This patch is to check mem address space's acpi resource caching ability
and set prefetch flag of struct resource if it's prefetchable.
Signed-off-by: Lan Tianyu <tianyu....@intel.com>
---
drivers/acpi/resource.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index b7201fc..929f416 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -202,6 +202,9 @@ bool acpi_dev_resource_address_space(struct acpi_resource
*ares,
res->flags = acpi_dev_memresource_flags(len,
addr.info.mem.write_protect,
window);
+
+ if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
+ res->flags |= IORESOURCE_PREFETCH;
break;
case ACPI_IO_RANGE:
io_decode = addr.granularity == 0xfff ?
--
1.8.2.1
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