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path: root/drivers/acpi/resource.c
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Diffstat (limited to 'drivers/acpi/resource.c')
-rw-r--r--drivers/acpi/resource.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 10561ce16ed1..e8d281739cbc 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -194,6 +194,7 @@ 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;
struct resource *res = &win->res;
/*
@@ -205,9 +206,6 @@ static bool acpi_decode_space(struct resource_win *win,
pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
addr->min_address_fixed, addr->max_address_fixed, len);
- res->start = attr->minimum;
- res->end = attr->maximum;
-
/*
* For bridges that translate addresses across the bridge,
* translation_offset is the offset that must be added to the
@@ -215,12 +213,22 @@ static bool acpi_decode_space(struct resource_win *win,
* primary side. Non-bridge devices must list 0 for all Address
* Translation offset bits.
*/
- if (addr->producer_consumer == ACPI_PRODUCER) {
- res->start += attr->translation_offset;
- res->end += attr->translation_offset;
- } else if (attr->translation_offset) {
+ if (addr->producer_consumer == ACPI_PRODUCER)
+ offset = attr->translation_offset;
+ 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;
+ if (sizeof(resource_size_t) < sizeof(u64) &&
+ (offset != win->offset || start != res->start || end != res->end)) {
+ pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
+ attr->minimum, attr->maximum);
+ return false;
}
switch (addr->resource_type) {
@@ -237,8 +245,6 @@ static bool acpi_decode_space(struct resource_win *win,
return false;
}
- win->offset = attr->translation_offset;
-
if (addr->producer_consumer == ACPI_PRODUCER)
res->flags |= IORESOURCE_WINDOW;