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Message-ID: <CAMuHMdVFBFDj0B+1E1Bj3ZOyftg=mi8uwQt2Z2bs2vZbgn5YRw@mail.gmail.com>
Date: Tue, 2 Jan 2024 15:52:01 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: oe-kbuild@...ts.linux.dev,
Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, lkp@...el.com,
oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Conor Dooley <conor.dooley@...rochip.com>, Guo Ren <guoren@...nel.org>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Subject: Re: drivers/phy/renesas/phy-rcar-gen3-usb2.c:747 rcar_gen3_phy_usb2_probe()
warn: missing error code 'ret'
CC Shimoda-san,
On Tue, Jan 2, 2024 at 3:03 PM Dan Carpenter <dan.carpenter@...aro.org> wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 3bd7d748816927202268cb335921f7f68b3ca723
> commit: 8292493c22c8e28b6e67a01e0f5c6db1cf231eb1 riscv: Kconfig.socs: Add ARCH_RENESAS kconfig option
Wrong commit
Fixes: 441a681b8843474c ("phy: rcar-gen3-usb2: fix implementation for
runtime PM")
> config: riscv-randconfig-r081-20231216 (https://download.01.org/0day-ci/archive/20231216/202312161021.gOLDl48K-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
>
> 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@...el.com>
> | Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> | Closes: https://lore.kernel.org/r/202312161021.gOLDl48K-lkp@intel.com/
>
> 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;
>
> I would delete this "ret" declaration.
Agreed.
>
> 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;
>
> Shadow 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)
>
> The "ret" here is the shadow ret so we end up returning success.
Oops...
>
> 441a681b884347 drivers/phy/phy-rcar-gen3-usb2.c Yoshihiro Shimoda 2017-03-14 @747 goto error;
> 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
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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