Merge tag 'linux-kselftest-4.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / drivers / acpi / resource.c

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 8244f013f21095a9508e80ef01621e0ffbaab106..f1c966e05078426455227d8f582a7ddd0f211cb2 100644 (file)
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -193,6 +193,7 @@ 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;
 
        /*
@@ -204,9 +205,6 @@ 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
@@ -214,12 +212,22 @@ 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) {
@@ -236,8 +244,6 @@ 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;