2 files changed, 3 insertions, 3 deletions

diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c
index 2a0b3be7cdd0..53bb43593863 100644
--- a/drivers/i2c/busses/i2c-powermac.c
+++ b/drivers/i2c/busses/i2c-powermac.c
@@ -148,8 +148,6 @@ static int i2c_powermac_master_xfer(	struct i2c_adapter *adap,
         int                     read;
         int                     addrdir;
 
-        if (num != 1)
-                return -EINVAL;
         if (msgs->flags & I2C_M_TEN)
                 return -EINVAL;
         read = (msgs->flags & I2C_M_RD) != 0;
@@ -166,7 +164,7 @@ static int i2c_powermac_master_xfer(	struct i2c_adapter *adap,
         rc = pmac_i2c_xfer(bus, addrdir, 0, 0, msgs->buf, msgs->len);
  bail:
         pmac_i2c_close(bus);
-        return rc < 0 ? rc : msgs->len;
+        return rc < 0 ? rc : 1;
 }
 
 static u32 i2c_powermac_func(struct i2c_adapter * adapter)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 526ddc8eecfb..eb0628a7ecc6 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -193,6 +193,8 @@ struct i2c_algorithm {
            to NULL. If an adapter algorithm can do SMBus access, set 
            smbus_xfer. If set to NULL, the SMBus protocol is simulated
            using common I2C messages */
+        /* master_xfer should return the number of messages successfully
+           processed, or a negative value on error */
         int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs, 
                            int num);
         int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,