tree: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next head: 2cef560d05dd1355fc612c9c9ad061337adc4d59 commit: 690dd9ce04f6a1b319bcb211ee0b3e125a4fa4f2 [3/6] hwmon: Support ADI Fan Control IP config: c6x-allyesconfig (attached as .config) compiler: c6x-elf-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 690dd9ce04f6a1b319bcb211ee0b3e125a4fa4f2 # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=c6x If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers//hwmon/axi-fan-control.c: In function 'axi_fan_control_probe': >> drivers//hwmon/axi-fan-control.c:419:26: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized] (unsigned long long)res->start, ctl->base); ^~ vim +/res +419 drivers//hwmon/axi-fan-control.c 385 386 static int axi_fan_control_probe(struct platform_device *pdev) 387 { 388 struct axi_fan_control_data *ctl; 389 struct clk *clk; 390 const struct of_device_id *id; 391 const char *name = "axi_fan_control"; 392 struct resource *res; 393 u32 version; 394 int ret; 395 396 id = of_match_node(axi_fan_control_of_match, pdev->dev.of_node); 397 if (!id) 398 return -EINVAL; 399 400 ctl = devm_kzalloc(&pdev->dev, sizeof(*ctl), GFP_KERNEL); 401 if (!ctl) 402 return -ENOMEM; 403 404 ctl->base = devm_platform_ioremap_resource(pdev, 0); 405 if (IS_ERR(ctl->base)) 406 return PTR_ERR(ctl->base); 407 408 clk = devm_clk_get(&pdev->dev, NULL); 409 if (IS_ERR(clk)) { 410 dev_err(&pdev->dev, "clk_get failed with %ld\n", PTR_ERR(clk)); 411 return PTR_ERR(clk); 412 } 413 414 ctl->clk_rate = clk_get_rate(clk); 415 if (!ctl->clk_rate) 416 return -EINVAL; 417 418 dev_dbg(&pdev->dev, "Re-mapped from 0x%08llX to %p\n", > 419 (unsigned long long)res->start, ctl->base); 420 421 version = axi_ioread(ADI_AXI_REG_VERSION, ctl); 422 if (ADI_AXI_PCORE_VER_MAJOR(version) != 423 ADI_AXI_PCORE_VER_MAJOR((*(u32 *)id->data))) { 424 dev_err(&pdev->dev, "Major version mismatch. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n", 425 ADI_AXI_PCORE_VER_MAJOR((*(u32 *)id->data)), 426 ADI_AXI_PCORE_VER_MINOR((*(u32 *)id->data)), 427 ADI_AXI_PCORE_VER_PATCH((*(u32 *)id->data)), 428 ADI_AXI_PCORE_VER_MAJOR(version), 429 ADI_AXI_PCORE_VER_MINOR(version), 430 ADI_AXI_PCORE_VER_PATCH(version)); 431 return -ENODEV; 432 } 433 434 ctl->irq = platform_get_irq(pdev, 0); 435 if (ctl->irq < 0) 436 return ctl->irq; 437 438 ret = devm_request_threaded_irq(&pdev->dev, ctl->irq, NULL, 439 axi_fan_control_irq_handler, 440 IRQF_ONESHOT | IRQF_TRIGGER_HIGH, 441 pdev->driver_override, ctl); 442 if (ret) { 443 dev_err(&pdev->dev, "failed to request an irq, %d", ret); 444 return ret; 445 } 446 447 ret = axi_fan_control_init(ctl, pdev->dev.of_node); 448 if (ret) { 449 dev_err(&pdev->dev, "Failed to initialize device\n"); 450 return ret; 451 } 452 453 ctl->hdev = devm_hwmon_device_register_with_info(&pdev->dev, 454 name, 455 ctl, 456 &axi_chip_info, 457 NULL); 458 459 return PTR_ERR_OR_ZERO(ctl->hdev); 460 } 461 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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