1 files changed, 59 insertions, 1 deletions

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 897719b49f96..a333b42111b8 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -776,6 +776,53 @@ static int ehea_proc_rwqes(struct net_device *dev,
         return processed;
 }
 
+#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
+
+static void reset_sq_restart_flag(struct ehea_port *port)
+{
+        int i;
+
+        for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+                struct ehea_port_res *pr = &port->port_res[i];
+                pr->sq_restart_flag = 0;
+        }
+}
+
+static void check_sqs(struct ehea_port *port)
+{
+        struct ehea_swqe *swqe;
+        int swqe_index;
+        int i, k;
+
+        for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+                struct ehea_port_res *pr = &port->port_res[i];
+                k = 0;
+                swqe = ehea_get_swqe(pr->qp, &swqe_index);
+                memset(swqe, 0, SWQE_HEADER_SIZE);
+                atomic_dec(&pr->swqe_avail);
+
+                swqe->tx_control |= EHEA_SWQE_PURGE;
+                swqe->wr_id = SWQE_RESTART_CHECK;
+                swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
+                swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
+                swqe->immediate_data_length = 80;
+
+                ehea_post_swqe(pr->qp, swqe);
+
+                while (pr->sq_restart_flag == 0) {
+                        msleep(5);
+                        if (++k == 100) {
+                                ehea_error("HW/SW queues out of sync");
+                                ehea_schedule_port_reset(pr->port);
+                                return;
+                        }
+                }
+        }
+
+        return;
+}
+
+
 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 {
         struct sk_buff *skb;
@@ -793,6 +840,13 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 
                 cqe_counter++;
                 rmb();
+
+                if (cqe->wr_id == SWQE_RESTART_CHECK) {
+                        pr->sq_restart_flag = 1;
+                        swqe_av++;
+                        break;
+                }
+
                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
                         ehea_error("Bad send completion status=0x%04X",
                                    cqe->status);
@@ -2675,8 +2729,10 @@ static void ehea_flush_sq(struct ehea_port *port)
                 int k = 0;
                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
                         msleep(5);
-                        if (++k == 20)
+                        if (++k == 20) {
+                                ehea_error("WARNING: sq not flushed completely");
                                 break;
+                        }
                 }
         }
 }
@@ -2917,6 +2973,7 @@ static void ehea_rereg_mrs(struct work_struct *work)
                                         port_napi_disable(port);
                                         mutex_unlock(&port->port_lock);
                                 }
+                                reset_sq_restart_flag(port);
                         }
 
                         /* Unregister old memory region */
@@ -2951,6 +3008,7 @@ static void ehea_rereg_mrs(struct work_struct *work)
                                                 mutex_lock(&port->port_lock);
                                                 port_napi_enable(port);
                                                 ret = ehea_restart_qps(dev);
+                                                check_sqs(port);
                                                 if (!ret)
                                                         netif_wake_queue(dev);
                                                 mutex_unlock(&port->port_lock);