IB/qib: Change lkey table allocation to support more MRs

[firefly-linux-kernel-4.4.55.git] / drivers / infiniband / hw / qib / qib_keys.c

diff --git a/drivers/infiniband/hw/qib/qib_keys.c b/drivers/infiniband/hw/qib/qib_keys.c
index 3b9afccaaade824370f5c0ea0d6d6ceb519e6090..eabe54738be61359fc97d8c61f4c85d7a1092277 100644 (file)
--- a/drivers/infiniband/hw/qib/qib_keys.c
+++ b/drivers/infiniband/hw/qib/qib_keys.c
@@ -86,6 +86,10 @@ int qib_alloc_lkey(struct qib_mregion *mr, int dma_region)
         * unrestricted LKEY.
         */
        rkt->gen++;
+       /*
+        * bits are capped in qib_verbs.c to insure enough bits
+        * for generation number
+        */
        mr->lkey = (r << (32 - ib_qib_lkey_table_size)) |
                ((((1 << (24 - ib_qib_lkey_table_size)) - 1) & rkt->gen)
                 << 8);