tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.4 head: 9dbb318936be022de92f893824a3c93f4ab856c1 commit: 9add50386637e888e96183167ff28bf831173c53 [95/109] FROMLIST: of: Add plumbing for restricted DMA pool config: sparc-defconfig (attached as .config) compiler: sparc-linux-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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-5.4 git checkout 9add50386637e888e96183167ff28bf831173c53 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/of/device.c: In function 'of_dma_configure': 172 | return of_dma_set_restricted_buffer(dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ | of_dma_get_restricted_buffer cc1: some warnings being treated as errors vim +172 drivers/of/device.c 74 75 /** 76 * of_dma_configure - Setup DMA configuration 77 * @dev: Device to apply DMA configuration 78 * @np: Pointer to OF node having DMA configuration 79 * @force_dma: Whether device is to be set up by of_dma_configure() even if 80 * DMA capability is not explicitly described by firmware. 81 * 82 * Try to get devices's DMA configuration from DT and update it 83 * accordingly. 84 * 85 * If platform code needs to use its own special DMA configuration, it 86 * can use a platform bus notifier and handle BUS_NOTIFY_ADD_DEVICE events 87 * to fix up DMA configuration. 88 */ 89 int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma) 90 { 91 u64 dma_addr, paddr, size = 0; 92 int ret; 93 bool coherent; 94 unsigned long offset; 95 const struct iommu_ops *iommu; 96 u64 mask; 97 98 ret = of_dma_get_range(np, &dma_addr, &paddr, &size); 99 if (ret < 0) { 100 /* 101 * For legacy reasons, we have to assume some devices need 102 * DMA configuration regardless of whether "dma-ranges" is 103 * correctly specified or not. 104 */ 105 if (!force_dma) 106 return ret == -ENODEV ? 0 : ret; 107 108 dma_addr = offset = 0; 109 } else { 110 offset = PFN_DOWN(paddr - dma_addr); 111 112 /* 113 * Add a work around to treat the size as mask + 1 in case 114 * it is defined in DT as a mask. 115 */ 116 if (size & 1) { 117 dev_warn(dev, "Invalid size 0x%llx for dma-range\n", 118 size); 119 size = size + 1; 120 } 121 122 if (!size) { 123 dev_err(dev, "Adjusted size 0x%llx invalid\n", size); 124 return -EINVAL; 125 } 126 dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", offset); 127 } 128 129 /* 130 * If @dev is expected to be DMA-capable then the bus code that created 131 * it should have initialised its dma_mask pointer by this point. For 132 * now, we'll continue the legacy behaviour of coercing it to the 133 * coherent mask if not, but we'll no longer do so quietly. 134 */ 135 if (!dev->dma_mask) { 136 dev_warn(dev, "DMA mask not set\n"); 137 dev->dma_mask = &dev->coherent_dma_mask; 138 } 139 140 if (!size && dev->coherent_dma_mask) 141 size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1); 142 else if (!size) 143 size = 1ULL << 32; 144 145 dev->dma_pfn_offset = offset; 146 147 /* 148 * Limit coherent and dma mask based on size and default mask 149 * set by the driver. 150 */ 151 mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1); 152 dev->coherent_dma_mask &= mask; 153 *dev->dma_mask &= mask; 154 /* ...but only set bus mask if we found valid dma-ranges earlier */ 155 if (!ret) 156 dev->bus_dma_mask = mask; 157 158 coherent = of_dma_is_coherent(np); 159 dev_dbg(dev, "device is%sdma coherent\n", 160 coherent ? " " : " not "); 161 162 iommu = of_iommu_configure(dev, np); 163 if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER) 164 return -EPROBE_DEFER; 165 166 dev_dbg(dev, "device is%sbehind an iommu\n", 167 iommu ? " " : " not "); 168 169 arch_setup_dma_ops(dev, dma_addr, size, iommu, coherent); 170 171 if (!iommu) 173 174 return 0; 175 } 176 EXPORT_SYMBOL_GPL(of_dma_configure); 177 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org