[xhci:fuzzing_cleanup 7/8] drivers/usb/host/xhci-ring.c:468:19: warning: no previous prototype for 'xhci_virt_ep_to_ring'

[xhci:fuzzing_cleanup 7/8] drivers/usb/host/xhci-ring.c:468:19: warning: no previous prototype for 'xhci_virt_ep_to_ring'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git fuzzing_cleanup
head:   c4ec33c20414ce14307795bfab4eb3b83de76746
commit: 3cd55408d74d9c3a8547a52d2332f238cf8a2692 [7/8] xhci: add xhci_virt_ep_to_ring() helper
config: alpha-randconfig-r021-20201217 (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://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/commit/?id=3cd55408d74d9c3a8547a52d2332f238cf8a2692
        git remote add xhci https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git
        git fetch --no-tags xhci fuzzing_cleanup
        git checkout 3cd55408d74d9c3a8547a52d2332f238cf8a2692
        # 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@intel.com>

All warnings (new ones prefixed by >>):

   drivers/usb/host/xhci-ring.c:449:22: warning: no previous prototype for 'xhci_get_virt_ep' [-Wmissing-prototypes]
     449 | struct xhci_virt_ep *xhci_get_virt_ep(struct xhci_hcd *xhci, unsigned int slot_id,
         |                      ^~~~~~~~~~~~~~~~
>> drivers/usb/host/xhci-ring.c:468:19: warning: no previous prototype for 'xhci_virt_ep_to_ring' [-Wmissing-prototypes]
     468 | struct xhci_ring *xhci_virt_ep_to_ring(struct xhci_hcd *xhci,
         |                   ^~~~~~~~~~~~~~~~~~~~


vim +/xhci_virt_ep_to_ring +468 drivers/usb/host/xhci-ring.c

   467	
 > 468	struct xhci_ring *xhci_virt_ep_to_ring(struct xhci_hcd *xhci,
   469					       struct xhci_virt_ep *ep,
   470					       unsigned int stream_id)
   471	{
   472		/* common case, no streams */
   473		if (!(ep->ep_state & EP_HAS_STREAMS))
   474			return ep->ring;
   475	
   476		if (!ep->stream_info)
   477			return NULL;
   478	
   479		if (stream_id == 0 || stream_id >= ep->stream_info->num_streams) {
   480			xhci_warn(xhci, "Invalid stream %u request for slot %u ep %u\n",
   481				  ep->vdev->slot_id, ep->ep_index, stream_id);
   482			return NULL;
   483		}
   484	
   485		return ep->stream_info->stream_rings[stream_id];
   486	}
   487	

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

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