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of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port 

41f8bba7f5 ("of/pci: Add pci_register_io_range() and
pci_pio_to_address()") added support for systems with several I/O ranges
described by OF bindings.  It modified pci_address_to_pio() look up the
io_range for a given CPU physical address, but the conversion was wrong.

Fix the conversion of address to I/O port.

[bhelgaas: changelog]
Fixes: 41f8bba7f5 ("of/pci: Add pci_register_io_range() and pci_pio_to_address()")
Signed-off-by: Zhichang Yuan <yuanzhichang@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
CC: stable@vger.kernel.org	# v3.18+
This commit is contained in:
Zhichang Yuan 2015-04-24 17:05:09 +08:00 committed by Bjorn Helgaas
parent 5ebe6afaf0
commit 5dbb4c6167
1 changed files with 1 additions and 1 deletions
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2
drivers/of/address.c
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@ -765,7 +765,7 @@ unsigned long __weak pci_address_to_pio(phys_addr_t address)
spin_lock(&io_range_lock); spin_lock(&io_range_lock);
list_for_each_entry(res, &io_range_list, list) { list_for_each_entry(res, &io_range_list, list) {
if (address >= res->start && address < res->start + res->size) { if (address >= res->start && address < res->start + res->size) {
addr = res->start - address + offset; addr = address - res->start + offset;
break; break;
} }
offset += res->size; offset += res->size;