drivers/phy/renesas/phy-rcar-gen3-usb2.c:747 rcar_gen3_phy_usb2_probe() warn: missing error code 'ret'
From: Dan Carpenter
Date: Mon May 22 2023 - 10:56:30 EST
Hi Lad,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 44c026a73be8038f03dbdeef028b642880cf1511
commit: 8292493c22c8e28b6e67a01e0f5c6db1cf231eb1 riscv: Kconfig.socs: Add ARCH_RENESAS kconfig option
config: riscv-randconfig-m031-20230522 (https://download.01.org/0day-ci/archive/20230522/202305222220.VHYVac04-lkp@xxxxxxxxx/config)
compiler: riscv64-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Reported-by: Dan Carpenter <error27@xxxxxxxxx>
| Closes: https://lore.kernel.org/r/202305222220.VHYVac04-lkp@xxxxxxxxx/
smatch warnings:
drivers/phy/renesas/phy-rcar-gen3-usb2.c:747 rcar_gen3_phy_usb2_probe() warn: missing error code 'ret'
vim +/ret +747 drivers/phy/renesas/phy-rcar-gen3-usb2.c
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 652 static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 653 {
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 654 const struct rcar_gen3_phy_drv_data *phy_data;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 655 struct device *dev = &pdev->dev;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 656 struct rcar_gen3_chan *channel;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 657 struct phy_provider *provider;
08b0ad375ca661 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2020-07-17 658 int ret = 0, i;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 659
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 660 if (!dev->of_node) {
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 661 dev_err(dev, "This driver needs device tree\n");
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 662 return -EINVAL;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 663 }
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 664
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 665 channel = devm_kzalloc(dev, sizeof(*channel), GFP_KERNEL);
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 666 if (!channel)
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 667 return -ENOMEM;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 668
0b5604affbec02 drivers/phy/renesas/phy-rcar-gen3-usb2.c Chunfeng Yun 2020-11-06 669 channel->base = devm_platform_ioremap_resource(pdev, 0);
801a69c787812f drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 670 if (IS_ERR(channel->base))
801a69c787812f drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 671 return PTR_ERR(channel->base);
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 672
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 673 channel->obint_enable_bits = USB2_OBINT_BITS;
08b0ad375ca661 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2020-07-17 674 /* get irq number here and request_irq for OTG in phy_init */
08b0ad375ca661 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2020-07-17 675 channel->irq = platform_get_irq_optional(pdev, 0);
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 676 channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
73801b90a38ff1 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2018-09-21 677 if (channel->dr_mode != USB_DR_MODE_UNKNOWN) {
7e0540f41332cb drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-10-12 678 int ret;
7e0540f41332cb drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-10-12 679
979b519c7a1bff drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2018-09-21 680 channel->is_otg_channel = true;
8dde0008ffc9e2 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2018-09-21 681 channel->uses_otg_pins = !of_property_read_bool(dev->of_node,
8dde0008ffc9e2 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2018-09-21 682 "renesas,no-otg-pins");
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 683 channel->extcon = devm_extcon_dev_allocate(dev,
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 684 rcar_gen3_phy_cable);
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 685 if (IS_ERR(channel->extcon))
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 686 return PTR_ERR(channel->extcon);
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 687
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 688 ret = devm_extcon_dev_register(dev, channel->extcon);
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 689 if (ret < 0) {
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 690 dev_err(dev, "Failed to register extcon\n");
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 691 return ret;
2b38543c8db1c7 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-04-29 692 }
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 693 }
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 694
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 695 /*
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 696 * devm_phy_create() will call pm_runtime_enable(&phy->dev);
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 697 * And then, phy-core will manage runtime pm for this device.
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 698 */
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 699 pm_runtime_enable(dev);
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 700
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 701 phy_data = of_device_get_match_data(dev);
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 702 if (!phy_data) {
51e339deab1e51 drivers/phy/renesas/phy-rcar-gen3-usb2.c Wang Li 2020-11-26 703 ret = -EINVAL;
51e339deab1e51 drivers/phy/renesas/phy-rcar-gen3-usb2.c Wang Li 2020-11-26 704 goto error;
51e339deab1e51 drivers/phy/renesas/phy-rcar-gen3-usb2.c Wang Li 2020-11-26 705 }
5d8042e95fd471 drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2019-04-10 706
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 707 channel->soc_no_adp_ctrl = phy_data->no_adp_ctrl;
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 708 if (phy_data->no_adp_ctrl)
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 709 channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 710
5c9dc6379f539c drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-06-10 711 mutex_init(&channel->lock);
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 712 for (i = 0; i < NUM_OF_PHYS; i++) {
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 713 channel->rphys[i].phy = devm_phy_create(dev, NULL,
b0512a6ec0cd6d drivers/phy/renesas/phy-rcar-gen3-usb2.c Biju Das 2021-07-27 714 phy_data->phy_usb2_ops);
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 715 if (IS_ERR(channel->rphys[i].phy)) {
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 716 dev_err(dev, "Failed to create USB2 PHY\n");
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 717 ret = PTR_ERR(channel->rphys[i].phy);
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 718 goto error;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 719 }
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 720 channel->rphys[i].ch = channel;
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 721 channel->rphys[i].int_enable_bits = rcar_gen3_int_enable[i];
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 722 phy_set_drvdata(channel->rphys[i].phy, &channel->rphys[i]);
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 723 }
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 724
6dcfd7c300bf35 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 725 channel->vbus = devm_regulator_get_optional(dev, "vbus");
6dcfd7c300bf35 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 726 if (IS_ERR(channel->vbus)) {
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 727 if (PTR_ERR(channel->vbus) == -EPROBE_DEFER) {
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 728 ret = PTR_ERR(channel->vbus);
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 729 goto error;
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 730 }
6dcfd7c300bf35 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 731 channel->vbus = NULL;
6dcfd7c300bf35 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 732 }
6dcfd7c300bf35 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-03-03 733
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 734 platform_set_drvdata(pdev, channel);
92fec1c27caa7b drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 735 channel->dev = dev;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 736
549b6b55b00558 drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2019-04-11 737 provider = devm_of_phy_provider_register(dev, rcar_gen3_phy_usb2_xlate);
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 738 if (IS_ERR(provider)) {
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 739 dev_err(dev, "Failed to register PHY provider\n");
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 740 ret = PTR_ERR(provider);
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 741 goto error;
979b519c7a1bff drivers/phy/renesas/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2018-09-21 742 } else if (channel->is_otg_channel) {
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 743 int ret;
^^^^^^^
This "ret" declaration shadows the earlier ret declaration
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 744
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 745 ret = device_create_file(dev, &dev_attr_role);
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 746 if (ret < 0)
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 @747 goto error;
So it means we return success on this error path.
9bb86777fb71ee drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2016-11-09 748 }
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 749
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 750 return 0;
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 751
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 752 error:
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 753 pm_runtime_disable(dev);
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 754
441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 755 return ret;
f3b5a8d9b50d71 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2015-11-30 756 }
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki