[ti:ti-rt-linux-5.4.y 3430/12234] drivers/usb/cdns3/cdns3-ti.c:55:24: sparse: sparse: dubious one-bit signed bitfield

[ti:ti-rt-linux-5.4.y 3430/12234] drivers/usb/cdns3/cdns3-ti.c:55:24: sparse: sparse: dubious one-bit signed bitfield

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: Roger Quadros <rogerq@ti.com>
CC: Sekhar Nori <nsekhar@ti.com>
CC: Pawel Laszczak <pawell@cadence.com>
CC: Felipe Balbi <felipe.balbi@linux.intel.com>

tree:   git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.4.y
head:   b956d57638aa031e0b660684c0152dd698ecf150
commit: 58c2bef2e443bc8b05737b47ec2ed992529976c7 [3430/12234] usb: cdns3: Add TI specific wrapper driver
:::::: branch date: 5 hours ago
:::::: commit date: 10 months ago
config: xtensa-randconfig-s032-20201115 (attached as .config)
compiler: xtensa-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-107-gaf3512a6-dirty
        git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git
        git fetch --no-tags ti ti-rt-linux-5.4.y
        git checkout 58c2bef2e443bc8b05737b47ec2ed992529976c7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=xtensa 

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


"sparse warnings: (new ones prefixed by >>)"
>> drivers/usb/cdns3/cdns3-ti.c:55:24: sparse: sparse: dubious one-bit signed bitfield
   drivers/usb/cdns3/cdns3-ti.c:56:27: sparse: sparse: dubious one-bit signed bitfield

vim +55 drivers/usb/cdns3/cdns3-ti.c

58c2bef2e443bc8 Roger Quadros 2020-02-03  46  
58c2bef2e443bc8 Roger Quadros 2020-02-03  47  /* Modestrap modes */
58c2bef2e443bc8 Roger Quadros 2020-02-03  48  enum modestrap_mode { USBSS_MODESTRAP_MODE_NONE,
58c2bef2e443bc8 Roger Quadros 2020-02-03  49  		      USBSS_MODESTRAP_MODE_HOST,
58c2bef2e443bc8 Roger Quadros 2020-02-03  50  		      USBSS_MODESTRAP_MODE_PERIPHERAL};
58c2bef2e443bc8 Roger Quadros 2020-02-03  51  
58c2bef2e443bc8 Roger Quadros 2020-02-03  52  struct cdns_ti {
58c2bef2e443bc8 Roger Quadros 2020-02-03  53  	struct device *dev;
58c2bef2e443bc8 Roger Quadros 2020-02-03  54  	void __iomem *usbss;
58c2bef2e443bc8 Roger Quadros 2020-02-03 @55  	int usb2_only:1;
58c2bef2e443bc8 Roger Quadros 2020-02-03  56  	int vbus_divider:1;
58c2bef2e443bc8 Roger Quadros 2020-02-03  57  	struct clk *usb2_refclk;
58c2bef2e443bc8 Roger Quadros 2020-02-03  58  	struct clk *lpm_clk;
58c2bef2e443bc8 Roger Quadros 2020-02-03  59  };
58c2bef2e443bc8 Roger Quadros 2020-02-03  60  

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

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