[RFC Patch 15/19] ACPI: Add field offset to struct resource_list_entry

[Jiang Liu <jiang.liu@linux.intel.com>]

Add field offset to struct resource_list_entry to host address space
translation offset so it could be used to represent bridge resources.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 drivers/acpi/resource.c |   13 ++++++++-----
 include/linux/acpi.h    |    1 +
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 16d334a1ee25..54204ac94f8e 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -462,7 +462,8 @@ struct res_proc_context {
 };
 
 static acpi_status acpi_dev_new_resource_entry(struct resource *r,
-					       struct res_proc_context *c)
+					       struct res_proc_context *c,
+					       resource_size_t offset)
 {
 	struct resource_list_entry *rentry;
 
@@ -472,6 +473,7 @@ static acpi_status acpi_dev_new_resource_entry(struct resource *r,
 		return AE_NO_MEMORY;
 	}
 	rentry->res = *r;
+	rentry->offset = offset;
 	list_add_tail(&rentry->node, c->list);
 	c->count++;
 	return AE_OK;
@@ -480,6 +482,7 @@ static acpi_status acpi_dev_new_resource_entry(struct resource *r,
 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
 					     void *context)
 {
+	resource_size_t offset = 0;
 	struct res_proc_context *c = context;
 	struct resource r;
 	int i;
@@ -500,14 +503,14 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
 
 	if (acpi_dev_resource_memory(ares, &r)
 	    || acpi_dev_resource_io(ares, &r)
-	    || acpi_dev_resource_address_space(ares, &r, NULL)
-	    || acpi_dev_resource_ext_address_space(ares, &r, NULL))
-		return acpi_dev_new_resource_entry(&r, c);
+	    || acpi_dev_resource_address_space(ares, &r, &offset)
+	    || acpi_dev_resource_ext_address_space(ares, &r, &offset))
+		return acpi_dev_new_resource_entry(&r, c, offset);
 
 	for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) {
 		acpi_status status;
 
-		status = acpi_dev_new_resource_entry(&r, c);
+		status = acpi_dev_new_resource_entry(&r, c, 0);
 		if (ACPI_FAILURE(status))
 			return status;
 	}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index bde8119f5897..fea78e772450 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -300,6 +300,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 struct resource_list_entry {
 	struct list_head node;
 	struct resource res;
+	resource_size_t offset;
 };
 
 void acpi_dev_free_resource_list(struct list_head *list);
-- 
1.7.10.4