nvme: Correct the prps per page calculation method

Each prp is 8 bytes, calculate the number of prps
per page should just divide page size by 8
there is no need to minus 1

Signed-off-by: Wesley Sheng <wesleyshenggit@sina.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/nvme/nvme.c b/drivers/nvme/nvme.c
index d554ec5..dc6c39b 100644 (file)
--- a/drivers/nvme/nvme.c
+++ b/drivers/nvme/nvme.c
@@ -81,7 +81,7 @@ static int nvme_setup_prps(struct nvme_dev *dev, u64 *prp2,
        u64 *prp_pool;
        int length = total_len;
        int i, nprps;
-       u32 prps_per_page = (page_size >> 3) - 1;
+       u32 prps_per_page = page_size >> 3;
        u32 num_pages;
 
        length -= (page_size - offset);