Merge tag 'v4.10-rc1' into patchwork

Linux 4.10-rc1

* tag 'v4.10-rc1': (11427 commits)
  Linux 4.10-rc1
  powerpc: Fix build warning on 32-bit PPC
  avoid spurious "may be used uninitialized" warning
  mm: add PageWaiters indicating tasks are waiting for a page bit
  mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked
  ktime: Get rid of ktime_equal()
  ktime: Cleanup ktime_set() usage
  ktime: Get rid of the union
  clocksource: Use a plain u64 instead of cycle_t
  irqchip/armada-xp: Consolidate hotplug state space
  irqchip/gic: Consolidate hotplug state space
  coresight/etm3/4x: Consolidate hotplug state space
  cpu/hotplug: Cleanup state names
  cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
  staging/lustre/libcfs: Convert to hotplug state machine
  scsi/bnx2i: Convert to hotplug state machine
  scsi/bnx2fc: Convert to hotplug state machine
  cpu/hotplug: Prevent overwriting of callbacks
  x86/msr: Remove bogus cleanup from the error path
  bus: arm-ccn: Prevent hotplug callback leak
  ...

1 files changed, 45 insertions, 31 deletions

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 5e52034ab010..3d21a154dce7 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -50,7 +50,7 @@
 #define NVME_AQ_DEPTH		256
 #define SQ_SIZE(depth)		(depth * sizeof(struct nvme_command))
 #define CQ_SIZE(depth)		(depth * sizeof(struct nvme_completion))
-		
+
 /*
  * We handle AEN commands ourselves and don't even let the
  * block layer know about them.
@@ -141,6 +141,7 @@ struct nvme_queue {
  * allocated to store the PRP list.
  */
 struct nvme_iod {
+	struct nvme_request req;
 	struct nvme_queue *nvmeq;
 	int aborted;
 	int npages;		/* In the PRP list. 0 means small pool in use */
@@ -302,14 +303,14 @@ static void __nvme_submit_cmd(struct nvme_queue *nvmeq,
 static __le64 **iod_list(struct request *req)
 {
 	struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
-	return (__le64 **)(iod->sg + req->nr_phys_segments);
+	return (__le64 **)(iod->sg + blk_rq_nr_phys_segments(req));
 }
 
 static int nvme_init_iod(struct request *rq, unsigned size,
 		struct nvme_dev *dev)
 {
 	struct nvme_iod *iod = blk_mq_rq_to_pdu(rq);
-	int nseg = rq->nr_phys_segments;
+	int nseg = blk_rq_nr_phys_segments(rq);
 
 	if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) {
 		iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC);
@@ -324,11 +325,11 @@ static int nvme_init_iod(struct request *rq, unsigned size,
 	iod->nents = 0;
 	iod->length = size;
 
-	if (!(rq->cmd_flags & REQ_DONTPREP)) {
+	if (!(rq->rq_flags & RQF_DONTPREP)) {
 		rq->retries = 0;
-		rq->cmd_flags |= REQ_DONTPREP;
+		rq->rq_flags |= RQF_DONTPREP;
 	}
-	return 0;
+	return BLK_MQ_RQ_QUEUE_OK;
 }
 
 static void nvme_free_iod(struct nvme_dev *dev, struct request *req)
@@ -339,8 +340,6 @@ static void nvme_free_iod(struct nvme_dev *dev, struct request *req)
 	__le64 **list = iod_list(req);
 	dma_addr_t prp_dma = iod->first_dma;
 
-	nvme_cleanup_cmd(req);
-
 	if (iod->npages == 0)
 		dma_pool_free(dev->prp_small_pool, list[0], prp_dma);
 	for (i = 0; i < iod->npages; i++) {
@@ -510,7 +509,7 @@ static int nvme_map_data(struct nvme_dev *dev, struct request *req,
 			DMA_TO_DEVICE : DMA_FROM_DEVICE;
 	int ret = BLK_MQ_RQ_QUEUE_ERROR;
 
-	sg_init_table(iod->sg, req->nr_phys_segments);
+	sg_init_table(iod->sg, blk_rq_nr_phys_segments(req));
 	iod->nents = blk_rq_map_sg(q, req, iod->sg);
 	if (!iod->nents)
 		goto out;
@@ -566,6 +565,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct request *req)
 		}
 	}
 
+	nvme_cleanup_cmd(req);
 	nvme_free_iod(dev, req);
 }
 
@@ -596,22 +596,21 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
 		}
 	}
 
-	map_len = nvme_map_len(req);
-	ret = nvme_init_iod(req, map_len, dev);
-	if (ret)
+	ret = nvme_setup_cmd(ns, req, &cmnd);
+	if (ret != BLK_MQ_RQ_QUEUE_OK)
 		return ret;
 
-	ret = nvme_setup_cmd(ns, req, &cmnd);
-	if (ret)
-		goto out;
+	map_len = nvme_map_len(req);
+	ret = nvme_init_iod(req, map_len, dev);
+	if (ret != BLK_MQ_RQ_QUEUE_OK)
+		goto out_free_cmd;
 
-	if (req->nr_phys_segments)
+	if (blk_rq_nr_phys_segments(req))
 		ret = nvme_map_data(dev, req, map_len, &cmnd);
 
-	if (ret)
-		goto out;
+	if (ret != BLK_MQ_RQ_QUEUE_OK)
+		goto out_cleanup_iod;
 
-	cmnd.common.command_id = req->tag;
 	blk_mq_start_request(req);
 
 	spin_lock_irq(&nvmeq->q_lock);
@@ -621,14 +620,16 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
 		else
 			ret = BLK_MQ_RQ_QUEUE_ERROR;
 		spin_unlock_irq(&nvmeq->q_lock);
-		goto out;
+		goto out_cleanup_iod;
 	}
 	__nvme_submit_cmd(nvmeq, &cmnd);
 	nvme_process_cq(nvmeq);
 	spin_unlock_irq(&nvmeq->q_lock);
 	return BLK_MQ_RQ_QUEUE_OK;
-out:
+out_cleanup_iod:
 	nvme_free_iod(dev, req);
+out_free_cmd:
+	nvme_cleanup_cmd(req);
 	return ret;
 }
 
@@ -703,13 +704,13 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag)
 		 */
 		if (unlikely(nvmeq->qid == 0 &&
 				cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) {
-			nvme_complete_async_event(&nvmeq->dev->ctrl, &cqe);
+			nvme_complete_async_event(&nvmeq->dev->ctrl,
+					cqe.status, &cqe.result);
 			continue;
 		}
 
 		req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id);
-		if (req->cmd_type == REQ_TYPE_DRV_PRIV && req->special)
-			memcpy(req->special, &cqe, sizeof(cqe));
+		nvme_req(req)->result = cqe.result;
 		blk_mq_complete_request(req, le16_to_cpu(cqe.status) >> 1);
 
 	}
@@ -1281,6 +1282,24 @@ static bool nvme_should_reset(struct nvme_dev *dev, u32 csts)
 	return true;
 }
 
+static void nvme_warn_reset(struct nvme_dev *dev, u32 csts)
+{
+	/* Read a config register to help see what died. */
+	u16 pci_status;
+	int result;
+
+	result = pci_read_config_word(to_pci_dev(dev->dev), PCI_STATUS,
+				      &pci_status);
+	if (result == PCIBIOS_SUCCESSFUL)
+		dev_warn(dev->dev,
+			 "controller is down; will reset: CSTS=0x%x, PCI_STATUS=0x%hx\n",
+			 csts, pci_status);
+	else
+		dev_warn(dev->dev,
+			 "controller is down; will reset: CSTS=0x%x, PCI_STATUS read failed (%d)\n",
+			 csts, result);
+}
+
 static void nvme_watchdog_timer(unsigned long data)
 {
 	struct nvme_dev *dev = (struct nvme_dev *)data;
@@ -1289,9 +1308,7 @@ static void nvme_watchdog_timer(unsigned long data)
 	/* Skip controllers under certain specific conditions. */
 	if (nvme_should_reset(dev, csts)) {
 		if (!nvme_reset(dev))
-			dev_warn(dev->dev,
-				"Failed status: 0x%x, reset controller.\n",
-				csts);
+			nvme_warn_reset(dev, csts);
 		return;
 	}
 
@@ -1332,7 +1349,7 @@ static ssize_t nvme_cmb_show(struct device *dev,
 {
 	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
 
-	return snprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz  : x%08x\n",
+	return scnprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz  : x%08x\n",
 		       ndev->cmbloc, ndev->cmbsz);
 }
 static DEVICE_ATTR(cmb, S_IRUGO, nvme_cmb_show, NULL);
@@ -2085,9 +2102,6 @@ static const struct pci_error_handlers nvme_err_handler = {
 	.reset_notify	= nvme_reset_notify,
 };
 
-/* Move to pci_ids.h later */
-#define PCI_CLASS_STORAGE_EXPRESS	0x010802
-
 static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_VDEVICE(INTEL, 0x0953),
 		.driver_data = NVME_QUIRK_STRIPE_SIZE |