1 files changed, 17 insertions, 20 deletions

diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c
index dc235bb8e24d..f1bba6396641 100644
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -1,7 +1,4 @@
 /*
-    sis96x.c - Part of lm_sensors, Linux kernel modules for hardware
-              monitoring
-
     Copyright (c) 2003 Mark M. Hoffman <mhoffman@lightlink.com>
 
     This program is free software; you can redistribute it and/or modify
@@ -40,6 +37,7 @@
 #include <linux/ioport.h>
 #include <linux/i2c.h>
 #include <linux/init.h>
+#include <linux/acpi.h>
 #include <asm/io.h>
 
 /* base address register in PCI config space */
@@ -111,7 +109,7 @@ static int sis96x_transaction(int size)
                 /* check it again */
                 if (((temp = sis96x_read(SMB_CNT)) & 0x03) != 0x00) {
                         dev_dbg(&sis96x_adapter.dev, "Failed (0x%02x)\n", temp);
-                        return -1;
+                        return -EBUSY;
                 } else {
                         dev_dbg(&sis96x_adapter.dev, "Successful\n");
                 }
@@ -136,19 +134,19 @@ static int sis96x_transaction(int size)
         /* If the SMBus is still busy, we give up */
         if (timeout >= MAX_TIMEOUT) {
                 dev_dbg(&sis96x_adapter.dev, "SMBus Timeout! (0x%02x)\n", temp);
-                result = -1;
+                result = -ETIMEDOUT;
         }
 
         /* device error - probably missing ACK */
         if (temp & 0x02) {
                 dev_dbg(&sis96x_adapter.dev, "Failed bus transaction!\n");
-                result = -1;
+                result = -ENXIO;
         }
 
         /* bus collision */
         if (temp & 0x04) {
                 dev_dbg(&sis96x_adapter.dev, "Bus collision!\n");
-                result = -1;
+                result = -EIO;
         }
 
         /* Finish up by resetting the bus */
@@ -161,11 +159,12 @@ static int sis96x_transaction(int size)
         return result;
 }
 
-/* Return -1 on error. */
+/* Return negative errno on error. */
 static s32 sis96x_access(struct i2c_adapter * adap, u16 addr,
                          unsigned short flags, char read_write,
                          u8 command, int size, union i2c_smbus_data * data)
 {
+        int status;
 
         switch (size) {
         case I2C_SMBUS_QUICK:
@@ -200,20 +199,14 @@ static s32 sis96x_access(struct i2c_adapter * adap, u16 addr,
                         SIS96x_PROC_CALL : SIS96x_WORD_DATA);
                 break;
 
-        case I2C_SMBUS_BLOCK_DATA:
-                /* TO DO: */
-                dev_info(&adap->dev, "SMBus block not implemented!\n");
-                return -1;
-                break;
-
         default:
-                dev_info(&adap->dev, "Unsupported I2C size\n");
-                return -1;
-                break;
+                dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+                return -EOPNOTSUPP;
         }
 
-        if (sis96x_transaction(size))
-                return -1;
+        status = sis96x_transaction(size);
+        if (status)
+                return status;
 
         if ((size != SIS96x_PROC_CALL) &&
                 ((read_write == I2C_SMBUS_WRITE) || (size == SIS96x_QUICK)))
@@ -249,7 +242,7 @@ static const struct i2c_algorithm smbus_algorithm = {
 static struct i2c_adapter sis96x_adapter = {
         .owner          = THIS_MODULE,
         .id             = I2C_HW_SMBUS_SIS96X,
-        .class          = I2C_CLASS_HWMON,
+        .class          = I2C_CLASS_HWMON | I2C_CLASS_SPD,
         .algo           = &smbus_algorithm,
 };
 
@@ -286,6 +279,10 @@ static int __devinit sis96x_probe(struct pci_dev *dev,
         dev_info(&dev->dev, "SiS96x SMBus base address: 0x%04x\n",
                         sis96x_smbus_base);
 
+        retval = acpi_check_resource_conflict(&dev->resource[SIS96x_BAR]);
+        if (retval)
+                return retval;
+
         /* Everything is happy, let's grab the memory and set things up. */
         if (!request_region(sis96x_smbus_base, SMB_IOSIZE,
                             sis96x_driver.name)) {