Re: [PATCH net/next 3/3] net: ethernet: mtk_eth_soc: use genpool allocator for SRAM

[kernel test robot <lkp@intel.com>]

Hi Daniel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]
[also build test WARNING on next-20250627]
[cannot apply to net/main linus/master v6.16-rc3]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Golle/net-ethernet-mtk_eth_soc-improve-support-for-named-interrupts/20250628-093324
base:   net-next/main
patch link:    https://lore.kernel.org/r/566ca90fc59ad0d3aff8bc8dc22ebaf0544bce47.1751072868.git.daniel%40makrotopia.org
patch subject: [PATCH net/next 3/3] net: ethernet: mtk_eth_soc: use genpool allocator for SRAM
config: arm-randconfig-003-20250629 (https://download.01.org/0day-ci/archive/20250629/202506290403.FwUOUzZq-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250629/202506290403.FwUOUzZq-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506290403.FwUOUzZq-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/mediatek/mtk_eth_soc.c: In function 'mtk_dma_ring_alloc':
>> drivers/net/ethernet/mediatek/mtk_eth_soc.c:1282:10: warning: returning 'int' from a function with return type 'void *' makes pointer from integer without a cast [-Wint-conversion]
      return -ENOMEM;
             ^


vim +1282 drivers/net/ethernet/mediatek/mtk_eth_soc.c

  1275	
  1276	static void *mtk_dma_ring_alloc(struct mtk_eth *eth, size_t size,
  1277					dma_addr_t *dma_handle)
  1278	{
  1279		void *dma_ring;
  1280	
  1281		if (WARN_ON(mtk_use_legacy_sram(eth)))
> 1282			return -ENOMEM;
  1283	
  1284		if (eth->sram_pool) {
  1285			dma_ring = (void *)gen_pool_alloc(eth->sram_pool, size);
  1286			if (!dma_ring)
  1287				return dma_ring;
  1288			*dma_handle = gen_pool_virt_to_phys(eth->sram_pool, (unsigned long)dma_ring);
  1289		} else {
  1290			dma_ring = dma_alloc_coherent(eth->dma_dev, size, dma_handle,
  1291						      GFP_KERNEL);
  1292		}
  1293	
  1294		return dma_ring;
  1295	}
  1296	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki