From: Lan Tianyu <tianyu.lan@xxxxxxxxx> 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.lan@xxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
