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| author | Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2020-06-17 10:05:13 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-07-08 16:16:16 +0200 |
| commit | 61f3b89630973037f67d8e25e5d26e80a51a7b37 (patch) | |
| tree | 61f3f8444e76c3eaaf5d281f8d5c819d7d22f7c9 /drivers | |
| parent | d4047cf99421d434660a5a0c61ac3e83b4ad0dad (diff) | |
| download | linux-61f3b89630973037f67d8e25e5d26e80a51a7b37.tar.bz2 | |
nvme-pci: use unsigned for io queue depth
The NVMe PCIe declares module parameter io_queue_depth as int. Change
this to u16 as queue depth can never be negative. Now to reflect this
update module parameter getter function from param_get_int() ->
param_get_uint() and respective setter function with type of n changed
from int to u16 with param_set_int() to param_set_ushort(). Finally
update struct nvme_dev q_depth member to u16 and use u16 in min_t()
when calculating dev->q_depth in the nvme_pci_enable() (since q_depth is
now u16) and use unsigned int instead of int when calculating
dev->tagset.queue_depth as target variable tagset->queue_depth is of type
unsigned int in nvme_dev_add().
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/pci.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 74a2e2e00794..7ed1e2dfbee6 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -61,10 +61,10 @@ MODULE_PARM_DESC(sgl_threshold, static int io_queue_depth_set(const char *val, const struct kernel_param *kp); static const struct kernel_param_ops io_queue_depth_ops = { .set = io_queue_depth_set, - .get = param_get_int, + .get = param_get_uint, }; -static int io_queue_depth = 1024; +static unsigned int io_queue_depth = 1024; module_param_cb(io_queue_depth, &io_queue_depth_ops, &io_queue_depth, 0644); MODULE_PARM_DESC(io_queue_depth, "set io queue depth, should >= 2"); @@ -115,7 +115,7 @@ struct nvme_dev { unsigned max_qid; unsigned io_queues[HCTX_MAX_TYPES]; unsigned int num_vecs; - int q_depth; + u16 q_depth; int io_sqes; u32 db_stride; void __iomem *bar; @@ -151,13 +151,14 @@ struct nvme_dev { static int io_queue_depth_set(const char *val, const struct kernel_param *kp) { - int n = 0, ret; + int ret; + u16 n; - ret = kstrtoint(val, 10, &n); + ret = kstrtou16(val, 10, &n); if (ret != 0 || n < 2) return -EINVAL; - return param_set_int(val, kp); + return param_set_ushort(val, kp); } static inline unsigned int sq_idx(unsigned int qid, u32 stride) @@ -2261,8 +2262,8 @@ static void nvme_dev_add(struct nvme_dev *dev) dev->tagset.nr_maps++; dev->tagset.timeout = NVME_IO_TIMEOUT; dev->tagset.numa_node = dev->ctrl.numa_node; - dev->tagset.queue_depth = - min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; + dev->tagset.queue_depth = min_t(unsigned int, dev->q_depth, + BLK_MQ_MAX_DEPTH) - 1; dev->tagset.cmd_size = sizeof(struct nvme_iod); dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; dev->tagset.driver_data = dev; @@ -2321,7 +2322,7 @@ static int nvme_pci_enable(struct nvme_dev *dev) dev->ctrl.cap = lo_hi_readq(dev->bar + NVME_REG_CAP); - dev->q_depth = min_t(int, NVME_CAP_MQES(dev->ctrl.cap) + 1, + dev->q_depth = min_t(u16, NVME_CAP_MQES(dev->ctrl.cap) + 1, io_queue_depth); dev->ctrl.sqsize = dev->q_depth - 1; /* 0's based queue depth */ dev->db_stride = 1 << NVME_CAP_STRIDE(dev->ctrl.cap); |