Hi Keguang, kernel test robot noticed the following build warnings: [auto build test WARNING on 048d8cb65cde9fe7534eb4440bcfddcf406bb49c] url: https://github.com/intel-lab-lkp/linux/commits/Keguang-Zhang-via-B4-Relay/dt-bindings-dma-Add-Loongson-1-APB-DMA/20240803-111220 base: 048d8cb65cde9fe7534eb4440bcfddcf406bb49c patch link: https://lore.kernel.org/r/20240802-loongson1-dma-v11-2-85392357d4e0%40gmail.com patch subject: [PATCH v11 2/2] dmaengine: Loongson1: Add Loongson-1 APB DMA driver config: sparc64-randconfig-r063-20240804 (https://download.01.org/0day-ci/archive/20240805/202408051242.8kGK28W7-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240805/202408051242.8kGK28W7-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202408051242.8kGK28W7-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/dma/loongson1-apb-dma.c: In function 'ls1x_dma_chan_probe': >> drivers/dma/loongson1-apb-dma.c:520:34: warning: '%u' directive writing between 1 and 10 bytes into a region of size 2 [-Wformat-overflow=] 520 | sprintf(pdev_irqname, "ch%u", chan_id); | ^~ drivers/dma/loongson1-apb-dma.c:520:31: note: directive argument in the range [0, 2147483646] 520 | sprintf(pdev_irqname, "ch%u", chan_id); | ^~~~~~ drivers/dma/loongson1-apb-dma.c:520:9: note: 'sprintf' output between 4 and 13 bytes into a destination of size 4 520 | sprintf(pdev_irqname, "ch%u", chan_id); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +520 drivers/dma/loongson1-apb-dma.c 510 511 static int ls1x_dma_chan_probe(struct platform_device *pdev, 512 struct ls1x_dma *dma, int chan_id) 513 { 514 struct device *dev = &pdev->dev; 515 struct ls1x_dma_chan *chan = &dma->chan[chan_id]; 516 char pdev_irqname[4]; 517 char *irqname; 518 int ret; 519 > 520 sprintf(pdev_irqname, "ch%u", chan_id); 521 chan->irq = platform_get_irq_byname(pdev, pdev_irqname); 522 if (chan->irq < 0) 523 return -ENODEV; 524 525 irqname = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", 526 dev_name(dev), pdev_irqname); 527 if (!irqname) 528 return -ENOMEM; 529 530 ret = devm_request_irq(dev, chan->irq, ls1x_dma_irq_handler, 531 IRQF_SHARED, irqname, chan); 532 if (ret) 533 return dev_err_probe(dev, ret, "failed to request IRQ %u\n", 534 chan->irq); 535 536 chan->reg_base = dma->reg_base; 537 chan->vchan.desc_free = ls1x_dma_free_desc; 538 vchan_init(&chan->vchan, &dma->ddev); 539 dev_info(dev, "%s (irq %d) initialized\n", pdev_irqname, chan->irq); 540 541 return 0; 542 } 543 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
