Merge branch 'nvme-4.18' of git://git.infradead.org/nvme into for-4.18/block

Pull NVMe changes from Keith:

"This is just the first nvme pull request for 4.18. There are several
fabrics and target patches that I missed, so there will be more to
come."

* 'nvme-4.18' of git://git.infradead.org/nvme:
  nvme-pci: drop IRQ disabling on submission queue lock
  nvme-pci: split the nvme queue lock into submission and completion locks
  nvme-pci: handle completions outside of the queue lock
  nvme-pci: move ->cq_vector == -1 check outside of ->q_lock
  nvme-pci: remove cq check after submission
  nvme-pci: simplify nvme_cqe_valid
  nvme: mark the result argument to nvme_complete_async_event volatile
  nvme/pci: Sync controller reset for AER slot_reset
  nvme/pci: Hold controller reference during async probe
  nvme: only reconfigure discard if necessary
  nvme/pci: Use async_schedule for initial reset work
  nvme: lightnvm: add granby support
  NVMe: Add Quirk Delay before CHK RDY for Seagate Nytro Flash Storage
  nvme: change order of qid and cmdid in completion trace
  nvme: fc: provide a descriptive error

1 files changed, 17 insertions, 13 deletions

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index a3771c5729f5..5e1d6d69b307 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1348,13 +1348,19 @@ static void nvme_set_chunk_size(struct nvme_ns *ns)
 	blk_queue_chunk_sectors(ns->queue, rounddown_pow_of_two(chunk_size));
 }
 
-static void nvme_config_discard(struct nvme_ctrl *ctrl,
-		unsigned stream_alignment, struct request_queue *queue)
+static void nvme_config_discard(struct nvme_ns *ns)
 {
+	struct nvme_ctrl *ctrl = ns->ctrl;
+	struct request_queue *queue = ns->queue;
 	u32 size = queue_logical_block_size(queue);
 
-	if (stream_alignment)
-		size *= stream_alignment;
+	if (!(ctrl->oncs & NVME_CTRL_ONCS_DSM)) {
+		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, queue);
+		return;
+	}
+
+	if (ctrl->nr_streams && ns->sws && ns->sgs)
+		size *= ns->sws * ns->sgs;
 
 	BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) <
 			NVME_DSM_MAX_RANGES);
@@ -1362,9 +1368,12 @@ static void nvme_config_discard(struct nvme_ctrl *ctrl,
 	queue->limits.discard_alignment = 0;
 	queue->limits.discard_granularity = size;
 
+	/* If discard is already enabled, don't reset queue limits */
+	if (blk_queue_flag_test_and_set(QUEUE_FLAG_DISCARD, queue))
+		return;
+
 	blk_queue_max_discard_sectors(queue, UINT_MAX);
 	blk_queue_max_discard_segments(queue, NVME_DSM_MAX_RANGES);
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, queue);
 
 	if (ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES)
 		blk_queue_max_write_zeroes_sectors(queue, UINT_MAX);
@@ -1408,10 +1417,6 @@ static void nvme_update_disk_info(struct gendisk *disk,
 {
 	sector_t capacity = le64_to_cpup(&id->nsze) << (ns->lba_shift - 9);
 	unsigned short bs = 1 << ns->lba_shift;
-	unsigned stream_alignment = 0;
-
-	if (ns->ctrl->nr_streams && ns->sws && ns->sgs)
-		stream_alignment = ns->sws * ns->sgs;
 
 	blk_mq_freeze_queue(disk->queue);
 	blk_integrity_unregister(disk);
@@ -1425,10 +1430,9 @@ static void nvme_update_disk_info(struct gendisk *disk,
 		nvme_init_integrity(disk, ns->ms, ns->pi_type);
 	if (ns->ms && !nvme_ns_has_pi(ns) && !blk_get_integrity(disk))
 		capacity = 0;
-	set_capacity(disk, capacity);
 
-	if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM)
-		nvme_config_discard(ns->ctrl, stream_alignment, disk->queue);
+	set_capacity(disk, capacity);
+	nvme_config_discard(ns);
 	blk_mq_unfreeze_queue(disk->queue);
 }
 
@@ -3317,7 +3321,7 @@ static void nvme_fw_act_work(struct work_struct *work)
 }
 
 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
-		union nvme_result *res)
+		volatile union nvme_result *res)
 {
 	u32 result = le32_to_cpu(res->u32);