Hi Tiezhu, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: adc12a7407b28c0f257227a508db83ab00911b74 commit: 133552bf03edbe3892767a4b64c56e3bed746374 phy: Remove CONFIG_ARCH_* check for related subdir in Makefile config: powerpc-randconfig-m031-20210513 (attached as .config) compiler: powerpc-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: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: drivers/phy/mediatek/phy-mtk-tphy.c:955 mtk_phy_init() warn: 'instance->da_ref_clk' not released on lines: 952. drivers/phy/mediatek/phy-mtk-tphy.c:955 mtk_phy_init() warn: 'instance->ref_clk' not released on lines: 952. vim +955 drivers/phy/mediatek/phy-mtk-tphy.c cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 917 static int mtk_phy_init(struct phy *phy) dc7f190fd51f5c drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2015-09-29 918 { cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 919 struct mtk_phy_instance *instance = phy_get_drvdata(phy); cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 920 struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent); dc7f190fd51f5c drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2015-09-29 921 int ret; dc7f190fd51f5c drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2015-09-29 922 15de15c6b45b87 drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2017-03-31 923 ret = clk_prepare_enable(instance->ref_clk); 15de15c6b45b87 drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2017-03-31 924 if (ret) { cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 925 dev_err(tphy->dev, "failed to enable ref_clk\n"); 15de15c6b45b87 drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2017-03-31 926 return ret; 15de15c6b45b87 drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2017-03-31 927 } 15de15c6b45b87 drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2017-03-31 928 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 929 ret = clk_prepare_enable(instance->da_ref_clk); 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 930 if (ret) { 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 931 dev_err(tphy->dev, "failed to enable da_ref\n"); 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 932 clk_disable_unprepare(instance->ref_clk); 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 933 return ret; 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 934 } 12d0c0bed3f473 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2020-02-11 935 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 936 switch (instance->type) { 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 937 case PHY_TYPE_USB2: cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 938 u2_phy_instance_init(tphy, instance); 8158e917d91cb0 drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2018-06-29 939 u2_phy_props_set(tphy, instance); 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 940 break; 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 941 case PHY_TYPE_USB3: cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 942 u3_phy_instance_init(tphy, instance); 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 943 break; 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 944 case PHY_TYPE_PCIE: cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 945 pcie_phy_instance_init(tphy, instance); 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 946 break; 4ab26cb66a8cb3 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 947 case PHY_TYPE_SATA: cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 948 sata_phy_instance_init(tphy, instance); 4ab26cb66a8cb3 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 949 break; 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 950 default: cd4ec4b03dc15b drivers/phy/mediatek/phy-mtk-tphy.c Chunfeng Yun 2017-08-03 951 dev_err(tphy->dev, "incompatible PHY type\n"); 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 952 return -EINVAL; clk_disable_unprepare()? 44a6d6ce6436a2 drivers/phy/phy-mt65xx-usb3.c Ryder Lee 2017-08-03 953 } 04466efca58f69 drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2017-03-31 954 dc7f190fd51f5c drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2015-09-29 @955 return 0; dc7f190fd51f5c drivers/phy/phy-mt65xx-usb3.c Chunfeng Yun 2015-09-29 956 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org