nvme: use USEC_PER_SEC instead of magic numbers

Use USEC_PER_SEC instead of magic numbers to make code more readable.

Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c1de05646a02e807670765f16fd8d4363224d6d7..96898040a6d571e2725c2e760533599f89197f33 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2947,7 +2947,7 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
 
        if (id->rtd3e) {
                /* us -> s */
-               u32 transition_time = le32_to_cpu(id->rtd3e) / 1000000;
+               u32 transition_time = le32_to_cpu(id->rtd3e) / USEC_PER_SEC;
 
                ctrl->shutdown_timeout = clamp_t(unsigned int, transition_time,
                                                 shutdown_timeout, 60);