diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/nvme-core.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index 8efa728f1eac..9f2b424c445e 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -1739,10 +1739,15 @@ static int set_queue_count(struct nvme_dev *dev, int count) return min(result & 0xffff, result >> 16) + 1; } +static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) +{ + return 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); +} + static int nvme_setup_io_queues(struct nvme_dev *dev) { struct pci_dev *pdev = dev->pci_dev; - int result, cpu, i, vecs, nr_io_queues, db_bar_size, q_depth; + int result, cpu, i, vecs, nr_io_queues, size, q_depth; nr_io_queues = num_online_cpus(); result = set_queue_count(dev, nr_io_queues); @@ -1751,17 +1756,24 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) if (result < nr_io_queues) nr_io_queues = result; - /* Deregister the admin queue's interrupt */ - free_irq(dev->entry[0].vector, dev->queues[0]); - - db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); - if (db_bar_size > 8192) { + size = db_bar_size(dev, nr_io_queues); + if (size > 8192) { iounmap(dev->bar); - dev->bar = ioremap(pci_resource_start(pdev, 0), db_bar_size); + do { + dev->bar = ioremap(pci_resource_start(pdev, 0), size); + if (dev->bar) + break; + if (!--nr_io_queues) + return -ENOMEM; + size = db_bar_size(dev, nr_io_queues); + } while (1); dev->dbs = ((void __iomem *)dev->bar) + 4096; dev->queues[0]->q_db = dev->dbs; } + /* Deregister the admin queue's interrupt */ + free_irq(dev->entry[0].vector, dev->queues[0]); + vecs = nr_io_queues; for (i = 0; i < vecs; i++) dev->entry[i].entry = i; @@ -1799,8 +1811,10 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) nr_io_queues = vecs; result = queue_request_irq(dev, dev->queues[0], "nvme admin"); - if (result) + if (result) { + dev->queues[0]->q_suspended = 1; goto free_queues; + } /* Free previously allocated queues that are no longer usable */ spin_lock(&dev_list_lock); |