On Mon, 20 Jan 2014, Alexander Gordeev wrote:
This is an attempt to make handling of admin queue in a single scope. This update also fixes a IRQ leak in case nvme_setup_io_queues() failed to allocate enough iomem and bailed out with -ENOMEM errno.
This definitely seems to improve the code flow, but this leak was already fixed in the latest linux-nvme tree with this commit: http://git.infradead.org/users/willy/linux-nvme.git/commit/c5dc9192d52a4a3a479f701e97386347d454af84
Signed-off-by: Alexander Gordeev <agord...@redhat.com> --- drivers/block/nvme-core.c | 44 +++++++++++++++++++++++--------------------- 1 files changed, 23 insertions(+), 21 deletions(-) diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index 3e1ae55..e1e4ad4 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -1287,6 +1287,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) if (result) return result; + dev->entry[0].vector = pdev->pci_dev->irq; result = queue_request_irq(dev, nvmeq, "nvme admin"); if (result) return result; @@ -1297,6 +1298,11 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) return result; } +static int nvme_teardown_admin_queue(struct nvme_dev *dev) +{ + free_irq(dev->entry[0].vector, dev->queues[0]); +} + struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, unsigned long addr, unsigned length) { @@ -1744,17 +1750,10 @@ 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) +static int nvme_setup_io_queues(struct nvme_dev *dev, int nr_io_queues) { struct pci_dev *pdev = dev->pci_dev; - 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); - if (result < 0) - return result; - if (result < nr_io_queues) - nr_io_queues = result; + int result, cpu, i, vecs, size, q_depth; size = db_bar_size(dev, nr_io_queues); if (size > 8192) { @@ -1771,20 +1770,15 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) dev->queues[0]->q_db = dev->dbs; } - /* Deregister the admin queue's interrupt */ - free_irq(dev->entry[0].vector, dev->queues[0]); - for (i = 0; i < nr_io_queues; i++) dev->entry[i].entry = i; vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); if (vecs < 0) { vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); - if (vecs < 0) { + if (vecs < 0) vecs = 1; - } else { - for (i = 0; i < vecs; i++) - dev->entry[i].vector = i + pdev->irq; - } + for (i = 0; i < vecs; i++) + dev->entry[i].vector = i + pdev->irq; } /* @@ -1928,7 +1922,6 @@ static int nvme_dev_map(struct nvme_dev *dev) if (pci_enable_device_mem(pdev)) return result; - dev->entry[0].vector = pdev->irq; pci_set_master(pdev); bars = pci_select_bars(pdev, IORESOURCE_MEM); if (pci_request_selected_regions(pdev, bars, "nvme")) @@ -2116,11 +2109,20 @@ static int nvme_dev_start(struct nvme_dev *dev) list_add(&dev->node, &dev_list); spin_unlock(&dev_list_lock); - result = nvme_setup_io_queues(dev); - if (result && result != -EBUSY) + result = set_queue_count(dev, num_online_cpus()); + if (result == -EBUSY) + return -EBUSY; + + nvme_teardown_admin_queue(dev); + + if (result) goto disable; - return result; + result = nvme_setup_io_queues(dev, result); + if (result) + goto disable; + + return 0; disable: spin_lock(&dev_list_lock); --
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