[usb:usb-testing 49/52] sound/usb/qcom/qc_audio_offload.c:399:14: warning: variable 'found' set but not used

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
head:   c26f6731b8da887f1fb92d4654da57a19a266466
commit: 2974d256f0b76fda676b8c7f7ddee2752bbcac7b [49/52] ALSA: usb-audio: qcom: Introduce QC USB SND offloading support
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20250215/202502150035.0SvyRRJn-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250215/202502150035.0SvyRRJn-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502150035.0SvyRRJn-lkp@intel.com/

All warnings (new ones prefixed by >>):

   sound/usb/qcom/qc_audio_offload.c: In function 'uaudio_get_iova':
>> sound/usb/qcom/qc_audio_offload.c:399:14: warning: variable 'found' set but not used [-Wunused-but-set-variable]
     399 |         bool found = false;
         |              ^~~~~
   sound/usb/qcom/qc_audio_offload.c: In function 'prepare_qmi_response':
>> sound/usb/qcom/qc_audio_offload.c:1353:13: warning: variable 'xfer_buf_len' set but not used [-Wunused-but-set-variable]
    1353 |         u32 xfer_buf_len;
         |             ^~~~~~~~~~~~


vim +/found +399 sound/usb/qcom/qc_audio_offload.c

   389	
   390	/* Offloading IOMMU management */
   391	static unsigned long uaudio_get_iova(unsigned long *curr_iova,
   392					     size_t *curr_iova_size,
   393					     struct list_head *head, size_t size)
   394	{
   395		struct iova_info *info, *new_info = NULL;
   396		struct list_head *curr_head;
   397		size_t tmp_size = size;
   398		unsigned long va = 0;
 > 399		bool found = false;
   400	
   401		if (size % PAGE_SIZE)
   402			goto done;
   403	
   404		if (size > *curr_iova_size)
   405			goto done;
   406	
   407		if (*curr_iova_size == 0)
   408			goto done;
   409	
   410		list_for_each_entry(info, head, list) {
   411			/* exact size iova_info */
   412			if (!info->in_use && info->size == size) {
   413				info->in_use = true;
   414				va = info->start_iova;
   415				*curr_iova_size -= size;
   416				found = true;
   417				goto done;
   418			} else if (!info->in_use && tmp_size >= info->size) {
   419				if (!new_info)
   420					new_info = info;
   421				tmp_size -= info->size;
   422				if (tmp_size)
   423					continue;
   424	
   425				va = new_info->start_iova;
   426				for (curr_head = &new_info->list; curr_head !=
   427				&info->list; curr_head = curr_head->next) {
   428					new_info = list_entry(curr_head, struct
   429							iova_info, list);
   430					new_info->in_use = true;
   431				}
   432				info->in_use = true;
   433				*curr_iova_size -= size;
   434				found = true;
   435				goto done;
   436			} else {
   437				/* iova region in use */
   438				new_info = NULL;
   439				tmp_size = size;
   440			}
   441		}
   442	
   443		info = kzalloc(sizeof(*info), GFP_KERNEL);
   444		if (!info) {
   445			va = 0;
   446			goto done;
   447		}
   448	
   449		va = *curr_iova;
   450		info->start_iova = *curr_iova;
   451		info->size = size;
   452		info->in_use = true;
   453		*curr_iova += size;
   454		*curr_iova_size -= size;
   455		found = true;
   456		list_add_tail(&info->list, head);
   457	
   458	done:
   459		return va;
   460	}
   461	

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