[intel-lts:5.10/android-civ 15431/23680] drivers/dma-buf/dma-heap.c:100:24: warning: returning 'long int' from a function with return type 'struct dma_buf *' makes pointer from integer without a cast

[intel-lts:5.10/android-civ 15431/23680] drivers/dma-buf/dma-heap.c:100:24: warning: returning 'long int' from a function with return type 'struct dma_buf *' makes pointer from integer without a cast

[kernel test robot]

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tree:   https://github.com/intel/linux-intel-lts.git 5.10/android-civ
head:   0e493748b235bf61d817dabdad2832ac4e932217
commit: 14a9cab5293224679fea27d71bef4cd3acc0c72c [15431/23680] Merge remote-tracking branch 'origin/5.10/yocto' into 5.10/android
config: ia64-randconfig-r002-20211202 (https://download.01.org/0day-ci/archive/20211202/202112021920.4UM5eC18-lkp(a)intel.com/config)
compiler: ia64-linux-gcc (GCC) 11.2.0
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
        # https://github.com/intel/linux-intel-lts/commit/14a9cab5293224679fea27d71bef4cd3acc0c72c
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts 5.10/android-civ
        git checkout 14a9cab5293224679fea27d71bef4cd3acc0c72c
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/dma-buf/

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

All warnings (new ones prefixed by >>):

   drivers/dma-buf/dma-heap.c: In function 'dma_heap_buffer_alloc':
>> drivers/dma-buf/dma-heap.c:100:24: warning: returning 'long int' from a function with return type 'struct dma_buf *' makes pointer from integer without a cast [-Wint-conversion]
     100 |                 return PTR_ERR(dmabuf);
         |                        ^~~~~~~~~~~~~~~
>> drivers/dma-buf/dma-heap.c:107:16: warning: returning 'int' from a function with return type 'struct dma_buf *' makes pointer from integer without a cast [-Wint-conversion]
     107 |         return fd;
         |                ^~


vim +100 drivers/dma-buf/dma-heap.c

349e8360c9c85c9 John Stultz     2020-08-14   77  
349e8360c9c85c9 John Stultz     2020-08-14   78  struct dma_buf *dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
c02a81fba74fe34 Andrew F. Davis 2019-12-03   79  				      unsigned int fd_flags,
c02a81fba74fe34 Andrew F. Davis 2019-12-03   80  				      unsigned int heap_flags)
c02a81fba74fe34 Andrew F. Davis 2019-12-03   81  {
1998121ad755410 John Stultz     2021-01-19   82  	struct dma_buf *dmabuf;
1998121ad755410 John Stultz     2021-01-19   83  	int fd;
1998121ad755410 John Stultz     2021-01-19   84  
fc1310ebf8fe25e John Stultz     2020-05-05   85  	if (fd_flags & ~DMA_HEAP_VALID_FD_FLAGS)
349e8360c9c85c9 John Stultz     2020-08-14   86  		return ERR_PTR(-EINVAL);
fc1310ebf8fe25e John Stultz     2020-05-05   87  
fc1310ebf8fe25e John Stultz     2020-05-05   88  	if (heap_flags & ~DMA_HEAP_VALID_HEAP_FLAGS)
349e8360c9c85c9 John Stultz     2020-08-14   89  		return ERR_PTR(-EINVAL);
c02a81fba74fe34 Andrew F. Davis 2019-12-03   90  	/*
c02a81fba74fe34 Andrew F. Davis 2019-12-03   91  	 * Allocations from all heaps have to begin
c02a81fba74fe34 Andrew F. Davis 2019-12-03   92  	 * and end on page boundaries.
c02a81fba74fe34 Andrew F. Davis 2019-12-03   93  	 */
c02a81fba74fe34 Andrew F. Davis 2019-12-03   94  	len = PAGE_ALIGN(len);
c02a81fba74fe34 Andrew F. Davis 2019-12-03   95  	if (!len)
349e8360c9c85c9 John Stultz     2020-08-14   96  		return ERR_PTR(-EINVAL);
c02a81fba74fe34 Andrew F. Davis 2019-12-03   97  
1998121ad755410 John Stultz     2021-01-19   98  	dmabuf = heap->ops->allocate(heap, len, fd_flags, heap_flags);
1998121ad755410 John Stultz     2021-01-19   99  	if (IS_ERR(dmabuf))
1998121ad755410 John Stultz     2021-01-19 @100  		return PTR_ERR(dmabuf);
1998121ad755410 John Stultz     2021-01-19  101  
1998121ad755410 John Stultz     2021-01-19  102  	fd = dma_buf_fd(dmabuf, fd_flags);
1998121ad755410 John Stultz     2021-01-19  103  	if (fd < 0) {
1998121ad755410 John Stultz     2021-01-19  104  		dma_buf_put(dmabuf);
1998121ad755410 John Stultz     2021-01-19  105  		/* just return, as put will call release and that will free */
1998121ad755410 John Stultz     2021-01-19  106  	}
1998121ad755410 John Stultz     2021-01-19 @107  	return fd;
c02a81fba74fe34 Andrew F. Davis 2019-12-03  108  }
8e1ec97355ef992 John Stultz     2020-05-05  109  EXPORT_SYMBOL_GPL(dma_heap_buffer_alloc);
c02a81fba74fe34 Andrew F. Davis 2019-12-03  110  

:::::: The code@line 100 was first introduced by commit
:::::: 1998121ad755410f4a617676863177d7e4cc0cc6 dma-buf: heaps: Rework heap allocation hooks to return struct dma_buf instead of fd

:::::: TO: John Stultz <john.stultz@linaro.org>
:::::: CC: Dutta, Ranjan <ranjan.dutta@intel.com>

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