IB/ocrdma: convert to idr_alloc()

Convert to the much saner new idr interface.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/infiniband/hw/ocrdma/ocrdma_main.c

@@ -51,18 +51,6 @@ static DEFINE_IDR(ocrdma_dev_id);
 
 static union ib_gid ocrdma_zero_sgid;
 
-static int ocrdma_get_instance(void)
-{
-	int instance = 0;
-
-	/* Assign an unused number */
-	if (!idr_pre_get(&ocrdma_dev_id, GFP_KERNEL))
-		return -1;
-	if (idr_get_new(&ocrdma_dev_id, NULL, &instance))
-		return -1;
-	return instance;
-}
-
 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
 {
 	u8 mac_addr[6];
@@ -416,7 +404,7 @@ static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 		goto idr_err;
 
 	memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
-	dev->id = ocrdma_get_instance();
+	dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
 	if (dev->id < 0)
 		goto idr_err;