ACPI: Unify the parsing of address_space and ext_address_space

With the unions in place which let us identify the substructs we can
use a single parser for address_space and ext_address_space.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 34 insertions, 56 deletions

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index cdb1a3c4a0b9..99903d196024 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -178,6 +178,35 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
 
+static bool acpi_decode_space(struct resource *res,
+                              struct acpi_resource_address *addr,
+                              struct acpi_address64_attribute *attr)
+{
+        u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
+        bool window = addr->producer_consumer == ACPI_PRODUCER;
+        bool wp = addr->info.mem.write_protect;
+        u64 len = attr->address_length;
+
+        res->start = attr->minimum;
+        res->end = attr->maximum;
+
+        switch (addr->resource_type) {
+        case ACPI_MEMORY_RANGE:
+                acpi_dev_memresource_flags(res, len, wp, window);
+                break;
+        case ACPI_IO_RANGE:
+                acpi_dev_ioresource_flags(res, len, iodec, window);
+                break;
+        case ACPI_BUS_NUMBER_RANGE:
+                res->flags = IORESOURCE_BUS;
+                break;
+        default:
+                return false;
+        }
+
+        return !(res->flags & IORESOURCE_DISABLED);
+}
+
 /**
  * acpi_dev_resource_address_space - Extract ACPI address space information.
  * @ares: Input ACPI resource object.
@@ -190,39 +219,13 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
                                      struct resource *res)
 {
-        acpi_status status;
         struct acpi_resource_address64 addr;
-        bool window;
-        u8 io_decode;
-
-        status = acpi_resource_to_address64(ares, &addr);
-        if (ACPI_FAILURE(status))
-                return false;
 
-        res->start = addr.address.minimum;
-        res->end = addr.address.maximum;
-        window = addr.producer_consumer == ACPI_PRODUCER;
-
-        switch(addr.resource_type) {
-        case ACPI_MEMORY_RANGE:
-                acpi_dev_memresource_flags(res, addr.address.address_length,
-                                           addr.info.mem.write_protect,
-                                           window);
-                break;
-        case ACPI_IO_RANGE:
-                io_decode = addr.address.granularity == 0xfff ?
-                                ACPI_DECODE_10 : ACPI_DECODE_16;
-                acpi_dev_ioresource_flags(res, addr.address.address_length,
-                                          io_decode, window);
-                break;
-        case ACPI_BUS_NUMBER_RANGE:
-                res->flags = IORESOURCE_BUS;
-                break;
-        default:
+        if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
                 return false;
-        }
 
-        return !(res->flags & IORESOURCE_DISABLED);
+        return acpi_decode_space(res, (struct acpi_resource_address *)&addr,
+                                 &addr.address);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
 
@@ -239,39 +242,14 @@ bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
                                          struct resource *res)
 {
         struct acpi_resource_extended_address64 *ext_addr;
-        bool window;
-        u8 io_decode;
 
         if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
                 return false;
 
         ext_addr = &ares->data.ext_address64;
 
-        res->start = ext_addr->address.minimum;
-        res->end = ext_addr->address.maximum;
-        window = ext_addr->producer_consumer == ACPI_PRODUCER;
-
-        switch(ext_addr->resource_type) {
-        case ACPI_MEMORY_RANGE:
-                acpi_dev_memresource_flags(res,
-                                           ext_addr->address.address_length,
-                                           ext_addr->info.mem.write_protect,
-                                           window);
-                break;
-        case ACPI_IO_RANGE:
-                io_decode = ext_addr->address.granularity == 0xfff ?
-                                ACPI_DECODE_10 : ACPI_DECODE_16;
-                acpi_dev_ioresource_flags(res, ext_addr->address.address_length,
-                                          io_decode, window);
-                break;
-        case ACPI_BUS_NUMBER_RANGE:
-                res->flags = IORESOURCE_BUS;
-                break;
-        default:
-                return false;
-        }
-
-        return !(res->flags & IORESOURCE_DISABLED);
+        return acpi_decode_space(res, (struct acpi_resource_address *)ext_addr,
+                                 &ext_addr->address);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);