Re: [PATCH v2 3/3] PCI: tegra194: Notify Endpoint functions on PERST# assert
From: kernel test robot
Date: Thu Oct 22 2026 - 21:39:50 EST
Hi Manikanta,
kernel test robot noticed the following build errors:
[auto build test ERROR on pci/next]
[also build test ERROR on pci/for-linus linus/master v7.3 next-20261022]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Manikanta-Maddireddy/PCI-dwc-Reuse-Endpoint-resources-after-fundamental-reset/20261021-114901
base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next
patch link: https://lore.kernel.org/r/20261021061903.1269605-4-mmaddireddy%40nvidia.com
patch subject: [PATCH v2 3/3] PCI: tegra194: Notify Endpoint functions on PERST# assert
config: xtensa-randconfig-1001-20261022 (https://download.01.org/0day-ci/archive/20261023/202610230923.2lf3BsLs-lkp@xxxxxxxxx/config)
compiler: xtensa-linux-gcc (GCC) 15.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261023/202610230923.2lf3BsLs-lkp@xxxxxxxxx/reproduce)
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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610230923.2lf3BsLs-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
drivers/pci/controller/dwc/pcie-tegra194.c: In function 'pex_ep_event_pex_rst_assert':
>> drivers/pci/controller/dwc/pcie-tegra194.c:1708:9: error: implicit declaration of function 'pci_epc_linkdown'; did you mean 'dw_pcie_ep_linkdown'? [-Wimplicit-function-declaration]
1708 | pci_epc_linkdown(pcie->pci.ep.epc);
| ^~~~~~~~~~~~~~~~
| dw_pcie_ep_linkdown
vim +1708 drivers/pci/controller/dwc/pcie-tegra194.c
1688
1689 static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie)
1690 {
1691 u32 val;
1692 int ret;
1693
1694 if (pcie->ep_state == EP_STATE_DISABLED)
1695 return;
1696
1697 ret = readl_poll_timeout(pcie->appl_base + APPL_DEBUG, val,
1698 ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_DETECT_QUIET) ||
1699 ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_DETECT_ACT) ||
1700 ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_PRE_DETECT_QUIET) ||
1701 ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_DETECT_WAIT) ||
1702 ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_L2_IDLE),
1703 LTSSM_DELAY_US, LTSSM_TIMEOUT_US);
1704 if (ret)
1705 dev_info(pcie->dev, "LTSSM state: 0x%x detect timeout: %d\n", val, ret);
1706
1707 /* Avoid the DBI register reinitialization in dw_pcie_ep_linkdown(). */
> 1708 pci_epc_linkdown(pcie->pci.ep.epc);
1709
1710 /*
1711 * Deassert LTSSM state to stop the state toggling between
1712 * Polling and Detect.
1713 */
1714 val = appl_readl(pcie, APPL_CTRL);
1715 val &= ~APPL_CTRL_LTSSM_EN;
1716 appl_writel(pcie, val, APPL_CTRL);
1717
1718 reset_control_assert(pcie->core_rst);
1719
1720 tegra_pcie_disable_phy(pcie);
1721
1722 reset_control_assert(pcie->core_apb_rst);
1723
1724 clk_disable_unprepare(pcie->core_clk);
1725
1726 pm_runtime_put_sync(pcie->dev);
1727
1728 if (pcie->enable_ext_refclk) {
1729 ret = tegra_pcie_bpmp_set_pll_state(pcie, false);
1730 if (ret)
1731 dev_err(pcie->dev, "Failed to turn off UPHY: %d\n",
1732 ret);
1733 }
1734
1735 ret = tegra_pcie_bpmp_set_ctrl_state(pcie, false);
1736 if (ret)
1737 dev_err(pcie->dev, "Failed to disable controller: %d\n", ret);
1738
1739 pcie->ep_state = EP_STATE_DISABLED;
1740 dev_dbg(pcie->dev, "Uninitialization of endpoint is completed\n");
1741 }
1742
--
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