diff options
Diffstat (limited to 'drivers/misc/genwqe/card_ddcb.c')
| -rw-r--r-- | drivers/misc/genwqe/card_ddcb.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/genwqe/card_ddcb.c b/drivers/misc/genwqe/card_ddcb.c index 6f1acc0ccf8..29a1a28be02 100644 --- a/drivers/misc/genwqe/card_ddcb.c +++ b/drivers/misc/genwqe/card_ddcb.c @@ -305,6 +305,8 @@ static int enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_queue *queue, break; new = (old | DDCB_NEXT_BE32); + + wmb(); icrc_hsi_shi = cmpxchg(&prev_ddcb->icrc_hsi_shi_32, old, new); if (icrc_hsi_shi == old) @@ -314,6 +316,8 @@ static int enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_queue *queue, /* Queue must be re-started by updating QUEUE_OFFSET */ ddcb_mark_tapped(pddcb); num = (u64)ddcb_no << 8; + + wmb(); __genwqe_writeq(cd, queue->IO_QUEUE_OFFSET, num); /* start queue */ return RET_DDCB_TAPPED; |