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Commit 27983896 authored by Kevin Hao's avatar Kevin Hao Committed by Benjamin Herrenschmidt
Browse files

powerpc/pci: Remove the stale comments of pci_process_bridge_OF_ranges 



These comments already don't apply to the current code. So just remove
them.

Signed-off-by: default avatarKevin Hao <haokexin@gmail.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent f274ef87

arch/powerpc/kernel/pci-common.c

+0 −9
Original line number Diff line number Diff line
@@ -657,15 +657,6 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar, 
 *     ranges. However, some machines (thanks Apple !) tend to split their

 *     space into lots of small contiguous ranges. So we have to coalesce.

 *

 *   - We can only cope with all memory ranges having the same offset

 *     between CPU addresses and PCI addresses. Unfortunately, some bridges

 *     are setup for a large 1:1 mapping along with a small "window" which

 *     maps PCI address 0 to some arbitrary high address of the CPU space in

 *     order to give access to the ISA memory hole.

 *     The way out of here that I've chosen for now is to always set the

 *     offset based on the first resource found, then override it if we

 *     have a different offset and the previous was set by an ISA hole.

 *

 *   - Some busses have IO space not starting at 0, which causes trouble with

 *     the way we do our IO resource renumbering. The code somewhat deals with

 *     it for 64 bits but I would expect problems on 32 bits.