diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-06-06 23:20:50 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-06-12 15:29:43 +0200 |
| commit | f5fa90dc0a5b0bcfa3fa851dbee9e3ab6381076b (patch) | |
| tree | 07a5c62291b435396d29792bb5361d5d4e488177 | |
| parent | nvme: factor out a add nvme_is_write helper (diff) | |
| download | linux-f5fa90dc0a5b0bcfa3fa851dbee9e3ab6381076b.tar.xz linux-f5fa90dc0a5b0bcfa3fa851dbee9e3ab6381076b.zip | |
nvme: move the workaround for I/O queue-less controllers from PCIe to core
We want to apply this to Fabrics drivers as well, so move it to common
code.
Reviewed-by: Jay Freyensee <james.p.freyensee@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Ming Lin <ming.l@ssi.samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/nvme/host/core.c | 17 | ||||
| -rw-r--r-- | drivers/nvme/host/pci.c | 10 |
2 files changed, 15 insertions, 12 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 45fd6cca4a27..9d7cee463fd6 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -574,11 +574,22 @@ int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, 0, &result); - if (status) + if (status < 0) return status; - nr_io_queues = min(result & 0xffff, result >> 16) + 1; - *count = min(*count, nr_io_queues); + /* + * Degraded controllers might return an error when setting the queue + * count. We still want to be able to bring them online and offer + * access to the admin queue, as that might be only way to fix them up. + */ + if (status > 0) { + dev_err(ctrl->dev, "Could not set queue count (%d)\n", status); + *count = 0; + } else { + nr_io_queues = min(result & 0xffff, result >> 16) + 1; + *count = min(*count, nr_io_queues); + } + return 0; } EXPORT_SYMBOL_GPL(nvme_set_queue_count); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 37aa25046eb8..dc39924362a3 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1383,16 +1383,8 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) if (result < 0) return result; - /* - * Degraded controllers might return an error when setting the queue - * count. We still want to be able to bring them online and offer - * access to the admin queue, as that might be only way to fix them up. - */ - if (result > 0) { - dev_err(dev->ctrl.device, - "Could not set queue count (%d)\n", result); + if (nr_io_queues == 0) return 0; - } if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { result = nvme_cmb_qdepth(dev, nr_io_queues, |