RDMA/ucma: Cleanup to reduce duplicate code

The lable "err1" does the same thing as the branch of copy_to_user()
failed in the function ucma_create_id(). Just jump to the label directly
to reduce duplicate code.

Link: https://lore.kernel.org/r/1620291106-3675-1-git-send-email-tanxiaofei@huawei.comSigned-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/core/ucma.c

@@ -468,8 +468,8 @@ static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf,
 	resp.id = ctx->id;
 	if (copy_to_user(u64_to_user_ptr(cmd.response),
 			 &resp, sizeof(resp))) {
-		ucma_destroy_private_ctx(ctx);
-		return -EFAULT;
+		ret = -EFAULT;
+		goto err1;
 	}
 
 	mutex_lock(&file->mut);