exfldio.c
+++ b/drivers/acpi/executer/exfldio.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -263,7 +263,8 @@ acpi_ex_access_region(union acpi_operand_object *obj_desc,
 			      rgn_desc->region.space_id,
 			      obj_desc->common_field.access_byte_width,
 			      obj_desc->common_field.base_byte_offset,
-			      field_datum_byte_offset, (void *)address));
+			      field_datum_byte_offset, ACPI_CAST_PTR(void,
+								     address)));
 
 	/* Invoke the appropriate address_space/op_region handler */
 
@@ -805,18 +806,39 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
 	u32 datum_count;
 	u32 field_datum_count;
 	u32 i;
+	u32 required_length;
+	void *new_buffer;
 
 	ACPI_FUNCTION_TRACE(ex_insert_into_field);
 
 	/* Validate input buffer */
 
-	if (buffer_length <
-	    ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length)) {
-		ACPI_ERROR((AE_INFO,
-			    "Field size %X (bits) is too large for buffer (%X)",
-			    obj_desc->common_field.bit_length, buffer_length));
+	new_buffer = NULL;
+	required_length =
+	    ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length);
+	/*
+	 * We must have a buffer that is at least as long as the field
+	 * we are writing to.  This is because individual fields are
+	 * indivisible and partial writes are not supported -- as per
+	 * the ACPI specification.
+	 */
+	if (buffer_length < required_length) {
 
-		return_ACPI_STATUS(AE_BUFFER_OVERFLOW);
+		/* We need to create a new buffer */
+
+		new_buffer = ACPI_ALLOCATE_ZEROED(required_length);
+		if (!new_buffer) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		/*
+		 * Copy the original data to the new buffer, starting
+		 * at Byte zero.  All unused (upper) bytes of the
+		 * buffer will be 0.
+		 */
+		ACPI_MEMCPY((char *)new_buffer, (char *)buffer, buffer_length);
+		buffer = new_buffer;
+		buffer_length = required_length;
 	}
 
 	/*
@@ -866,7 +888,7 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
 							merged_datum,
 							field_offset);
 		if (ACPI_FAILURE(status)) {
-			return_ACPI_STATUS(status);
+			goto exit;
 		}
 
 		field_offset += obj_desc->common_field.access_byte_width;
@@ -924,5 +946,11 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
 						mask, merged_datum,
 						field_offset);
 
+      exit:
+	/* Free temporary buffer if we used one */
+
+	if (new_buffer) {
+		ACPI_FREE(new_buffer);
+	}
 	return_ACPI_STATUS(status);
 }