Hi Ben, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.8-rc5 next-20200715] [cannot apply to xlnx/master remoteproc/for-next rpmsg/for-next] [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] url: https://github.com/0day-ci/linux/commits/Ben-Levinsky/Provide-basic-drive... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git e9919e11e219eaa5e8041b7b1a196839143e9125 config: arm64-allyesconfig (attached as .config) compiler: aarch64-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 267 | struct rproc_mem_entry *handle_tcm_parsing(struct device *dev, | ^~~~~~~~~~~~~~~~~~ drivers/remoteproc/zynqmp_r5_remoteproc.c: In function 'handle_tcm_parsing': 286 | return -EINVAL; | ^ drivers/remoteproc/zynqmp_r5_remoteproc.c:293:10: warning: returning 'int' from a function with return type 'struct rproc_mem_entry *' makes pointer from integer without a cast [-Wint-conversion] 293 | return -EINVAL; | ^ drivers/remoteproc/zynqmp_r5_remoteproc.c:298:10: warning: returning 'int' from a function with return type 'struct rproc_mem_entry *' makes pointer from integer without a cast [-Wint-conversion] 298 | return -ENOMEM; | ^ drivers/remoteproc/zynqmp_r5_remoteproc.c:317:10: warning: returning 'int' from a function with return type 'struct rproc_mem_entry *' makes pointer from integer without a cast [-Wint-conversion] 317 | return -ENOMEM; | ^ vim +/handle_tcm_parsing +267 drivers/remoteproc/zynqmp_r5_remoteproc.c 263 264 /* 265 * TCM needs mapping to R5 relative address and xilinx platform mgmt call 266 */ 268 struct reserved_mem *rmem, 269 struct device_node *node, 270 int lookup_idx) 271 { 272 void *va; 273 dma_addr_t dma; 274 resource_size_t size; 275 int ret; 276 u32 pnode_id; 277 struct resource rsc; 278 struct rproc_mem_entry *mem; 279 280 pnode_id = tcm_addr_to_pnode[lookup_idx][1]; 281 ret = zynqmp_pm_request_node(pnode_id, 282 ZYNQMP_PM_CAPABILITY_ACCESS, 0, 283 ZYNQMP_PM_REQUEST_ACK_BLOCKING); 284 if (ret < 0) { 285 dev_err(dev, "failed to request power node: %u\n", pnode_id); 287 } 288 289 ret = of_address_to_resource(node, 0, &rsc); 290 if (ret < 0) { 291 dev_err(dev, "failed to get resource of memory %s", 292 of_node_full_name(node)); 293 return -EINVAL; 294 } 295 size = resource_size(&rsc); 296 va = devm_ioremap_wc(dev, rsc.start, size); 297 if (!va) 298 return -ENOMEM; 299 300 /* zero out tcm base address */ 301 if (rsc.start & 0xffe00000) { 302 /* R5 can't see anything past 0xfffff so wipe it */ 303 rsc.start &= 0x000fffff; 304 /* 305 * handle tcm banks 1 a and b (0xffe9000 and 306 * 0xffeb0000) 307 */ 308 if (rsc.start & 0x80000) 309 rsc.start -= 0x90000; 310 } 311 312 dma = (dma_addr_t)rsc.start; 313 mem = rproc_mem_entry_init(dev, va, dma, (int)size, rsc.start, 314 NULL, zynqmp_r5_mem_release, 315 rsc.name); 316 if (!mem) 317 return -ENOMEM; 318 319 return mem; 320 } 321 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org