[RFC PATCH 3/4] ACPI: Add new acpi_dev_resource_address_space_with_addr() function

[Lan Tianyu <tianyu.lan@intel.com>]

Make acpi_dev_resource_address_space() to accept struct
acpi_resource_address64 as param and rename it to *_with_addr.

This is for some cases that acpi address info is also needed
after convert from acpi resouce to generic resource.

Add acpi_devi_resource_addres_space() again as a wrapper of new
function for original users.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 drivers/acpi/resource.c | 53 ++++++++++++++++++++++++++++++++++---------------
 include/linux/acpi.h    |  3 +++
 2 files changed, 40 insertions(+), 16 deletions(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 84bc3db..76da28b 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -162,19 +162,21 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
 
 /**
- * acpi_dev_resource_address_space - Extract ACPI address space information.
+ * acpi_dev_resource_address_space_with_addr - Extract ACPI address space information.
  * @ares: Input ACPI resource object.
+ * @addr: Output ACPI resource address64 space object.
  * @res: Output generic resource object.
  *
  * Check if the given ACPI resource object represents an address space resource
- * and if that's the case, use the information in it to populate the generic
- * resource object pointed to by @res.
+ * and if that's the case, convert it to ACPI resource address64 space object
+ * pointed to by @addr and use the information to populate the generic resource
+ * object pointed to by @re.
  */
-bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+bool acpi_dev_resource_address_space_with_addr(struct acpi_resource *ares,
+				     struct acpi_resource_address64 *addr,
 				     struct resource *res)
 {
 	acpi_status status;
-	struct acpi_resource_address64 addr;
 	bool window;
 	u64 len;
 	u8 io_decode;
@@ -188,29 +190,29 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares,
 		return false;
 	}
 
-	status = acpi_resource_to_address64(ares, &addr);
+	status = acpi_resource_to_address64(ares, addr);
 	if (ACPI_FAILURE(status))
 		return true;
 
-	res->start = addr.minimum + addr.translation_offset;
-	res->end = addr.maximum + addr.translation_offset;
-	window = addr.producer_consumer == ACPI_PRODUCER;
+	res->start = addr->minimum + addr->translation_offset;
+	res->end = addr->maximum + addr->translation_offset;
+	window = addr->producer_consumer == ACPI_PRODUCER;
 
-	switch(addr.resource_type) {
+	switch (addr->resource_type) {
 	case ACPI_MEMORY_RANGE:
-		len = addr.maximum - addr.minimum + 1;
+		len = addr->maximum - addr->minimum + 1;
 		res->flags = acpi_dev_memresource_flags(len,
-						addr.info.mem.write_protect,
+						addr->info.mem.write_protect,
 						window);
 
-		if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
+		if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
 			res->flags |= IORESOURCE_PREFETCH;
 		break;
 	case ACPI_IO_RANGE:
-		io_decode = addr.granularity == 0xfff ?
+		io_decode = addr->granularity == 0xfff ?
 				ACPI_DECODE_10 : ACPI_DECODE_16;
-		res->flags = acpi_dev_ioresource_flags(addr.minimum,
-						       addr.maximum,
+		res->flags = acpi_dev_ioresource_flags(addr->minimum,
+						       addr->maximum,
 						       io_decode, window);
 		break;
 	case ACPI_BUS_NUMBER_RANGE:
@@ -222,6 +224,25 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares,
 
 	return true;
 }
+EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space_with_addr);
+
+/**
+ * acpi_dev_resource_address_space - Extract ACPI address space information.
+ * @ares: Input ACPI resource object.
+ * @res: Output generic resource object.
+ *
+ * Check if the given ACPI resource object represents an address space resource
+ * and if that's the case, use the information in it to populate the generic
+ * resource object pointed to by @res.
+ */
+bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+				     struct resource *res)
+{
+	struct acpi_resource_address64 addr;
+
+	return acpi_dev_resource_address_space_with_addr(ares, &addr,
+							 res);
+}
 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
 
 /**
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index a5db4ae..9f5c0d5 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -260,6 +260,9 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res);
 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res);
 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
 				     struct resource *res);
+bool acpi_dev_resource_address_space_with_addr(struct acpi_resource *ares,
+				struct acpi_resource_address64 *addr,
+				struct resource *res);
 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
 					 struct resource *res);
 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
-- 
1.8.2.1