This is a note to let you know that I've just added the patch titled
of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
of-pci-fix-pci_address_to_pio-conversion-of-cpu-address-to-i-o-port.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5dbb4c6167229c8d4f528e8ec26699a7305000a3 Mon Sep 17 00:00:00 2001
From: Zhichang Yuan <yuanzhichang@xxxxxxxxxxxxx>
Date: Fri, 24 Apr 2015 17:05:09 +0800
Subject: of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port
From: Zhichang Yuan <yuanzhichang@xxxxxxxxxxxxx>
commit 5dbb4c6167229c8d4f528e8ec26699a7305000a3 upstream.
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@xxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Acked-by: Liviu Dudau <Liviu.Dudau@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/of/address.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -765,7 +765,7 @@ unsigned long __weak pci_address_to_pio(
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;
Patches currently in stable-queue which might be from yuanzhichang@xxxxxxxxxxxxx are
queue-4.1/of-pci-fix-pci_address_to_pio-conversion-of-cpu-address-to-i-o-port.patch
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