[PATCH 1/3] nvme: failover requests for inactive hctx

[kernel test robot]

Hi Daniel,

kernel test robot noticed the following build errors:

[auto build test ERROR on 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Wagner/nvme-failover-requests-for-inactive-hctx/20260226-224213
base:   6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
patch link:    https://lore.kernel.org/r/20260226-revert-cpu-read-lock-v1-1-eb005072566e%40kernel.org
patch subject: [PATCH 1/3] nvme: failover requests for inactive hctx
config: x86_64-randconfig-r071-20260227 (https://download.01.org/0day-ci/archive/20260227/202602270720.cugNS3m1-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
smatch version: v0.5.0-8994-gd50c5a4c
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260227/202602270720.cugNS3m1-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602270720.cugNS3m1-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/nvme/host/core.c:457:13: error: redefinition of 'nvme_failover_req'
     457 | static void nvme_failover_req(struct request *req)
         |             ^~~~~~~~~~~~~~~~~
   In file included from drivers/nvme/host/core.c:27:
   drivers/nvme/host/nvme.h:1020:20: note: previous definition of 'nvme_failover_req' with type 'void(struct request *)'
    1020 | static inline void nvme_failover_req(struct request *req)
         |                    ^~~~~~~~~~~~~~~~~
   drivers/nvme/host/core.c: In function 'nvme_failover_req':
>> drivers/nvme/host/core.c:472:50: error: 'struct nvme_ctrl' has no member named 'ana_log_buf'
     472 |         if (nvme_is_ana_error(status) && ns->ctrl->ana_log_buf) {
         |                                                  ^~
>> drivers/nvme/host/core.c:474:48: error: 'struct nvme_ctrl' has no member named 'ana_work'; did you mean 'ka_work'?
     474 |                 queue_work(nvme_wq, &ns->ctrl->ana_work);
         |                                                ^~~~~~~~
         |                                                ka_work
   In file included from include/linux/sched.h:37,
                    from include/linux/ratelimit.h:6,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from include/linux/async.h:14,
                    from drivers/nvme/host/core.c:7:
>> drivers/nvme/host/core.c:477:36: error: 'struct nvme_ns_head' has no member named 'requeue_lock'
     477 |         spin_lock_irqsave(&ns->head->requeue_lock, flags);
         |                                    ^~
   include/linux/spinlock.h:244:48: note: in definition of macro 'raw_spin_lock_irqsave'
     244 |                 flags = _raw_spin_lock_irqsave(lock);   \
         |                                                ^~~~
   drivers/nvme/host/core.c:477:9: note: in expansion of macro 'spin_lock_irqsave'
     477 |         spin_lock_irqsave(&ns->head->requeue_lock, flags);
         |         ^~~~~~~~~~~~~~~~~
>> drivers/nvme/host/core.c:494:33: error: 'struct nvme_ns_head' has no member named 'requeue_list'
     494 |         blk_steal_bios(&ns->head->requeue_list, req);
         |                                 ^~
   drivers/nvme/host/core.c:495:41: error: 'struct nvme_ns_head' has no member named 'requeue_lock'
     495 |         spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
         |                                         ^~
>> drivers/nvme/host/core.c:499:40: error: 'struct nvme_ns_head' has no member named 'requeue_work'
     499 |         kblockd_schedule_work(&ns->head->requeue_work);
         |                                        ^~


vim +/nvme_failover_req +457 drivers/nvme/host/core.c

   456	
 > 457	static void nvme_failover_req(struct request *req)
   458	{
   459		struct nvme_ns *ns = req->q->queuedata;
   460		u16 status = nvme_req(req)->status & NVME_SCT_SC_MASK;
   461		unsigned long flags;
   462		struct bio *bio;
   463	
   464		if (nvme_ns_head_multipath(ns->head))
   465			nvme_mpath_clear_current_path(ns);
   466	
   467		/*
   468		 * If we got back an ANA error, we know the controller is alive but not
   469		 * ready to serve this namespace.  Kick of a re-read of the ANA
   470		 * information page, and just try any other available path for now.
   471		 */
 > 472		if (nvme_is_ana_error(status) && ns->ctrl->ana_log_buf) {
   473			set_bit(NVME_NS_ANA_PENDING, &ns->flags);
 > 474			queue_work(nvme_wq, &ns->ctrl->ana_work);
   475		}
   476	
 > 477		spin_lock_irqsave(&ns->head->requeue_lock, flags);
   478		for (bio = req->bio; bio; bio = bio->bi_next) {
   479			if (nvme_ns_head_multipath(ns->head))
   480				bio_set_dev(bio, ns->head->disk->part0);
   481			if (bio->bi_opf & REQ_POLLED) {
   482				bio->bi_opf &= ~REQ_POLLED;
   483				bio->bi_cookie = BLK_QC_T_NONE;
   484			}
   485			/*
   486			 * The alternate request queue that we may end up submitting
   487			 * the bio to may be frozen temporarily, in this case REQ_NOWAIT
   488			 * will fail the I/O immediately with EAGAIN to the issuer.
   489			 * We are not in the issuer context which cannot block. Clear
   490			 * the flag to avoid spurious EAGAIN I/O failures.
   491			 */
   492			bio->bi_opf &= ~REQ_NOWAIT;
   493		}
 > 494		blk_steal_bios(&ns->head->requeue_list, req);
   495		spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
   496	
   497		nvme_req(req)->status = 0;
   498		nvme_end_req(req);
 > 499		kblockd_schedule_work(&ns->head->requeue_work);
   500	}
   501	

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