i2c: Consistently reject unsupported transactions

Many PC SMBus host controller drivers don't properly handle the case
where they are requested to achieve a transaction they do not support.
Update them so that the consistently print a warning message and
return a single error value in this case.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c
index c21e4d9..704436c 100644 (file)
--- a/drivers/i2c/busses/i2c-ali1535.c
+++ b/drivers/i2c/busses/i2c-ali1535.c
@@ -357,10 +357,6 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
        outb_p(0xFF, SMBHSTSTS);
 
        switch (size) {
-       case I2C_SMBUS_PROC_CALL:
-               dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
-               result = -EOPNOTSUPP;
-               goto EXIT;
        case I2C_SMBUS_QUICK:
                outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
                       SMBHSTADD);
@@ -418,6 +414,10 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
                                outb_p(data->block[i], SMBBLKDAT);
                }
                break;
+       default:
+               dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+               result = -EOPNOTSUPP;
+               goto EXIT;
        }
 
        result = ali1535_transaction(adap);

diff --git a/drivers/i2c/busses/i2c-ali1563.c b/drivers/i2c/busses/i2c-ali1563.c
index 30bd3ee..da5a382 100644 (file)
--- a/drivers/i2c/busses/i2c-ali1563.c
+++ b/drivers/i2c/busses/i2c-ali1563.c
@@ -246,10 +246,6 @@ static s32 ali1563_access(struct i2c_adapter * a, u16 addr,
 
        /* Map the size to what the chip understands */
        switch (size) {
-       case I2C_SMBUS_PROC_CALL:
-               dev_err(&a->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
-               error = -EINVAL;
-               break;
        case I2C_SMBUS_QUICK:
                size = HST_CNTL2_QUICK;
                break;
@@ -265,6 +261,10 @@ static s32 ali1563_access(struct i2c_adapter * a, u16 addr,
        case I2C_SMBUS_BLOCK_DATA:
                size = HST_CNTL2_BLOCK;
                break;
+       default:
+               dev_warn(&a->dev, "Unsupported transaction %d\n", size);
+               error = -EOPNOTSUPP;
+               goto Done;
        }
 
        outb_p(((addr & 0x7f) << 1) | (rw & 0x01), SMB_HST_ADD);

diff --git a/drivers/i2c/busses/i2c-ali15x3.c b/drivers/i2c/busses/i2c-ali15x3.c
index 3d75256..7b029b1 100644 (file)
--- a/drivers/i2c/busses/i2c-ali15x3.c
+++ b/drivers/i2c/busses/i2c-ali15x3.c
@@ -362,9 +362,6 @@ static s32 ali15x3_access(struct i2c_adapter * adap, u16 addr,
        }
 
        switch (size) {
-       case I2C_SMBUS_PROC_CALL:
-               dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
-               return -EOPNOTSUPP;
        case I2C_SMBUS_QUICK:
                outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
                       SMBHSTADD);
@@ -417,6 +414,9 @@ static s32 ali15x3_access(struct i2c_adapter * adap, u16 addr,
                }
                size = ALI15X3_BLOCK_DATA;
                break;
+       default:
+               dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+               return -EOPNOTSUPP;
        }
 
        outb_p(size, SMBHSTCNT);        /* output command */

diff --git a/drivers/i2c/busses/i2c-amd756.c b/drivers/i2c/busses/i2c-amd756.c
index 3d5bcb6..f0baea6 100644 (file)
--- a/drivers/i2c/busses/i2c-amd756.c
+++ b/drivers/i2c/busses/i2c-amd756.c
@@ -200,12 +200,7 @@ static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
        int i, len;
        int status;
 
-       /** TODO: Should I supporte the 10-bit transfers? */
        switch (size) {
-       case I2C_SMBUS_PROC_CALL:
-               dev_dbg(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
-               /* TODO: Well... It is supported, I'm just not sure what to do here... */
-               return -EOPNOTSUPP;
        case I2C_SMBUS_QUICK:
                outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
                       SMB_HOST_ADDRESS);
@@ -252,6 +247,9 @@ static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
                }
                size = AMD756_BLOCK_DATA;
                break;
+       default:
+               dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+               return -EOPNOTSUPP;
        }
 
        /* How about enabling interrupts... */

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 7d6d9df..2131192 100644 (file)
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -513,7 +513,6 @@ static s32 i801_access(struct i2c_adapter * adap, u16 addr,
                        outb_p(command, SMBHSTCMD);
                block = 1;
                break;
-       case I2C_SMBUS_PROC_CALL:
        default:
                dev_err(&I801_dev->dev, "Unsupported transaction %d\n", size);
                return -EOPNOTSUPP;

diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 77aaa5f..2bde475 100644 (file)
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -307,9 +307,6 @@ static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
        int status;
 
        switch (size) {
-       case I2C_SMBUS_PROC_CALL:
-               dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
-               return -EOPNOTSUPP;
        case I2C_SMBUS_QUICK:
                outb_p((addr << 1) | read_write,
                       SMBHSTADD);
@@ -355,6 +352,9 @@ static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
                }
                size = PIIX4_BLOCK_DATA;
                break;
+       default:
+               dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+               return -EOPNOTSUPP;
        }
 
        outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT);

diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c
index c4cc5ed..d7e6ff3 100644 (file)
--- a/drivers/i2c/busses/i2c-sis630.c
+++ b/drivers/i2c/busses/i2c-sis630.c
@@ -356,7 +356,8 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr,
                        size = SIS630_BLOCK_DATA;
                        return sis630_block_data(adap, data, read_write);
                default:
-                       printk("Unsupported SMBus operation\n");
+                       dev_warn(&adap->dev, "Unsupported transaction %d\n",
+                                size);
                        return -EOPNOTSUPP;
        }
 
@@ -378,8 +379,6 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr,
                case SIS630_WORD_DATA:
                        data->word = sis630_read(SMB_BYTE) + (sis630_read(SMB_BYTE + 1) << 8);
                        break;
-               default:
-                       return -EOPNOTSUPP;
        }
 
        return 0;

diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c
index 29757b2..cde8e58 100644 (file)
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -201,14 +201,8 @@ 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 -EOPNOTSUPP;
-               break;
-
        default:
-               dev_info(&adap->dev, "Unsupported SMBus operation\n");
+               dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
                return -EOPNOTSUPP;
        }
 

diff --git a/drivers/i2c/busses/i2c-taos-evm.c b/drivers/i2c/busses/i2c-taos-evm.c
index de9db49..224aa12 100644 (file)
--- a/drivers/i2c/busses/i2c-taos-evm.c
+++ b/drivers/i2c/busses/i2c-taos-evm.c
@@ -96,9 +96,8 @@ static int taos_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
                        sprintf(p, "$%02X", command);
                break;
        default:
-               dev_dbg(&adapter->dev, "Unsupported transaction size %d\n",
-                       size);
-               return -EINVAL;
+               dev_warn(&adapter->dev, "Unsupported transaction %d\n", size);
+               return -EOPNOTSUPP;
        }
 
        /* Send the transaction to the TAOS EVM */

diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index 7628fe8..c611905 100644 (file)
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -287,7 +287,7 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
        return 0;
 
 exit_unsupported:
-       dev_warn(&vt596_adapter.dev, "Unsupported command invoked! (0x%02x)\n",
+       dev_warn(&vt596_adapter.dev, "Unsupported transaction %d\n",
                 size);
        return -EOPNOTSUPP;
 }