3 files changed, 31 insertions, 10 deletions

diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
index a70fe00aea16..67b8e9453b19 100644
--- a/drivers/mca/mca-bus.c
+++ b/drivers/mca/mca-bus.c
@@ -48,18 +48,24 @@ static int mca_bus_match (struct device *dev, struct device_driver *drv)
         struct mca_device *mca_dev = to_mca_device (dev);
         struct mca_driver *mca_drv = to_mca_driver (drv);
         const unsigned short *mca_ids = mca_drv->id_table;
-        int i;
-
-        if (!mca_ids)
-                return 0;
-
-        for(i = 0; mca_ids[i]; i++) {
-                if (mca_ids[i] == mca_dev->pos_id) {
-                        mca_dev->index = i;
-                        return 1;
+        int i = 0;
+
+        if (mca_ids) {
+                for(i = 0; mca_ids[i]; i++) {
+                        if (mca_ids[i] == mca_dev->pos_id) {
+                                mca_dev->index = i;
+                                return 1;
+                        }
                 }
         }
-
+        /* If the integrated id is present, treat it as though it were an
+         * additional id in the id_table (it can't be because by definition,
+         * integrated id's overflow a short */
+        if (mca_drv->integrated_id && mca_dev->pos_id ==
+            mca_drv->integrated_id) {
+                mca_dev->index = i;
+                return 1;
+        }
         return 0;
 }
 
diff --git a/drivers/mca/mca-driver.c b/drivers/mca/mca-driver.c
index 2223466b3d8a..32cd39bcc715 100644
--- a/drivers/mca/mca-driver.c
+++ b/drivers/mca/mca-driver.c
@@ -36,12 +36,25 @@ int mca_register_driver(struct mca_driver *mca_drv)
                 mca_drv->driver.bus = &mca_bus_type;
                 if ((r = driver_register(&mca_drv->driver)) < 0)
                         return r;
+                mca_drv->integrated_id = 0;
         }
 
         return 0;
 }
 EXPORT_SYMBOL(mca_register_driver);
 
+int mca_register_driver_integrated(struct mca_driver *mca_driver,
+                                   int integrated_id)
+{
+        int r = mca_register_driver(mca_driver);
+
+        if (!r)
+                mca_driver->integrated_id = integrated_id;
+
+        return r;
+}
+EXPORT_SYMBOL(mca_register_driver_integrated);
+
 void mca_unregister_driver(struct mca_driver *mca_drv)
 {
         if (MCA_bus)
diff --git a/include/linux/mca.h b/include/linux/mca.h
index 5cff2923092b..37972704617f 100644
--- a/include/linux/mca.h
+++ b/include/linux/mca.h
@@ -94,6 +94,7 @@ struct mca_bus {
 struct mca_driver {
         const short             *id_table;
         void                    *driver_data;
+        int                     integrated_id;
         struct device_driver    driver;
 };
 #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
@@ -125,6 +126,7 @@ extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev);
 extern struct bus_type mca_bus_type;
 
 extern int mca_register_driver(struct mca_driver *drv);
+extern int mca_register_driver_integrated(struct mca_driver *, int);
 extern void mca_unregister_driver(struct mca_driver *drv);
 
 /* WARNING: only called by the boot time device setup */