Hi Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.17-rc2 next-20180424]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/dma-buf-use-parameter-structure-for-dma_buf_attach/20180413-080639
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: powerpc64-allmodconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc64 

All errors (new ones prefixed by >>):

   drivers/staging/media/tegra-vde/tegra-vde.c: In function 'tegra_vde_attach_dmabuf':
>> drivers/staging/media/tegra-vde/tegra-vde.c:534:13: error: 'dmabuf' undeclared (first use in this function); did you mean 'dma_buf'?
      .dmabuf = dmabuf
                ^~~~~~
                dma_buf
   drivers/staging/media/tegra-vde/tegra-vde.c:534:13: note: each undeclared identifier is reported only once for each function it appears in

vim +534 drivers/staging/media/tegra-vde/tegra-vde.c

   521	
   522	static int tegra_vde_attach_dmabuf(struct device *dev,
   523					   int fd,
   524					   unsigned long offset,
   525					   unsigned int min_size,
   526					   struct dma_buf_attachment **a,
   527					   dma_addr_t *addr,
   528					   struct sg_table **s,
   529					   size_t *size,
   530					   enum dma_data_direction dma_dir)
   531	{
   532		struct dma_buf_attach_info attach_info = {
   533			.dev = dev,
 > 534			.dmabuf = dmabuf
   535		};
   536		struct dma_buf_attachment *attachment;
   537		struct dma_buf *dmabuf;
   538		struct sg_table *sgt;
   539		int err;
   540	
   541		dmabuf = dma_buf_get(fd);
   542		if (IS_ERR(dmabuf)) {
   543			dev_err(dev, "Invalid dmabuf FD\n");
   544			return PTR_ERR(dmabuf);
   545		}
   546	
   547		if ((u64)offset + min_size > dmabuf->size) {
   548			dev_err(dev, "Too small dmabuf size %zu @0x%lX, "
   549				     "should be at least %d\n",
   550				dmabuf->size, offset, min_size);
   551			return -EINVAL;
   552		}
   553	
   554		attachment = dma_buf_attach(&attach_info);
   555		if (IS_ERR(attachment)) {
   556			dev_err(dev, "Failed to attach dmabuf\n");
   557			err = PTR_ERR(attachment);
   558			goto err_put;
   559		}
   560	
   561		sgt = dma_buf_map_attachment(attachment, dma_dir);
   562		if (IS_ERR(sgt)) {
   563			dev_err(dev, "Failed to get dmabufs sg_table\n");
   564			err = PTR_ERR(sgt);
   565			goto err_detach;
   566		}
   567	
   568		if (sgt->nents != 1) {
   569			dev_err(dev, "Sparse DMA region is unsupported\n");
   570			err = -EINVAL;
   571			goto err_unmap;
   572		}
   573	
   574		*addr = sg_dma_address(sgt->sgl) + offset;
   575		*a = attachment;
   576		*s = sgt;
   577	
   578		if (size)
   579			*size = dmabuf->size - offset;
   580	
   581		return 0;
   582	
   583	err_unmap:
   584		dma_buf_unmap_attachment(attachment, sgt, dma_dir);
   585	err_detach:
   586		dma_buf_detach(dmabuf, attachment);
   587	err_put:
   588		dma_buf_put(dmabuf);
   589	
   590		return err;
   591	}
   592	

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation