> after testing last patch, replacing request_irq() location is not a
> good idea,it might produce a little time windows ,in which the interrupts
> occurring inside  will be omitted.
> 
> the new patch adds a check point on interrupt handler in case field
> 'pch_base_address' has not been initialed.

What about using two for-loops in probe like this pseudo code?

for (all_channels)
	do_initialization

request_irq()

for (all_channels)
	register_adapter


This seems to me the correct order and most readable solution.