IB/uverbs: use stack variable 'base' in ib_uverbs_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_UVERBS_MAX_DEVICES in a system.

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/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index acae9ed05728..8c594cde8a1d 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -731,6 +731,7 @@ static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
 static void ib_uverbs_add_one(struct ib_device *device)
 {
         int devnum;
+        dev_t base;
         struct ib_uverbs_device *uverbs_dev;
 
         if (!device->alloc_ucontext)
@@ -750,6 +751,7 @@ static void ib_uverbs_add_one(struct ib_device *device)
                 goto err;
         }
         uverbs_dev->devnum = devnum;
+        base = devnum + IB_UVERBS_BASE_DEV;
         set_bit(devnum, dev_map);
         spin_unlock(&map_lock);
 
@@ -760,7 +762,7 @@ static void ib_uverbs_add_one(struct ib_device *device)
         uverbs_dev->cdev.owner = THIS_MODULE;
         uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
         kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum);
-        if (cdev_add(&uverbs_dev->cdev, IB_UVERBS_BASE_DEV + devnum, 1))
+        if (cdev_add(&uverbs_dev->cdev, base, 1))
                 goto err_cdev;
 
         uverbs_dev->dev = device_create(uverbs_class, device->dma_device,