IB/ucm: Use stack variable 'base' in ib_ucm_add_one

This change is not useful by itself, but sets us up for a future
change that allows us to support more than IB_UCM_MAX_DEVICES.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 7ff3300a86ca..06c50d80f0d8 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -1240,6 +1240,7 @@ static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
 static void ib_ucm_add_one(struct ib_device *device)
 {
         int devnum;
+        dev_t base;
         struct ib_ucm_device *ucm_dev;
 
         if (!device->alloc_ucontext ||
@@ -1257,12 +1258,13 @@ static void ib_ucm_add_one(struct ib_device *device)
                 goto err;
 
         ucm_dev->devnum = devnum;
+        base = devnum + IB_UCM_BASE_DEV;
         set_bit(devnum, dev_map);
 
         cdev_init(&ucm_dev->cdev, &ucm_fops);
         ucm_dev->cdev.owner = THIS_MODULE;
         kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum);
-        if (cdev_add(&ucm_dev->cdev, IB_UCM_BASE_DEV + devnum, 1))
+        if (cdev_add(&ucm_dev->cdev, base, 1))
                 goto err;
 
         ucm_dev->dev.class = &cm_class;