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X-CSE-ConnectionGUID: /b3TSbWqQQ2dvLICKMU6pA== X-CSE-MsgGUID: w1lqaay9RwyMQys73hcORw== X-IronPort-AV: E=McAfee;i="6800,10657,11515"; a="56750881" X-IronPort-AV: E=Sophos;i="6.17,274,1747724400"; d="scan'208";a="56750881" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Aug 2025 12:58:07 -0700 X-CSE-ConnectionGUID: nxAfNcsPTwSLKLoISiPpHw== X-CSE-MsgGUID: OefX2H0oReqbAhGTkJXdzQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,274,1747724400"; d="scan'208";a="164629461" Received: from lkp-server02.sh.intel.com (HELO 4ea60e6ab079) ([10.239.97.151]) by orviesa006.jf.intel.com with ESMTP; 08 Aug 2025 12:58:03 -0700 Received: from kbuild by 4ea60e6ab079 with local (Exim 4.96) (envelope-from ) id 1ukTE0-0004G2-2h; Fri, 08 Aug 2025 19:58:00 +0000 Date: Sat, 9 Aug 2025 03:57:06 +0800 From: kernel test robot To: hans.zhang@cixtech.com, bhelgaas@google.com, lpieralisi@kernel.org, kw@linux.com, mani@kernel.org, robh@kernel.org, kwilczynski@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, mpillai@cadence.com, fugang.duan@cixtech.com, guoyin.chen@cixtech.com, peter.chen@cixtech.com, cix-kernel-upstream@cixtech.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Hans Zhang Subject: Re: [PATCH v6 06/12] PCI: cadence: Add support for High Performance Arch(HPA) controller Message-ID: <202508090343.TWUqM8E7-lkp@intel.com> References: <20250808072929.4090694-7-hans.zhang@cixtech.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250808072929.4090694-7-hans.zhang@cixtech.com> Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on 37816488247ddddbc3de113c78c83572274b1e2e] url: https://github.com/intel-lab-lkp/linux/commits/hans-zhang-cixtech-com/PCI-cadence-Split-PCIe-controller-header-file/20250808-154018 base: 37816488247ddddbc3de113c78c83572274b1e2e patch link: https://lore.kernel.org/r/20250808072929.4090694-7-hans.zhang%40cixtech.com patch subject: [PATCH v6 06/12] PCI: cadence: Add support for High Performance Arch(HPA) controller config: arm64-randconfig-002-20250809 (https://download.01.org/0day-ci/archive/20250809/202508090343.TWUqM8E7-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 3769ce013be2879bf0b329c14a16f5cb766f26ce) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250809/202508090343.TWUqM8E7-lkp@intel.com/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 | Closes: https://lore.kernel.org/oe-kbuild-all/202508090343.TWUqM8E7-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/pci/controller/cadence/pcie-cadence-host-hpa.c:66:3: warning: variable 'desc0' is uninitialized when used here [-Wuninitialized] 66 | desc0 |= CDNS_PCIE_HPA_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0; | ^~~~~ drivers/pci/controller/cadence/pcie-cadence-host-hpa.c:28:18: note: initialize the variable 'desc0' to silence this warning 28 | u32 addr0, desc0, desc1, ctrl0; | ^ | = 0 1 warning generated. vim +/desc0 +66 drivers/pci/controller/cadence/pcie-cadence-host-hpa.c 20 21 void __iomem *cdns_pci_hpa_map_bus(struct pci_bus *bus, unsigned int devfn, 22 int where) 23 { 24 struct pci_host_bridge *bridge = pci_find_host_bridge(bus); 25 struct cdns_pcie_rc *rc = pci_host_bridge_priv(bridge); 26 struct cdns_pcie *pcie = &rc->pcie; 27 unsigned int busn = bus->number; 28 u32 addr0, desc0, desc1, ctrl0; 29 u32 regval; 30 31 if (pci_is_root_bus(bus)) { 32 /* 33 * Only the root port (devfn == 0) is connected to this bus. 34 * All other PCI devices are behind some bridge hence on another 35 * bus. 36 */ 37 if (devfn) 38 return NULL; 39 40 return pcie->reg_base + (where & 0xfff); 41 } 42 43 /* Clear AXI link-down status */ 44 regval = cdns_pcie_hpa_readl(pcie, REG_BANK_AXI_SLAVE, CDNS_PCIE_HPA_AT_LINKDOWN); 45 cdns_pcie_hpa_writel(pcie, REG_BANK_AXI_SLAVE, CDNS_PCIE_HPA_AT_LINKDOWN, 46 (regval & ~GENMASK(0, 0))); 47 48 desc1 = 0; 49 ctrl0 = 0; 50 51 /* Update Output registers for AXI region 0. */ 52 addr0 = CDNS_PCIE_HPA_AT_OB_REGION_PCI_ADDR0_NBITS(12) | 53 CDNS_PCIE_HPA_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) | 54 CDNS_PCIE_HPA_AT_OB_REGION_PCI_ADDR0_BUS(busn); 55 cdns_pcie_hpa_writel(pcie, REG_BANK_AXI_SLAVE, 56 CDNS_PCIE_HPA_AT_OB_REGION_PCI_ADDR0(0), addr0); 57 58 desc1 = cdns_pcie_hpa_readl(pcie, REG_BANK_AXI_SLAVE, 59 CDNS_PCIE_HPA_AT_OB_REGION_DESC1(0)); 60 desc1 &= ~CDNS_PCIE_HPA_AT_OB_REGION_DESC1_DEVFN_MASK; 61 desc1 |= CDNS_PCIE_HPA_AT_OB_REGION_DESC1_DEVFN(0); 62 ctrl0 = CDNS_PCIE_HPA_AT_OB_REGION_CTRL0_SUPPLY_BUS | 63 CDNS_PCIE_HPA_AT_OB_REGION_CTRL0_SUPPLY_DEV_FN; 64 65 if (busn == bridge->busnr + 1) > 66 desc0 |= CDNS_PCIE_HPA_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0; 67 else 68 desc0 |= CDNS_PCIE_HPA_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1; 69 70 cdns_pcie_hpa_writel(pcie, REG_BANK_AXI_SLAVE, 71 CDNS_PCIE_HPA_AT_OB_REGION_DESC0(0), desc0); 72 cdns_pcie_hpa_writel(pcie, REG_BANK_AXI_SLAVE, 73 CDNS_PCIE_HPA_AT_OB_REGION_DESC1(0), desc1); 74 cdns_pcie_hpa_writel(pcie, REG_BANK_AXI_SLAVE, 75 CDNS_PCIE_HPA_AT_OB_REGION_CTRL0(0), ctrl0); 76 77 return rc->cfg_base + (where & 0xfff); 78 } 79 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki