rtc-pcf8583: Check for i2c adapter functionality

Not all i2c adapters support I2C-level messaging.  Check that the adapter
does before probing for a PCF8583 chip, as the driver makes use of
i2c_transfer and i2c_master_send.

Signed-off-by: Jean Delvare <[email protected]>
Signed-off-by: Alessandro Zummo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jean Delvare 2007-10-16 01:28:18 -07:00 • committed by Linus Torvalds
commit c018664c51

View file

@ -332,6 +332,9 @@ static int pcf8583_probe(struct i2c_adapter *adap, int addr, int kind)
}
};
if (!i2c_check_functionality(adap, I2C_FUNC_I2C))
return 0;
pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
if (!pcf)
return -ENOMEM;