[usb:usb-testing 66/66] drivers/usb/gadget/function/u_audio.c:589:45: error: variable 'p_pktsize_residue' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
head:   d143d2c76ed6b02cca4a366cb1ed8549c5fc2a32
commit: d143d2c76ed6b02cca4a366cb1ed8549c5fc2a32 [66/66] usb: gadget: u_audio.c: Adding Playback Pitch ctl for sync playback
config: nios2-allyesconfig (attached as .config)
compiler: nios2-linux-gcc (GCC) 11.2.0
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/gregkh/usb.git/commit/?id=d143d2c76ed6b02cca4a366cb1ed8549c5fc2a32
        git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
        git fetch --no-tags usb usb-testing
        git checkout d143d2c76ed6b02cca4a366cb1ed8549c5fc2a32
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nios2 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   drivers/usb/gadget/function/u_audio.c: In function 'u_audio_start_playback':

quoted

drivers/usb/gadget/function/u_audio.c:589:45: error: variable 'p_pktsize_residue' set but not used [-Werror=unused-but-set-variable]

     589 |         unsigned int p_interval, p_pktsize, p_pktsize_residue;
         |                                             ^~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/p_pktsize_residue +589 drivers/usb/gadget/function/u_audio.c

   576	
   577	int u_audio_start_playback(struct g_audio *audio_dev)
   578	{
   579		struct snd_uac_chip *uac = audio_dev->uac;
   580		struct usb_gadget *gadget = audio_dev->gadget;
   581		struct device *dev = &gadget->dev;
   582		struct usb_request *req;
   583		struct usb_ep *ep;
   584		struct uac_rtd_params *prm;
   585		struct uac_params *params = &audio_dev->params;
   586		unsigned int factor;
   587		const struct usb_endpoint_descriptor *ep_desc;
   588		int req_len, i;
 > 589		unsigned int p_interval, p_pktsize, p_pktsize_residue;
   590	
   591		ep = audio_dev->in_ep;
   592		prm = &uac->p_prm;
   593		config_ep_by_speed(gadget, &audio_dev->func, ep);
   594	
   595		ep_desc = ep->desc;
   596		/*
   597		 * Always start with original frequency
   598		 */
   599		prm->pitch = 1000000;
   600	
   601		/* pre-calculate the playback endpoint's interval */
   602		if (gadget->speed == USB_SPEED_FULL)
   603			factor = 1000;
   604		else
   605			factor = 8000;
   606	
   607		/* pre-compute some values for iso_complete() */
   608		uac->p_framesize = params->p_ssize *
   609				    num_channels(params->p_chmask);
   610		p_interval = factor / (1 << (ep_desc->bInterval - 1));
   611		uac->p_interval_mil = (unsigned long long) p_interval * 1000000;
   612		p_pktsize = min_t(unsigned int,
   613					uac->p_framesize *
   614						(params->p_srate / p_interval),
   615					ep->maxpacket);
   616	
   617		if (p_pktsize < ep->maxpacket)
   618			p_pktsize_residue = uac->p_framesize *
   619				(params->p_srate % p_interval);
   620		else
   621			p_pktsize_residue = 0;
   622	
   623		req_len = p_pktsize;
   624		uac->p_residue_mil = 0;
   625	
   626		prm->ep_enabled = true;
   627		usb_ep_enable(ep);
   628	
   629		for (i = 0; i < params->req_number; i++) {
   630			if (!prm->reqs[i]) {
   631				req = usb_ep_alloc_request(ep, GFP_ATOMIC);
   632				if (req == NULL)
   633					return -ENOMEM;
   634	
   635				prm->reqs[i] = req;
   636	
   637				req->zero = 0;
   638				req->context = prm;
   639				req->length = req_len;
   640				req->complete = u_audio_iso_complete;
   641				req->buf = prm->rbuf + i * ep->maxpacket;
   642			}
   643	
   644			if (usb_ep_queue(ep, prm->reqs[i], GFP_ATOMIC))
   645				dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
   646		}
   647	
   648		return 0;
   649	}
   650	EXPORT_SYMBOL_GPL(u_audio_start_playback);
   651	

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