diff options
| -rw-r--r-- | sys/alpha/alpha/busdma_machdep.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/alpha/alpha/busdma_machdep.c b/sys/alpha/alpha/busdma_machdep.c index ee2ee41..a7eb1c5 100644 --- a/sys/alpha/alpha/busdma_machdep.c +++ b/sys/alpha/alpha/busdma_machdep.c @@ -891,6 +891,10 @@ _bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op) } } } + + /* Ensure any pending writes have drained. */ + if (op & (BUS_DMASYNC_PREWRITE)) + alpha_mb(); } static void |
