In the patch whose commit id is 41f8bba7f5552d0, function pci_pio_to_address
was modified to retieve the corresponding I/O port by CPU physical address.
But the convertion processing is not correct. It will return a wrong I/O port.
This patch will fix it.
Fixes: 41f8bba7f555 ("of/pci: Add pci_register_io_range() and pci_pio_to_address()")
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Zhichang Yuan <yuanzhichang@xxxxxxxxxxxxx>
---
changes since V1:
Improved commit message.
drivers/of/address.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 78a7dcb..6906a3f 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -765,7 +765,7 @@ unsigned long __weak pci_address_to_pio(phys_addr_t address)
spin_lock(&io_range_lock);
list_for_each_entry(res, &io_range_list, list) {
if (address >= res->start && address < res->start + res->size) {
- addr = res->start - address + offset;
+ addr = address - res->start + offset;
break;
}
offset += res->size;
--
1.9.1
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