Re: [PATCH v17 08/12] nvmet: add copy command support for bdev and file ns

[kernel test robot]

Hi Nitesh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 213f891525c222e8ed145ce1ce7ae1f47921cb9c]

url:    https://github.com/intel-lab-lkp/linux/commits/Nitesh-Shetty/block-Introduce-queue-limits-and-sysfs-for-copy-offload-support/20231019-200658
base:   213f891525c222e8ed145ce1ce7ae1f47921cb9c
patch link:    https://lore.kernel.org/r/20231019110147.31672-9-nj.shetty%40samsung.com
patch subject: [PATCH v17 08/12] nvmet: add copy command support for bdev and file ns
config: i386-randconfig-062-20231022 (https://download.01.org/0day-ci/archive/20231022/202310221915.PYH9XadG-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231022/202310221915.PYH9XadG-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310221915.PYH9XadG-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/nvme/target/io-cmd-bdev.c:498:30: sparse: sparse: restricted __le16 degrades to integer

vim +498 drivers/nvme/target/io-cmd-bdev.c

   478	
   479	/*
   480	 * At present we handle only one range entry, since copy offload is aligned with
   481	 * copy_file_range, only one entry is passed from block layer.
   482	 */
   483	static void nvmet_bdev_execute_copy(struct nvmet_req *rq)
   484	{
   485		struct nvme_copy_range range;
   486		struct nvme_command *cmd = rq->cmd;
   487		ssize_t ret;
   488		off_t dst, src;
   489	
   490		u16 status;
   491	
   492		status = nvmet_copy_from_sgl(rq, 0, &range, sizeof(range));
   493		if (status)
   494			goto err_rq_complete;
   495	
   496		dst = le64_to_cpu(cmd->copy.sdlba) << rq->ns->blksize_shift;
   497		src = le64_to_cpu(range.slba) << rq->ns->blksize_shift;
 > 498		rq->copy_len = (range.nlb + 1) << rq->ns->blksize_shift;
   499	
   500		if (bdev_max_copy_sectors(rq->ns->bdev)) {
   501			ret = blkdev_copy_offload(rq->ns->bdev, dst, src, rq->copy_len,
   502						  nvmet_bdev_copy_endio,
   503						  (void *)rq, GFP_KERNEL);
   504		} else {
   505			ret = blkdev_copy_emulation(rq->ns->bdev, dst,
   506						    rq->ns->bdev, src, rq->copy_len,
   507						    nvmet_bdev_copy_endio,
   508						    (void *)rq, GFP_KERNEL);
   509		}
   510		if (ret == -EIOCBQUEUED)
   511			return;
   512	
   513		rq->cqe->result.u32 = cpu_to_le32(0);
   514		status = errno_to_nvme_status(rq, ret);
   515	err_rq_complete:
   516		nvmet_req_complete(rq, status);
   517	}
   518	

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