Re: [RFC PATCH 3/3] RDMA/rxe: Support dma-buf as memory region

Hi Shunsuke,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on v5.14]
[cannot apply to rdma/for-next next-20210908]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Shunsuke-Mie/RDMA-rxe-Add-dma-buf-support/20210908-142001
base:    7d2a07b769330c34b4deabeed939325c77a7ec2f
config: x86_64-randconfig-a016-20210908 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 9c476172b93367d2cb88d7d3f4b1b5b456fa6020)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/80fcf7f4bc573f6f833baeb7e390e44a79ddd84f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shunsuke-Mie/RDMA-rxe-Add-dma-buf-support/20210908-142001
        git checkout 80fcf7f4bc573f6f833baeb7e390e44a79ddd84f
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/infiniband/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

drivers/infiniband/sw/rxe/rxe_mr.c:304:7: error: use of undeclared identifier 'i'

           for (i = 0; i < mr->num_map; i++)
                ^
   drivers/infiniband/sw/rxe/rxe_mr.c:304:14: error: use of undeclared identifier 'i'
           for (i = 0; i < mr->num_map; i++)
                       ^
   drivers/infiniband/sw/rxe/rxe_mr.c:304:31: error: use of undeclared identifier 'i'
           for (i = 0; i < mr->num_map; i++)
                                        ^
   drivers/infiniband/sw/rxe/rxe_mr.c:305:17: error: use of undeclared identifier 'i'
                   kfree(mr->map[i]);
                                 ^
   4 errors generated.


vim +/i +304 drivers/infiniband/sw/rxe/rxe_mr.c

   254	
   255	/* initialize a umem and map all the areas of dma-buf. */
   256	int rxe_mr_dmabuf_init_user(struct rxe_pd *pd, int fd, u64 start, u64 length,
   257				    u64 iova, int access, struct rxe_mr *mr)
   258	{
   259		struct ib_umem_dmabuf *umem_dmabuf;
   260		int num_buf;
   261		int err;
   262	
   263		umem_dmabuf = ib_umem_dmabuf_get(pd->ibpd.device, start, length, fd,
   264						 access, &rxe_ib_dmabuf_attach_ops);
   265		if (IS_ERR(umem_dmabuf)) {
   266			err = PTR_ERR(umem_dmabuf);
   267			pr_err("%s: failed to get umem_dmabuf (%d)", __func__, err);
   268			goto err1;
   269		}
   270	
   271		umem_dmabuf->private = mr;
   272	
   273		mr->umem = &umem_dmabuf->umem;
   274		mr->umem->iova = iova;
   275		num_buf = ib_umem_num_pages(mr->umem);
   276	
   277		rxe_mr_init(access, mr);
   278	
   279		err = rxe_mr_alloc(mr, num_buf);
   280		if (err)
   281			goto err1;
   282	
   283		mr->page_shift = PAGE_SHIFT;
   284		mr->page_mask = PAGE_SIZE - 1;
   285	
   286		mr->ibmr.pd = &pd->ibpd;
   287		mr->access = access;
   288		mr->length = length;
   289		mr->iova = iova;
   290		mr->va = start;
   291		mr->offset = ib_umem_offset(mr->umem);
   292		mr->state = RXE_MR_STATE_VALID;
   293		mr->type = RXE_MR_TYPE_MR;
   294	
   295		err = rxe_map_dmabuf_mr(mr);
   296		if (err) {
   297			pr_err("%s: failed to map the dma-buf region", __func__);
   298			goto err2;
   299		}
   300	
   301		return 0;
   302	
   303	err2:
 > 304		for (i = 0; i < mr->num_map; i++)
   305			kfree(mr->map[i]);
   306		kfree(mr->map);
   307	err1:
   308		return err;
   309	}
   310	

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0-DAY CI Kernel Test Service, Intel Corporation
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