From 8fe34be14ecb5eb0ef8d8d44aa7ab62d9e2911ca Mon Sep 17 00:00:00 2001 From: yangerkun Date: Tue, 23 Jul 2019 11:23:13 +0800 Subject: [PATCH] Revert "nvme-pci: don't create a read hctx mapping without read queues" This reverts commit 0298d5435276e7795b0b939d74827f6e775e7009. With this patch, set 'poll_queues > hard queues' will lead to 'nr_read_queues = 0' in nvme_calc_irq_sets. Then poll_queues setting can fail since dev->tagset.nr_maps equals to 2 and nvme_pci_map_queues will not do map for poll queues. Signed-off-by: yangerkun Signed-off-by: Christoph Hellwig --- drivers/nvme/host/pci.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index dd10cf78f2d3..db160cee42ad 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2254,9 +2254,7 @@ static int nvme_dev_add(struct nvme_dev *dev) if (!dev->ctrl.tagset) { dev->tagset.ops = &nvme_mq_ops; dev->tagset.nr_hw_queues = dev->online_queues - 1; - dev->tagset.nr_maps = 1; /* default */ - if (dev->io_queues[HCTX_TYPE_READ]) - dev->tagset.nr_maps++; + dev->tagset.nr_maps = 2; /* default + read */ if (dev->io_queues[HCTX_TYPE_POLL]) dev->tagset.nr_maps++; dev->tagset.timeout = NVME_IO_TIMEOUT;