drivers/phy/mediatek/phy-mtk-tphy.c:955 mtk_phy_init() warn: 'instance->da_ref_clk' not released on lines: 952.

From: Dan Carpenter
Date: Fri May 14 2021 - 02:07:15 EST

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@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

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 }

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