1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c
index 85a4aefc6c03..8f32b17a5eed 100644
--- a/drivers/infiniband/hw/ipath/ipath_keys.c
+++ b/drivers/infiniband/hw/ipath/ipath_keys.c
@@ -128,9 +128,8 @@ int ipath_lkey_ok(struct ipath_qp *qp, struct ipath_sge *isge,
         int ret;
 
         /*
-         * We use LKEY == zero to mean a physical kmalloc() address.
-         * This is a bit of a hack since we rely on dma_map_single()
-         * being reversible by calling bus_to_virt().
+         * We use LKEY == zero for kernel virtual addresses
+         * (see ipath_get_dma_mr and ipath_dma.c).
          */
         if (sge->lkey == 0) {
                 struct ipath_pd *pd = to_ipd(qp->ibqp.pd);