Hi Marek,

I love your patch! Yet something to improve:

[auto build test ERROR on next-20200618]
[also build test ERROR on v5.8-rc1]
[cannot apply to linuxtv-media/master staging/staging-testing 
drm-exynos/exynos-drm-next drm-intel/for-linux-next linus/master v5.8-rc1 v5.7 
v5.7-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    
https://github.com/0day-ci/linux/commits/Marek-Szyprowski/DRM-fix-struct-sg_table-nents-vs-orig_nents-misuse/20200619-184302
base:    ce2cc8efd7a40cbd17841add878cb691d0ce0bba
config: c6x-allyesconfig (attached as .config)
compiler: c6x-elf-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=c6x 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All errors (new ones prefixed by >>):

   drivers/staging/media/tegra-vde/iommu.c: In function 'tegra_vde_iommu_map':
>> drivers/staging/media/tegra-vde/iommu.c:39:9: error: implicit declaration of 
>> function 'iommu_map_sgtable'; did you mean 'dma_map_sgtable'? 
>> [-Werror=implicit-function-declaration]
      39 |  size = iommu_map_sgtable(vde->domain, addr, sgt,
         |         ^~~~~~~~~~~~~~~~~
         |         dma_map_sgtable
   cc1: some warnings being treated as errors

vim +39 drivers/staging/media/tegra-vde/iommu.c

    18  
    19  int tegra_vde_iommu_map(struct tegra_vde *vde,
    20                          struct sg_table *sgt,
    21                          struct iova **iovap,
    22                          size_t size)
    23  {
    24          struct iova *iova;
    25          unsigned long shift;
    26          unsigned long end;
    27          dma_addr_t addr;
    28  
    29          end = vde->domain->geometry.aperture_end;
    30          size = iova_align(&vde->iova, size);
    31          shift = iova_shift(&vde->iova);
    32  
    33          iova = alloc_iova(&vde->iova, size >> shift, end >> shift, 
true);
    34          if (!iova)
    35                  return -ENOMEM;
    36  
    37          addr = iova_dma_addr(&vde->iova, iova);
    38  
  > 39          size = iommu_map_sgtable(vde->domain, addr, sgt,
    40                                   IOMMU_READ | IOMMU_WRITE);
    41          if (!size) {
    42                  __free_iova(&vde->iova, iova);
    43                  return -ENXIO;
    44          }
    45  
    46          *iovap = iova;
    47  
    48          return 0;
    49  }
    50  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org

Attachment: .config.gz
Description: application/gzip

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