diff options
Diffstat (limited to 'drivers/nvme/nvme.c')
| -rw-r--r-- | drivers/nvme/nvme.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/nvme/nvme.c b/drivers/nvme/nvme.c index d92273e67f7..88679773a7a 100644 --- a/drivers/nvme/nvme.c +++ b/drivers/nvme/nvme.c @@ -47,11 +47,19 @@ struct nvme_queue { static int nvme_wait_ready(struct nvme_dev *dev, bool enabled) { u32 bit = enabled ? NVME_CSTS_RDY : 0; + int timeout; + ulong start; - while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) - udelay(10000); + /* Timeout field in the CAP register is in 500 millisecond units */ + timeout = NVME_CAP_TIMEOUT(dev->cap) * 500; - return 0; + start = get_timer(0); + while (get_timer(start) < timeout) { + if ((readl(&dev->bar->csts) & NVME_CSTS_RDY) == bit) + return 0; + } + + return -ETIME; } static int nvme_setup_prps(struct nvme_dev *dev, u64 *prp2, |