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Assume that the timeout value from the capacity is 1-based

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Neither the 1.3 or 1.4 standards say this number is 1's based, but adding 1
costs little and copes with those NVMe drives that report '0' in this field
cheaply. This is consistent with what the Linux driver does as well.
This commit is contained in:
Warner Losh 2019-07-16 22:55:30 +00:00
parent 1575a795cb
commit dc9df3a59d
1 changed files with 1 additions and 1 deletions
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2
sys/dev/nvme/nvme_ctrlr.c
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@ -1255,7 +1255,7 @@ nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev)
/* Get ready timeout value from controller, in units of 500ms. */
cap_lo = nvme_mmio_read_4(ctrlr, cap_lo);
to = (cap_lo >> NVME_CAP_LO_REG_TO_SHIFT) & NVME_CAP_LO_REG_TO_MASK;
to = ((cap_lo >> NVME_CAP_LO_REG_TO_SHIFT) & NVME_CAP_LO_REG_TO_MASK) + 1;
ctrlr->ready_timeout_in_ms = to * 500;
timeout_period = NVME_DEFAULT_TIMEOUT_PERIOD;