nvme: use ns->head->pi_size instead of t10_pi_tuple structure size

Currently kernel supports 8 byte and 16 byte protection information.
So, use ns->head->pi_size instead of sizeof(struct t10_pi_tuple).

Signed-off-by: Francis Pravin <francis.p@samsung.com>
Signed-off-by: Sathyavathi M <sathya.m@samsung.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 18f5c1be5d67e50ecef131bfe5b223e4e5eda5bd..3dfd5ae99ae05e892eb793cb3b21ba0b75dd6e98 100644 (file)
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -228,7 +228,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
        length = (io.nblocks + 1) << ns->head->lba_shift;
 
        if ((io.control & NVME_RW_PRINFO_PRACT) &&
-           ns->head->ms == sizeof(struct t10_pi_tuple)) {
+           (ns->head->ms == ns->head->pi_size)) {
                /*
                 * Protection information is stripped/inserted by the
                 * controller.