IB/umad: Convert *cdev to cdev in struct ib_umad_port

Instead of storing pointers to cdev and sm_cdev, embed the full
structures instead.

This change allows us to use the container_of() macro in ib_umad_open()
and ib_umad_sm_open() in a future patch.

This change increases the size of struct ib_umad_port to 320 bytes
from 128.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 20 insertions, 26 deletions

diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 7de02969ed7..40440ef1b31 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -87,10 +87,10 @@ enum {
  */
 
 struct ib_umad_port {
-        struct cdev           *cdev;
+        struct cdev           cdev;
         struct device         *dev;
 
-        struct cdev           *sm_cdev;
+        struct cdev           sm_cdev;
         struct device         *sm_dev;
         struct semaphore       sm_sem;
 
@@ -1008,17 +1008,14 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
         mutex_init(&port->file_mutex);
         INIT_LIST_HEAD(&port->file_list);
 
-        port->cdev = cdev_alloc();
-        if (!port->cdev)
-                return -1;
-        port->cdev->owner = THIS_MODULE;
-        port->cdev->ops   = &umad_fops;
-        kobject_set_name(&port->cdev->kobj, "umad%d", port->dev_num);
-        if (cdev_add(port->cdev, base_dev + port->dev_num, 1))
+        cdev_init(&port->cdev, &umad_fops);
+        port->cdev.owner = THIS_MODULE;
+        kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num);
+        if (cdev_add(&port->cdev, base_dev + port->dev_num, 1))
                 goto err_cdev;
 
         port->dev = device_create(umad_class, device->dma_device,
-                                  port->cdev->dev, port,
+                                  port->cdev.dev, port,
                                   "umad%d", port->dev_num);
         if (IS_ERR(port->dev))
                 goto err_cdev;
@@ -1028,17 +1025,14 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
         if (device_create_file(port->dev, &dev_attr_port))
                 goto err_dev;
 
-        port->sm_cdev = cdev_alloc();
-        if (!port->sm_cdev)
-                goto err_dev;
-        port->sm_cdev->owner = THIS_MODULE;
-        port->sm_cdev->ops   = &umad_sm_fops;
-        kobject_set_name(&port->sm_cdev->kobj, "issm%d", port->dev_num);
-        if (cdev_add(port->sm_cdev, base_dev + port->dev_num + IB_UMAD_MAX_PORTS, 1))
+        cdev_init(&port->sm_cdev, &umad_sm_fops);
+        port->sm_cdev.owner = THIS_MODULE;
+        kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num);
+        if (cdev_add(&port->sm_cdev, base_dev + port->dev_num + IB_UMAD_MAX_PORTS, 1))
                 goto err_sm_cdev;
 
         port->sm_dev = device_create(umad_class, device->dma_device,
-                                     port->sm_cdev->dev, port,
+                                     port->sm_cdev.dev, port,
                                      "issm%d", port->dev_num);
         if (IS_ERR(port->sm_dev))
                 goto err_sm_cdev;
@@ -1055,16 +1049,16 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
         return 0;
 
 err_sm_dev:
-        device_destroy(umad_class, port->sm_cdev->dev);
+        device_destroy(umad_class, port->sm_cdev.dev);
 
 err_sm_cdev:
-        cdev_del(port->sm_cdev);
+        cdev_del(&port->sm_cdev);
 
 err_dev:
-        device_destroy(umad_class, port->cdev->dev);
+        device_destroy(umad_class, port->cdev.dev);
 
 err_cdev:
-        cdev_del(port->cdev);
+        cdev_del(&port->cdev);
         clear_bit(port->dev_num, dev_map);
 
         return -1;
@@ -1079,11 +1073,11 @@ static void ib_umad_kill_port(struct ib_umad_port *port)
         dev_set_drvdata(port->dev,    NULL);
         dev_set_drvdata(port->sm_dev, NULL);
 
-        device_destroy(umad_class, port->cdev->dev);
-        device_destroy(umad_class, port->sm_cdev->dev);
+        device_destroy(umad_class, port->cdev.dev);
+        device_destroy(umad_class, port->sm_cdev.dev);
 
-        cdev_del(port->cdev);
-        cdev_del(port->sm_cdev);
+        cdev_del(&port->cdev);
+        cdev_del(&port->sm_cdev);
 
         spin_lock(&port_lock);
         umad_port[port->dev_num] = NULL;