From ac7fc4fb2b6a126af8d07f46500440c9641976cf Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Mon, 14 Jul 2008 22:38:25 +0200 Subject: [PATCH] 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 --- drivers/i2c/busses/i2c-ali1535.c | 8 ++++---- drivers/i2c/busses/i2c-ali1563.c | 8 ++++---- drivers/i2c/busses/i2c-ali15x3.c | 6 +++--- drivers/i2c/busses/i2c-amd756.c | 8 +++----- drivers/i2c/busses/i2c-i801.c | 1 - drivers/i2c/busses/i2c-piix4.c | 6 +++--- drivers/i2c/busses/i2c-sis630.c | 5 ++--- drivers/i2c/busses/i2c-sis96x.c | 8 +------- drivers/i2c/busses/i2c-taos-evm.c | 5 ++--- drivers/i2c/busses/i2c-viapro.c | 2 +- 10 files changed, 23 insertions(+), 34 deletions(-) diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c index c21e4d96382e..704436cdec8e 100644 --- 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 30bd3ee70386..da5a382eee93 100644 --- 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 3d752561dc37..7b029b147a8e 100644 --- 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 3d5bcb65e9e0..f0baea62067d 100644 --- 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 7d6d9dfcc58a..213119211e58 100644 --- 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 77aaa5fe5e38..2bde47509e1a 100644 --- 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 c4cc5eddf50d..d7e6ff3e0187 100644 --- 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 29757b2e11dd..cde8e5880368 100644 --- 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 de9db49e54d9..224aa12ee7c8 100644 --- 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 7628fe8e0946..c611905df009 100644 --- 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; } -- 2.20.1