Hi
i have an SBC with PowerPC7448+TSI109 bridge running 2.6.16 kernel. when i try to add one frame buffer kernel driver for a silicon motion graphics chip, i found that inb_p causes crashing, while outb_p does not cause kernel crash. but i do not know whether write was success or not.
But the same driver works well with 2.4.20 on another PowerPC SBC.
oops shows signal 7 (SIGBUS). can anyone suggest what are the possible reasons for this. ioread to another chip(USB) on the same board works fine.
Thanks in advance.