---------- Forwarded message ---------- Date: Sun, 12 Jul 2020 11:15:29 +0800 From: kernel test robot <lkp(a)intel.com&gt; To: kbuild(a)lists.01.org Cc: lkp(a)intel.com, Julia Lawall <julia.lawall(a)lip6.fr&gt; Subject: drivers/gpu/drm/mediatek/mtk_dpi.c:721:2-9: line 721 is redundant because platform_get_irq() already prints an error CC: kbuild-all(a)lists.01.org CC: linux-kernel(a)vger.kernel.org TO: YueHaibing <yuehaibing(a)huawei.com&gt; CC: "Greg Kroah-Hartman" <gregkh(a)linuxfoundation.org&gt; CC: Stephen Boyd <swboyd(a)chromium.org&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0aea6d5c5be33ce94c16f9ab2f64de1f481f424b commit: ca7ce5a2710ad2a57bf7d0c4c712590bb69a5e1c coccinelle: platform_get_irq: Fix parse error date: 10 months ago :::::: branch date: 9 hours ago :::::: commit date: 10 months ago config: arm64-randconfig-c022-20200711 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Julia Lawall <julia.lawall(a)lip6.fr&gt; coccinelle warnings: (new ones prefixed by >>) -- # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout ca7ce5a2710ad2a57bf7d0c4c712590bb69a5e1c vim +721 drivers/gpu/drm/mediatek/mtk_dpi.c d08b5ab972449b0 chunhui dai 2018-10-03 674 9e629c17aa8d7a7 Jie Qiu 2016-01-04 675 static int mtk_dpi_probe(struct platform_device *pdev) 9e629c17aa8d7a7 Jie Qiu 2016-01-04 676 { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 677 struct device *dev = &pdev->dev; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 678 struct mtk_dpi *dpi; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 679 struct resource *mem; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 680 int comp_id; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 681 int ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 682 9e629c17aa8d7a7 Jie Qiu 2016-01-04 683 dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 684 if (!dpi) 9e629c17aa8d7a7 Jie Qiu 2016-01-04 685 return -ENOMEM; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 686 9e629c17aa8d7a7 Jie Qiu 2016-01-04 687 dpi->dev = dev; 0ace4b993c7a524 chunhui dai 2018-10-03 688 dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 689 9e629c17aa8d7a7 Jie Qiu 2016-01-04 690 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 691 dpi->regs = devm_ioremap_resource(dev, mem); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 692 if (IS_ERR(dpi->regs)) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 693 ret = PTR_ERR(dpi->regs); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 694 dev_err(dev, "Failed to ioremap mem resource: %d\n", ret); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 695 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 696 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 697 9e629c17aa8d7a7 Jie Qiu 2016-01-04 698 dpi->engine_clk = devm_clk_get(dev, "engine"); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 699 if (IS_ERR(dpi->engine_clk)) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 700 ret = PTR_ERR(dpi->engine_clk); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 701 dev_err(dev, "Failed to get engine clock: %d\n", ret); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 702 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 703 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 704 9e629c17aa8d7a7 Jie Qiu 2016-01-04 705 dpi->pixel_clk = devm_clk_get(dev, "pixel"); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 706 if (IS_ERR(dpi->pixel_clk)) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 707 ret = PTR_ERR(dpi->pixel_clk); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 708 dev_err(dev, "Failed to get pixel clock: %d\n", ret); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 709 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 710 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 711 9e629c17aa8d7a7 Jie Qiu 2016-01-04 712 dpi->tvd_clk = devm_clk_get(dev, "pll"); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 713 if (IS_ERR(dpi->tvd_clk)) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 714 ret = PTR_ERR(dpi->tvd_clk); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 715 dev_err(dev, "Failed to get tvdpll clock: %d\n", ret); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 716 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 717 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 718 9e629c17aa8d7a7 Jie Qiu 2016-01-04 719 dpi->irq = platform_get_irq(pdev, 0); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 720 if (dpi->irq <= 0) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 @721 dev_err(dev, "Failed to get irq: %d\n", dpi->irq); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 722 return -EINVAL; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 723 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 724 bcc97daee6b8120 chunhui dai 2018-10-03 725 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, bcc97daee6b8120 chunhui dai 2018-10-03 726 NULL, &dpi->bridge); bcc97daee6b8120 chunhui dai 2018-10-03 727 if (ret) bcc97daee6b8120 chunhui dai 2018-10-03 728 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 729 bcc97daee6b8120 chunhui dai 2018-10-03 730 dev_info(dev, "Found bridge node: %pOF\n", dpi->bridge->of_node); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 731 9e629c17aa8d7a7 Jie Qiu 2016-01-04 732 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 733 if (comp_id < 0) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 734 dev_err(dev, "Failed to identify by alias: %d\n", comp_id); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 735 return comp_id; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 736 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 737 9e629c17aa8d7a7 Jie Qiu 2016-01-04 738 ret = mtk_ddp_comp_init(dev, dev->of_node, &dpi->ddp_comp, comp_id, 9e629c17aa8d7a7 Jie Qiu 2016-01-04 739 &mtk_dpi_funcs); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 740 if (ret) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 741 dev_err(dev, "Failed to initialize component: %d\n", ret); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 742 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 743 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 744 9e629c17aa8d7a7 Jie Qiu 2016-01-04 745 platform_set_drvdata(pdev, dpi); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 746 9e629c17aa8d7a7 Jie Qiu 2016-01-04 747 ret = component_add(dev, &mtk_dpi_component_ops); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 748 if (ret) { 9e629c17aa8d7a7 Jie Qiu 2016-01-04 749 dev_err(dev, "Failed to add component: %d\n", ret); 9e629c17aa8d7a7 Jie Qiu 2016-01-04 750 return ret; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 751 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 752 9e629c17aa8d7a7 Jie Qiu 2016-01-04 753 return 0; 9e629c17aa8d7a7 Jie Qiu 2016-01-04 754 } 9e629c17aa8d7a7 Jie Qiu 2016-01-04 755 :::::: The code at line 721 was first introduced by commit :::::: 9e629c17aa8d7a75b8c1d99ed42892cd8ba7cdc4 drm/mediatek: Add DPI sub driver :::::: TO: Jie Qiu <jie.qiu(a)mediatek.com&gt; :::::: CC: Philipp Zabel <p.zabel(a)pengutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org