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authorZhichang Yuan <yuanzhichang@hisilicon.com>2015-04-24 17:05:09 +0800
committerBjorn Helgaas <bhelgaas@google.com>2015-05-16 10:38:39 -0500
commit5dbb4c6167229c8d4f528e8ec26699a7305000a3 (patch)
tree12d4d6e98f4c376632de1b80948c9a005ed4f544 /drivers
parent5ebe6afaf0057ac3eaeb98defd5456894b446d22 (diff)
of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port
41f8bba7f555 ("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: 41f8bba7f555 ("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+
Diffstat (limited to 'drivers')
-rw-r--r--drivers/of/address.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 78a7dcbec7d8..6906a3f61bd8 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;