nvme fixes for Linux 6.5

- Reduce spamming kernel logs on repeated controller updates (Breno)
  - Improved struct packing (Christophe JAILLET)
  - Misspelled command name in error logging (Damien)
  - Failover fix for temporary frozen queue (Sagi)
  - Reset error handling fixes (Keith)
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Merge tag 'nvme-6.5-2023-06-30' of git://git.infradead.org/nvme into block-6.5

Pull NVMe fixes from Keith:

"nvme fixes for Linux 6.5

 - Reduce spamming kernel logs on repeated controller updates (Breno)
 - Improved struct packing (Christophe JAILLET)
 - Misspelled command name in error logging (Damien)
 - Failover fix for temporary frozen queue (Sagi)
 - Reset error handling fixes (Keith)"

* tag 'nvme-6.5-2023-06-30' of git://git.infradead.org/nvme:
  nvme: disable controller on reset state failure
  nvme: sync timeout work on failed reset
  nvme: ensure unquiesce on teardown
  nvme-mpath: fix I/O failure with EAGAIN when failing over I/O
  nvme: host: fix command name spelling
  nvmet: Reorder fields in 'struct nvmet_ns'
  nvme: Print capabilities changes just once

drivers/nvme/host/constants.c

@@ -12,7 +12,7 @@ static const char * const nvme_ops[] = {
 	[nvme_cmd_read] = "Read",
 	[nvme_cmd_write_uncor] = "Write Uncorrectable",
 	[nvme_cmd_compare] = "Compare",
-	[nvme_cmd_write_zeroes] = "Write Zeros",
+	[nvme_cmd_write_zeroes] = "Write Zeroes",
 	[nvme_cmd_dsm] = "Dataset Management",
 	[nvme_cmd_verify] = "Verify",
 	[nvme_cmd_resv_register] = "Reservation Register",

drivers/nvme/host/core.c

@@ -1134,8 +1134,11 @@ void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
 		mutex_unlock(&ctrl->scan_lock);
 	}
 	if (effects & NVME_CMD_EFFECTS_CCC) {
-		dev_info(ctrl->device,
+		if (!test_and_set_bit(NVME_CTRL_DIRTY_CAPABILITY,
+				      &ctrl->flags)) {
+			dev_info(ctrl->device,
 "controller capabilities changed, reset may be required to take effect.\n");
+		}
 	}
 	if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC)) {
 		nvme_queue_scan(ctrl);
@@ -3324,6 +3327,7 @@ int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended)
 			return ret;
 	}
 
+	clear_bit(NVME_CTRL_DIRTY_CAPABILITY, &ctrl->flags);
 	ctrl->identified = true;
 
 	return 0;

drivers/nvme/host/multipath.c

@@ -106,6 +106,14 @@ void nvme_failover_req(struct request *req)
 			bio->bi_opf &= ~REQ_POLLED;
 			bio->bi_cookie = BLK_QC_T_NONE;
 		}
+		/*
+		 * The alternate request queue that we may end up submitting
+		 * the bio to may be frozen temporarily, in this case REQ_NOWAIT
+		 * will fail the I/O immediately with EAGAIN to the issuer.
+		 * We are not in the issuer context which cannot block. Clear
+		 * the flag to avoid spurious EAGAIN I/O failures.
+		 */
+		bio->bi_opf &= ~REQ_NOWAIT;
 	}
 	blk_steal_bios(&ns->head->requeue_list, req);
 	spin_unlock_irqrestore(&ns->head->requeue_lock, flags);

drivers/nvme/host/nvme.h

@@ -248,6 +248,7 @@ enum nvme_ctrl_flags {
 	NVME_CTRL_STARTED_ONCE		= 2,
 	NVME_CTRL_STOPPED		= 3,
 	NVME_CTRL_SKIP_ID_CNS_CS	= 4,
+	NVME_CTRL_DIRTY_CAPABILITY	= 5,
 };
 
 struct nvme_ctrl {

drivers/nvme/host/pci.c

@@ -2690,7 +2690,8 @@ static void nvme_reset_work(struct work_struct *work)
 	if (dev->ctrl.state != NVME_CTRL_RESETTING) {
 		dev_warn(dev->ctrl.device, "ctrl state %d is not RESETTING\n",
 			 dev->ctrl.state);
-		return;
+		result = -ENODEV;
+		goto out;
 	}
 
 	/*
@@ -2777,7 +2778,9 @@ static void nvme_reset_work(struct work_struct *work)
 		 result);
 	nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING);
 	nvme_dev_disable(dev, true);
+	nvme_sync_queues(&dev->ctrl);
 	nvme_mark_namespaces_dead(&dev->ctrl);
+	nvme_unquiesce_io_queues(&dev->ctrl);
 	nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DEAD);
 }
 

drivers/nvme/target/nvmet.h

@@ -79,8 +79,8 @@ struct nvmet_ns {
 	struct completion	disable_done;
 	mempool_t		*bvec_pool;
 
-	int			use_p2pmem;
 	struct pci_dev		*p2p_dev;
+	int			use_p2pmem;
 	int			pi_type;
 	int			metadata_size;
 	u8			csi;