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i2c-i801: Properly report bus arbitration loss 

Bit BUS_ERR of the status register means that the ICH host controller
lost the arbitration. Report this event as such.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
hifive-unleashed-5.1
Jean Delvare 2008-07-14 22:38:32 +02:00 committed by Jean Delvare
parent 90df2cb1c8
commit dcb5c9239d
1 changed files with 4 additions and 6 deletions
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10
drivers/i2c/busses/i2c-i801.c
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@ -179,10 +179,8 @@ static int i801_transaction(int xact)
}
if (temp & SMBHSTSTS_BUS_ERR) {
result = -EIO;
dev_err(&I801_dev->dev, "Bus collision! SMBus may be locked "
"until next hard reset. (sorry!)\n");
/* Clock stops and slave is stuck in mid-transmission */
result = -EAGAIN;
dev_dbg(&I801_dev->dev, "Lost arbitration\n");
}
if (temp & SMBHSTSTS_DEV_ERR) {
@ -339,8 +337,8 @@ static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data,
dev_dbg(&I801_dev->dev,
"Error: Failed bus transaction\n");
} else if (temp & SMBHSTSTS_BUS_ERR) {
result = -EIO;
dev_err(&I801_dev->dev, "Bus collision!\n");
result = -EAGAIN;
dev_dbg(&I801_dev->dev, "Lost arbitration\n");
} else if (temp & SMBHSTSTS_DEV_ERR) {
result = -ENXIO;
dev_dbg(&I801_dev->dev, "Error: no response!\n");