Re: [PATCH 3/4] usb: cdns2: Add tracepoints for CDNS2 driver

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

Hi Pawel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on usb/usb-next usb/usb-linus westeri-thunderbolt/next soc/for-next linus/master v6.2-rc8 next-20230217]
[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/Pawel-Laszczak/usb-cdns2-Device-side-header-file-for-CDNS2-driver/20230216-195428
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link:    https://lore.kernel.org/r/20230216105411.364157-4-pawell%40cadence.com
patch subject: [PATCH 3/4] usb: cdns2: Add tracepoints for CDNS2 driver
config: ia64-allmodconfig (https://download.01.org/0day-ci/archive/20230219/202302190436.AU6zwie0-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/edb55f1c0a0ffe341211e08b1ebf162f48dd5b83
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Pawel-Laszczak/usb-cdns2-Device-side-header-file-for-CDNS2-driver/20230216-195428
        git checkout edb55f1c0a0ffe341211e08b1ebf162f48dd5b83
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/usb/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302190436.AU6zwie0-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/usb/gadget/udc/cdns2/cdns2-trace.h:29,
                    from drivers/usb/gadget/udc/cdns2/cdns2-gadget.c:36:
   drivers/usb/gadget/udc/cdns2/cdns2-debug.h: In function 'cdns2_decode_trb':
>> drivers/usb/gadget/udc/cdns2/cdns2-debug.h:165:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     165 |         int ret;
         |             ^~~
   drivers/usb/gadget/udc/cdns2/cdns2-gadget.c: In function 'cdns2_gadget_ep_enable':
   drivers/usb/gadget/udc/cdns2/cdns2-gadget.c:1408:49: warning: variable 'comp_desc' set but not used [-Wunused-but-set-variable]
    1408 |         const struct usb_ss_ep_comp_descriptor *comp_desc;
         |                                                 ^~~~~~~~~
--
   In file included from drivers/usb/gadget/udc/cdns2/cdns2-trace.h:29,
                    from drivers/usb/gadget/udc/cdns2/cdns2-ep0.c:13:
   drivers/usb/gadget/udc/cdns2/cdns2-debug.h: In function 'cdns2_decode_trb':
>> drivers/usb/gadget/udc/cdns2/cdns2-debug.h:165:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     165 |         int ret;
         |             ^~~
   drivers/usb/gadget/udc/cdns2/cdns2-ep0.c: In function 'cdns2_ep0_stall':
   drivers/usb/gadget/udc/cdns2/cdns2-ep0.c:93:12: warning: variable 'reg' set but not used [-Wunused-but-set-variable]
      93 |         u8 reg;
         |            ^~~


vim +/ret +165 drivers/usb/gadget/udc/cdns2/cdns2-debug.h

   160	
   161	static inline const char *cdns2_decode_trb(char *str, size_t size, u32 flags,
   162						   u32 length, u32 buffer)
   163	{
   164		int type = TRB_FIELD_TO_TYPE(flags);
 > 165		int ret;
   166	
   167		switch (type) {
   168		case TRB_LINK:
   169			ret = snprintf(str, size,
   170				       "LINK %08x type '%s' flags %c:%c:%c%c:%c",
   171				       buffer, cdns2_trb_type_string(type),
   172				       flags & TRB_CYCLE ? 'C' : 'c',
   173				       flags & TRB_TOGGLE ? 'T' : 't',
   174				       flags & TRB_CHAIN ? 'C' : 'c',
   175				       flags & TRB_CHAIN ? 'H' : 'h',
   176				       flags & TRB_IOC ? 'I' : 'i');
   177			break;
   178		case TRB_NORMAL:
   179			ret = snprintf(str, size,
   180				       "type: '%s', Buffer: %08x, length: %ld, burst len: %ld, "
   181				       "flags %c:%c:%c%c:%c",
   182				       cdns2_trb_type_string(type),
   183				       buffer, TRB_LEN(length),
   184				       TRB_FIELD_TO_BURST(length),
   185				       flags & TRB_CYCLE ? 'C' : 'c',
   186				       flags & TRB_ISP ? 'I' : 'i',
   187				       flags & TRB_CHAIN ? 'C' : 'c',
   188				       flags & TRB_CHAIN ? 'H' : 'h',
   189				       flags & TRB_IOC ? 'I' : 'i');
   190			break;
   191		default:
   192			ret = snprintf(str, size, "type '%s' -> raw %08x %08x %08x",
   193				       cdns2_trb_type_string(type),
   194				       buffer, length, flags);
   195		}
   196	
   197		return str;
   198	}
   199	

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