linux-kernel - Re: [PATCH 2/3] PCI: dwc: Add Qualcomm PCIe Endpoint controller driver

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Message-ID: <202106022242.E6YCFfN0-lkp@intel.com>
Date:   Wed, 2 Jun 2021 22:05:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        lorenzo.pieralisi@....com, robh@...nel.org, bhelgaas@...gle.com
Cc:     kbuild-all@...ts.01.org, bjorn.andersson@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Siddartha Mohanadoss <smohanad@...eaurora.org>
Subject: Re: [PATCH 2/3] PCI: dwc: Add Qualcomm PCIe Endpoint controller
 driver

Hi Manivannan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pci/next]
[also build test WARNING on robh/for-next linus/master v5.13-rc4 next-20210602]
[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]

url:    https://github.com/0day-ci/linux/commits/Manivannan-Sadhasivam/Add-Qualcomm-PCIe-Endpoint-driver-support/20210602-200949
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/c61e07facdc420a695654c60f2f32437c93427e5
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Manivannan-Sadhasivam/Add-Qualcomm-PCIe-Endpoint-driver-support/20210602-200949
        git checkout c61e07facdc420a695654c60f2f32437c93427e5
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/pci/controller/dwc/pcie-qcom-ep.c: In function 'qcom_pcie_ep_configure_tcsr':
>> drivers/pci/controller/dwc/pcie-qcom-ep.c:177:6: warning: variable 'reg' set but not used [-Wunused-but-set-variable]
     177 |  u32 reg;
         |      ^~~
   drivers/pci/controller/dwc/pcie-qcom-ep.c: In function 'qcom_pcie_establish_link':
   drivers/pci/controller/dwc/pcie-qcom-ep.c:357:21: warning: unused variable 'epf_bar' [-Wunused-variable]
     357 |  struct pci_epf_bar epf_bar;
         |                     ^~~~~~~
   drivers/pci/controller/dwc/pcie-qcom-ep.c:356:18: warning: unused variable 'epc' [-Wunused-variable]
     356 |  struct pci_epc *epc = pci->ep.epc;
         |                  ^~~


vim +/reg +177 drivers/pci/controller/dwc/pcie-qcom-ep.c

   169	
   170	/*
   171	 * Delatch PERST_EN and PERST_SEPARATION_ENABLE with TCSR to avoid
   172	 * device reset during host reboot and hibernation. The driver is
   173	 * expected to handle this situation.
   174	 */
   175	static void qcom_pcie_ep_configure_tcsr(struct qcom_pcie_ep *pcie_ep)
   176	{
 > 177		u32 reg;
   178	
   179		reg = readl(pcie_ep->tcsr + TCSR_PCIE_PERST_EN);
   180		writel_relaxed(0x0, pcie_ep->tcsr + TCSR_PCIE_PERST_EN);
   181	
   182		reg = readl(pcie_ep->tcsr + TCSR_PERST_SEPARATION_ENABLE);
   183		writel_relaxed(0x0, pcie_ep->tcsr + TCSR_PERST_SEPARATION_ENABLE);
   184	}
   185	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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