Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[uclinux-h8/linux.git] / drivers / acpi / scan.c

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 2649a06..ec25635 100644 (file)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1019,6 +1019,29 @@ static bool acpi_of_match_device(struct acpi_device *adev,
        return false;
 }
 
+static bool __acpi_match_device_cls(const struct acpi_device_id *id,
+                                   struct acpi_hardware_id *hwid)
+{
+       int i, msk, byte_shift;
+       char buf[3];
+
+       if (!id->cls)
+               return false;
+
+       /* Apply class-code bitmask, before checking each class-code byte */
+       for (i = 1; i <= 3; i++) {
+               byte_shift = 8 * (3 - i);
+               msk = (id->cls_msk >> byte_shift) & 0xFF;
+               if (!msk)
+                       continue;
+
+               sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
+               if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
+                       return false;
+       }
+       return true;
+}
+
 static const struct acpi_device_id *__acpi_match_device(
        struct acpi_device *device,
        const struct acpi_device_id *ids,
@@ -1036,9 +1059,12 @@ static const struct acpi_device_id *__acpi_match_device(
 
        list_for_each_entry(hwid, &device->pnp.ids, list) {
                /* First, check the ACPI/PNP IDs provided by the caller. */
-               for (id = ids; id->id[0]; id++)
-                       if (!strcmp((char *) id->id, hwid->id))
+               for (id = ids; id->id[0] || id->cls; id++) {
+                       if (id->id[0] && !strcmp((char *) id->id, hwid->id))
                                return id;
+                       else if (id->cls && __acpi_match_device_cls(id, hwid))
+                               return id;
+               }
 
                /*
                 * Next, check ACPI_DT_NAMESPACE_HID and try to match the
@@ -2101,6 +2127,8 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
                if (info->valid & ACPI_VALID_UID)
                        pnp->unique_id = kstrdup(info->unique_id.string,
                                                        GFP_KERNEL);
+               if (info->valid & ACPI_VALID_CLS)
+                       acpi_add_id(pnp, info->class_code.string);
 
                kfree(info);