[axboe-block:for-5.17/drivers 77/78] drivers/block/null_blk/main.c:1577:55: sparse: sparse: incorrect type in argument 3 (different base types)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.17/drivers
head:   db67097aa6f2587b44055f2e16db72a11e17faef
commit: 2385ebf38f94d4f7761b1e9a4973d04753da02c2 [77/78] block: null_blk: batched complete poll requests
config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20211211/202112110756.lMQBZRW5-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?id=2385ebf38f94d4f7761b1e9a4973d04753da02c2
        git remote add axboe-block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
        git fetch --no-tags axboe-block for-5.17/drivers
        git checkout 2385ebf38f94d4f7761b1e9a4973d04753da02c2
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash

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


sparse warnings: (new ones prefixed by >>)
>> drivers/block/null_blk/main.c:1577:55: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected int ioerror @@     got restricted blk_status_t [usertype] error @@
   drivers/block/null_blk/main.c:1577:55: sparse:     expected int ioerror
   drivers/block/null_blk/main.c:1577:55: sparse:     got restricted blk_status_t [usertype] error

vim +1577 drivers/block/null_blk/main.c

  1557	
  1558	static int null_poll(struct blk_mq_hw_ctx *hctx, struct io_comp_batch *iob)
  1559	{
  1560		struct nullb_queue *nq = hctx->driver_data;
  1561		LIST_HEAD(list);
  1562		int nr = 0;
  1563	
  1564		spin_lock(&nq->poll_lock);
  1565		list_splice_init(&nq->poll_list, &list);
  1566		spin_unlock(&nq->poll_lock);
  1567	
  1568		while (!list_empty(&list)) {
  1569			struct nullb_cmd *cmd;
  1570			struct request *req;
  1571	
  1572			req = list_first_entry(&list, struct request, queuelist);
  1573			list_del_init(&req->queuelist);
  1574			cmd = blk_mq_rq_to_pdu(req);
  1575			cmd->error = null_process_cmd(cmd, req_op(req), blk_rq_pos(req),
  1576							blk_rq_sectors(req));
> 1577			if (!blk_mq_add_to_batch(req, iob, cmd->error,
  1578						blk_mq_end_request_batch))
  1579				end_cmd(cmd);
  1580			nr++;
  1581		}
  1582	
  1583		return nr;
  1584	}
  1585	

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