c13beb0171
The problem is that the code does a check for the granparent of the Promise chip, if this is a bridge of the right type, we have a TX4 on our hands, and need to handle that ones "issues". Now the grandparent check cause subtle bugs in the newbus system, mainly that pci_get_devid doesn't return an error value. This patch works around the issue by using BUS_READ_IVAR() instead.