tree: git://git.infradead.org/users/hch/misc.git dma-bypass.5 head: 80ac26860d23173c1c10beeaf76f3f0cf23942f1 commit: 8e1e62260cf3e8f1255de8c5f65c633b5e54bb5c [7/9] dma-mapping: make support for dma ops optional config: i386-randconfig-a013-20200711 (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 reproduce (this is a W=1 build): git checkout 8e1e62260cf3e8f1255de8c5f65c633b5e54bb5c # save the attached .config to linux build tree make W=1 ARCH=i386 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/infiniband/core/device.c: In function 'setup_dma_device': 1186 | if (device->dev.dma_ops) { | ^ vim +1186 drivers/infiniband/core/device.c 0df91bb67334ee Jason Gunthorpe 2019-02-06 1180 548cb4fbe80d68 Parav Pandit 2018-10-17 1181 static void setup_dma_device(struct ib_device *device) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1182 { 99db9494035f5b Bart Van Assche 2017-01-20 1183 struct device *parent = device->dev.parent; 99db9494035f5b Bart Van Assche 2017-01-20 1184 0957c29f78af7d Bart Van Assche 2017-03-07 1185 WARN_ON_ONCE(device->dma_device); 0957c29f78af7d Bart Van Assche 2017-03-07 @1186 if (device->dev.dma_ops) { 0957c29f78af7d Bart Van Assche 2017-03-07 1187 /* 0957c29f78af7d Bart Van Assche 2017-03-07 1188 * The caller provided custom DMA operations. Copy the 0957c29f78af7d Bart Van Assche 2017-03-07 1189 * DMA-related fields that are used by e.g. dma_alloc_coherent() 0957c29f78af7d Bart Van Assche 2017-03-07 1190 * into device->dev. 0957c29f78af7d Bart Van Assche 2017-03-07 1191 */ 0957c29f78af7d Bart Van Assche 2017-03-07 1192 device->dma_device = &device->dev; 02ee9da3478736 Bart Van Assche 2018-01-03 1193 if (!device->dev.dma_mask) { 02ee9da3478736 Bart Van Assche 2018-01-03 1194 if (parent) 99db9494035f5b Bart Van Assche 2017-01-20 1195 device->dev.dma_mask = parent->dma_mask; 02ee9da3478736 Bart Van Assche 2018-01-03 1196 else 02ee9da3478736 Bart Van Assche 2018-01-03 1197 WARN_ON_ONCE(true); 02ee9da3478736 Bart Van Assche 2018-01-03 1198 } 02ee9da3478736 Bart Van Assche 2018-01-03 1199 if (!device->dev.coherent_dma_mask) { 02ee9da3478736 Bart Van Assche 2018-01-03 1200 if (parent) 0957c29f78af7d Bart Van Assche 2017-03-07 1201 device->dev.coherent_dma_mask = 0957c29f78af7d Bart Van Assche 2017-03-07 1202 parent->coherent_dma_mask; 02ee9da3478736 Bart Van Assche 2018-01-03 1203 else 02ee9da3478736 Bart Van Assche 2018-01-03 1204 WARN_ON_ONCE(true); 02ee9da3478736 Bart Van Assche 2018-01-03 1205 } 0957c29f78af7d Bart Van Assche 2017-03-07 1206 } else { 0957c29f78af7d Bart Van Assche 2017-03-07 1207 /* 0957c29f78af7d Bart Van Assche 2017-03-07 1208 * The caller did not provide custom DMA operations. Use the 0957c29f78af7d Bart Van Assche 2017-03-07 1209 * DMA mapping operations of the parent device. 0957c29f78af7d Bart Van Assche 2017-03-07 1210 */ 02ee9da3478736 Bart Van Assche 2018-01-03 1211 WARN_ON_ONCE(!parent); 0957c29f78af7d Bart Van Assche 2017-03-07 1212 device->dma_device = parent; 0957c29f78af7d Bart Van Assche 2017-03-07 1213 } d10bcf947a3ea2 Shiraz Saleem 2019-04-02 1214 c9121262d57b8a Bart Van Assche 2019-10-25 1215 if (!device->dev.dma_parms) { c9121262d57b8a Bart Van Assche 2019-10-25 1216 if (parent) { c9121262d57b8a Bart Van Assche 2019-10-25 1217 /* c9121262d57b8a Bart Van Assche 2019-10-25 1218 * The caller did not provide DMA parameters, so c9121262d57b8a Bart Van Assche 2019-10-25 1219 * 'parent' probably represents a PCI device. The PCI c9121262d57b8a Bart Van Assche 2019-10-25 1220 * core sets the maximum segment size to 64 c9121262d57b8a Bart Van Assche 2019-10-25 1221 * KB. Increase this parameter to 2 GB. c9121262d57b8a Bart Van Assche 2019-10-25 1222 */ c9121262d57b8a Bart Van Assche 2019-10-25 1223 device->dev.dma_parms = parent->dma_parms; c9121262d57b8a Bart Van Assche 2019-10-25 1224 dma_set_max_seg_size(device->dma_device, SZ_2G); c9121262d57b8a Bart Van Assche 2019-10-25 1225 } else { c9121262d57b8a Bart Van Assche 2019-10-25 1226 WARN_ON_ONCE(true); c9121262d57b8a Bart Van Assche 2019-10-25 1227 } c9121262d57b8a Bart Van Assche 2019-10-25 1228 } e349f858d29f30 Jason Gunthorpe 2018-09-25 1229 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1230 :::::: The code at line 1186 was first introduced by commit :::::: 0957c29f78af7d890c4ac506eda8f76bfc5a137a IB/core: Restore I/O MMU, s390 and powerpc support :::::: TO: Bart Van Assche <bart.vanassche(a)sandisk.com&gt; :::::: CC: Doug Ledford <dledford(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org