X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Finfiniband%2Fhw%2Fipath%2Fipath_keys.c;h=c0e933fec2187d37c1d40b59f78ad4feea90c367;hb=58f02db466900003b801bdfdeddc4d96ce42b7d5;hp=85a4aefc6c03cbbb94f63af4eade1f92a36f91fe;hpb=b4b613fd83853f8c688b3de20ab1a42331257975;p=mv-sheeva.git

diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c
index 85a4aefc6c0..c0e933fec21 100644
--- a/drivers/infiniband/hw/ipath/ipath_keys.c
+++ b/drivers/infiniband/hw/ipath/ipath_keys.c
@@ -128,11 +128,11 @@ 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) {
+		/* always a kernel port, no locking needed */
 		struct ipath_pd *pd = to_ipd(qp->ibqp.pd);
 
 		if (pd->user) {
@@ -212,6 +212,7 @@ int ipath_rkey_ok(struct ipath_qp *qp, struct ipath_sge_state *ss,
 	 * (see ipath_get_dma_mr and ipath_dma.c).
 	 */
 	if (rkey == 0) {
+		/* always a kernel port, no locking needed */
 		struct ipath_pd *pd = to_ipd(qp->ibqp.pd);
 
 		if (pd->user) {