commit fa9cd547e097df4966b8bd5c94aeed953e32b14d
author Luming Yu <luming.yu@intel.com> Sat Mar 19 01:54:47 2005 -0500
committer Len Brown <len.brown@intel.com> Mon Jul 11 23:53:38 2005 -0400
tree 1f5fd7bf77154375fd337d4b98f2646cdc52fc9f
parent 451566f45a2e6cd10ba56e7220a9dd84ba3ef550

[ACPI] fix EC access width
http://bugzilla.kernel.org/show_bug.cgi?id=4346

Written-by: David Shaohua Li and Luming Yu
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/ec.c

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 69b04d4..e371622 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -600,7 +600,7 @@
 {
 	int			result = 0;
 	struct acpi_ec		*ec = NULL;
-	u32			temp = 0;
+	u64			temp = *value;
 	acpi_integer		f_v = 0;
 	int 			i = 0;
 
@@ -609,10 +609,9 @@
 	if ((address > 0xFF) || !value || !handler_context)
 		return_VALUE(AE_BAD_PARAMETER);
 
-	if(bit_width != 8) {
+	if (bit_width != 8 && acpi_strict) {
 		printk(KERN_WARNING PREFIX "acpi_ec_space_handler: bit_width should be 8\n");
-		if (acpi_strict)
-			return_VALUE(AE_BAD_PARAMETER);
+		return_VALUE(AE_BAD_PARAMETER);
 	}
 
 	ec = (struct acpi_ec *) handler_context;
@@ -620,11 +619,11 @@
 next_byte:
 	switch (function) {
 	case ACPI_READ:
-		result = acpi_ec_read(ec, (u8) address, &temp);
-		*value = (acpi_integer) temp;
+		temp = 0;
+		result = acpi_ec_read(ec, (u8) address, (u32 *)&temp);
 		break;
 	case ACPI_WRITE:
-		result = acpi_ec_write(ec, (u8) address, (u8) *value);
+		result = acpi_ec_write(ec, (u8) address, (u8) temp);
 		break;
 	default:
 		result = -EINVAL;
@@ -633,19 +632,18 @@
 	}
 
 	bit_width -= 8;
-	if(bit_width){
-
-		if(function == ACPI_READ)
-			f_v |= (acpi_integer) (*value) << 8*i;
-		if(function == ACPI_WRITE)
-			(*value) >>=8; 
+	if (bit_width) {
+		if (function == ACPI_READ)
+			f_v |= temp << 8 * i;
+		if (function == ACPI_WRITE)
+			temp >>= 8;
 		i++;
+		(u8)address ++;
 		goto next_byte;
 	}
 
-
-	if(function == ACPI_READ){
-		f_v |= (acpi_integer) (*value) << 8*i;
+	if (function == ACPI_READ) {
+		f_v |= temp << 8 * i;
 		*value = f_v;
 	}
 
@@ -664,8 +662,6 @@
 	default:
 		return_VALUE(AE_OK);
 	}
-	
-
 }