IB/mthca: Don't use privileged UAR for kernel access

Make kernel use UAR2 instead of UAR1 for hardware access: this adds
sanity checking from the hardware side, without any performance cost.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/mthca/mthca_uar.c b/drivers/infiniband/hw/mthca/mthca_uar.c
index 8e9219842be42a687e08f20cfdd7a04a72e2ca65..8b728486410d12aef77f16563220624d766fad18 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_uar.c
+++ b/drivers/infiniband/hw/mthca/mthca_uar.c
@@ -60,7 +60,7 @@ int mthca_init_uar_table(struct mthca_dev *dev)
        ret = mthca_alloc_init(&dev->uar_table.alloc,
                               dev->limits.num_uars,
                               dev->limits.num_uars - 1,
-                              dev->limits.reserved_uars);
+                              dev->limits.reserved_uars + 1);
        if (ret)
                return ret;