IB/mthca: Fix check of max_send_sge for special QPs

The MLX transport requires two extra gather entries for sends (one for
the header and one for the checksum at the end, as the comment says).
However the code checked that max_recv_sge was not too big, instead of
checking max_send_sge as it should have.  Fix the code to check the
correct condition.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index 77b52b3adcc7fe6819f67c0a6e6d88ea802c1012..f5081bfde6db19641ce62cb3638139caebb6f880 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -1249,10 +1249,10 @@ static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap,
                return -EINVAL;
 
        /*
-        * For MLX transport we need 2 extra S/G entries:
+        * For MLX transport we need 2 extra send gather entries:
         * one for the header and one for the checksum at the end
         */
-       if (qp->transport == MLX && cap->max_recv_sge + 2 > dev->limits.max_sg)
+       if (qp->transport == MLX && cap->max_send_sge + 2 > dev->limits.max_sg)
                return -EINVAL;
 
        if (mthca_is_memfree(dev)) {