void handle_io_resource(struct resource_entry *io_entry)
{
	struct resource *mmio_res;

	mmio_res = kzalloc(sizeof(*mmio_res), GFP_KERNEL);
	mmio_res->flags = IORESOURCE_MEM;
	mmio_res->start = io_entry->offset + io_entry->res->start;
	mmio_res->end = io_entry->offset + io_entry->res->end;
	insert_resource(&iomem_resource, mmio_res)

	base = map_to_system_ioport_address(entry);
	io_entry->offset = base;
	io_entry->res->start += base;
	io_entry->res->end += base;
}

Signed-off-by: Jiang Liu <redacted>
---
 arch/ia64/pci/pci.c     | 26 ++++++++++++++++----------
 drivers/acpi/resource.c | 12 +++++-------
 2 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index be4c9ef..c75356b 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c

@@ -154,7 +154,7 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 	struct resource_entry *iospace;
 	struct resource *resource, *res = entry->res;
 	char *name;
-	unsigned long base, min, max, base_port;
+	unsigned long base_mmio, base_port;
 	unsigned int sparse = 0, space_nr, len;
 
 	len = strlen(info->common.name) + 32;

@@ -172,12 +172,10 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 		goto free_resource;
 
 	name = (char *)(iospace + 1);
-	min = res->start - entry->offset;
-	max = res->end - entry->offset;
-	base = __pa(io_space[space_nr].mmio_base);
+	base_mmio = __pa(io_space[space_nr].mmio_base);
 	base_port = IO_SPACE_BASE(space_nr);
 	snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->common.name,
-		 base_port + min, base_port + max);
+		 base_port + res->start, base_port + res->end);
 
 	/*
 	 * The SDM guarantees the legacy 0-64K space is sparse, but if the

@@ -190,19 +188,27 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 	resource = iospace->res;
 	resource->name  = name;
 	resource->flags = IORESOURCE_MEM;
-	resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min);
-	resource->end   = base + (sparse ? IO_SPACE_SPARSE_ENCODING(max) : max);
+	resource->start = base_mmio;
+	resource->end = base_mmio;
+	if (sparse) {
+		resource->start += IO_SPACE_SPARSE_ENCODING(res->start);
+		resource->end += IO_SPACE_SPARSE_ENCODING(res->end);
+	} else {
+		resource->start += res->start;
+		resource->end += res->end;
+	}
 	if (insert_resource(&iomem_resource, resource)) {
 		dev_err(dev,
 			"can't allocate host bridge io space resource  %pR\n",
 			resource);
 		goto free_resource;
 	}
+	resource_list_add_tail(iospace, &info->io_resources);
 
+	/* Adjust base of original IO port resource descriptor */
 	entry->offset = base_port;
-	res->start = min + base_port;
-	res->end = max + base_port;
-	resource_list_add_tail(iospace, &info->io_resources);
+	res->start += base_port;
+	res->end += base_port;
 
 	return 0;
 

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index cdc5c25..6578f68 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c

@@ -190,8 +190,7 @@ static bool acpi_decode_space(struct resource_win *win,
 {
 	u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
 	bool wp = addr->info.mem.write_protect;
-	u64 len = attr->address_length;
-	u64 start, end, offset = 0;
+	u64 len = attr->address_length, offset = 0;
 	struct resource *res = &win->res;
 
 	/*

@@ -215,14 +214,13 @@ static bool acpi_decode_space(struct resource_win *win,
 	else if (attr->translation_offset)
 		pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
 			 attr->translation_offset);
-	start = attr->minimum + offset;
-	end = attr->maximum + offset;
 
 	win->offset = offset;
-	res->start = start;
-	res->end = end;
+	res->start = attr->minimum;
+	res->end = attr->maximum;
 	if (sizeof(resource_size_t) < sizeof(u64) &&
-	    (offset != win->offset || start != res->start || end != res->end)) {
+	    (offset != win->offset || attr->minimum != res->start ||
+	     attr->maximum != res->end)) {
 		pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
 			attr->minimum, attr->maximum);
 		return false;

-- 
1.9.1