tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 92edc4aef86780a8ad01b092c6d6630bb3cb423d commit: 86609baa421735ab27c3b08db5bf18a96cc2132f [201/5794] soc: aspeed: xdma: Add user interface config: m68k-randconfig-s031-20201115 (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-107-gaf3512a6-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 86609baa421735ab27c3b08db5bf18a96cc2132f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/soc/aspeed/aspeed-xdma.c:453:39: sparse: got struct aspeed_xdma_cmd * vim +453 drivers/soc/aspeed/aspeed-xdma.c 0f6a7063f38520 Eddie James 2020-05-05 422 0f6a7063f38520 Eddie James 2020-05-05 423 static int aspeed_xdma_start(struct aspeed_xdma *ctx, unsigned int num_cmds, 0f6a7063f38520 Eddie James 2020-05-05 424 struct aspeed_xdma_cmd cmds[2], bool upstream, 0f6a7063f38520 Eddie James 2020-05-05 425 struct aspeed_xdma_client *client) 0f6a7063f38520 Eddie James 2020-05-05 426 { 0f6a7063f38520 Eddie James 2020-05-05 427 unsigned int i; 0f6a7063f38520 Eddie James 2020-05-05 428 int rc = -EBUSY; 0f6a7063f38520 Eddie James 2020-05-05 429 unsigned long flags; 0f6a7063f38520 Eddie James 2020-05-05 430 0f6a7063f38520 Eddie James 2020-05-05 431 spin_lock_irqsave(&ctx->engine_lock, flags); 0f6a7063f38520 Eddie James 2020-05-05 432 if (ctx->in_reset) 0f6a7063f38520 Eddie James 2020-05-05 433 goto unlock; 0f6a7063f38520 Eddie James 2020-05-05 434 0f6a7063f38520 Eddie James 2020-05-05 435 spin_lock(&ctx->client_lock); 0f6a7063f38520 Eddie James 2020-05-05 436 if (ctx->current_client) { 0f6a7063f38520 Eddie James 2020-05-05 437 spin_unlock(&ctx->client_lock); 0f6a7063f38520 Eddie James 2020-05-05 438 goto unlock; 0f6a7063f38520 Eddie James 2020-05-05 439 } 0f6a7063f38520 Eddie James 2020-05-05 440 0f6a7063f38520 Eddie James 2020-05-05 441 client->error = false; 0f6a7063f38520 Eddie James 2020-05-05 442 client->in_progress = true; 0f6a7063f38520 Eddie James 2020-05-05 443 ctx->current_client = client; 0f6a7063f38520 Eddie James 2020-05-05 444 spin_unlock(&ctx->client_lock); 0f6a7063f38520 Eddie James 2020-05-05 445 0f6a7063f38520 Eddie James 2020-05-05 446 ctx->upstream = upstream; 0f6a7063f38520 Eddie James 2020-05-05 447 for (i = 0; i < num_cmds; ++i) { 0f6a7063f38520 Eddie James 2020-05-05 448 /* 0f6a7063f38520 Eddie James 2020-05-05 449 * Use memcpy_toio here to get some barriers before starting 0f6a7063f38520 Eddie James 2020-05-05 450 * the operation. The command(s) need to be in physical memory 0f6a7063f38520 Eddie James 2020-05-05 451 * before the XDMA engine starts. 0f6a7063f38520 Eddie James 2020-05-05 452 */ 0f6a7063f38520 Eddie James 2020-05-05 @453 memcpy_toio(&ctx->cmdq[ctx->cmd_idx], &cmds[i], 0f6a7063f38520 Eddie James 2020-05-05 454 sizeof(struct aspeed_xdma_cmd)); 0f6a7063f38520 Eddie James 2020-05-05 455 ctx->cmd_idx = (ctx->cmd_idx + 1) % XDMA_NUM_CMDS; 0f6a7063f38520 Eddie James 2020-05-05 456 } 0f6a7063f38520 Eddie James 2020-05-05 457 0f6a7063f38520 Eddie James 2020-05-05 458 aspeed_xdma_writel(ctx, ctx->chip->regs.bmc_cmdq_writep, 0f6a7063f38520 Eddie James 2020-05-05 459 ctx->cmd_idx * ctx->chip->queue_entry_size); 0f6a7063f38520 Eddie James 2020-05-05 460 rc = 0; 0f6a7063f38520 Eddie James 2020-05-05 461 0f6a7063f38520 Eddie James 2020-05-05 462 unlock: 0f6a7063f38520 Eddie James 2020-05-05 463 spin_unlock_irqrestore(&ctx->engine_lock, flags); 0f6a7063f38520 Eddie James 2020-05-05 464 return rc; 0f6a7063f38520 Eddie James 2020-05-05 465 } 0f6a7063f38520 Eddie James 2020-05-05 466 :::::: The code at line 453 was first introduced by commit :::::: 0f6a7063f38520a50bd2c9ed02f00e3d8646c2ad soc: aspeed: Add XDMA Engine Driver :::::: TO: Eddie James <eajames(a)linux.ibm.com&gt; :::::: CC: Joel Stanley <joel(a)jms.id.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org