NTB: Do not advance transport RX on link down

On link down, don't advance RX index to the next entry.  The next entry
should never be valid after receiving the link down flag.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 8d9b59f7fa07ae167f847047e1f39bd47dfd7406..0f86b60a0c0eeba501d05983e8dbb1907d79e3d2 100644 (file)
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1212,8 +1212,7 @@ static int ntb_process_rxc(struct ntb_transport_qp *qp)
                dev_dbg(&qp->ndev->pdev->dev, "link down flag set\n");
                ntb_qp_link_down(qp);
                hdr->flags = 0;
-               iowrite32(qp->rx_index, &qp->rx_info->entry);
-               return 0;
+               return -EAGAIN;
        }
 
        if (hdr->ver != (u32)qp->rx_pkts) {