Re: [PATCH v19 3/4] PCI: microchip: Add host driver for Microchip PCIe controller

[kernel test robot <lkp@intel.com>]

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Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 3650b228f83adda7e5ee532e2b90429c03f7b9ec]

url:    https://github.com/0day-ci/linux/commits/daire-mcnamara-microchip-com/PCI-microchip-Add-host-driver-for-Microchip-PCIe-controller/20201224-174858
base:    3650b228f83adda7e5ee532e2b90429c03f7b9ec
config: mips-allyesconfig (attached as .config)
compiler: mips-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/05ba26bb79a9904585ed68019beec93a5258b0f3
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review daire-mcnamara-microchip-com/PCI-microchip-Add-host-driver-for-Microchip-PCIe-controller/20201224-174858
        git checkout 05ba26bb79a9904585ed68019beec93a5258b0f3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

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

All warnings (new ones prefixed by >>):

   drivers/pci/controller/pcie-microchip-host.c: In function 'mc_msi_bottom_irq_ack':
>> drivers/pci/controller/pcie-microchip-host.c:436:17: warning: variable 'msi' set but not used [-Wunused-but-set-variable]
     436 |  struct mc_msi *msi;
         |                 ^~~


vim +/msi +436 drivers/pci/controller/pcie-microchip-host.c

   431	
   432	static void mc_msi_bottom_irq_ack(struct irq_data *data)
   433	{
   434		struct mc_port *port = irq_data_get_irq_chip_data(data);
   435		void __iomem *bridge_base_addr;
 > 436		struct mc_msi *msi;
   437		u32 bitpos = data->hwirq;
   438		unsigned long status;
   439	
   440		bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
   441		msi = &port->msi;
   442	
   443		writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
   444		status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
   445		if (!status)
   446			writel_relaxed(BIT(PM_MSI_INT_MSI_SHIFT), bridge_base_addr + ISTATUS_LOCAL);
   447	}
   448	

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

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