[ofa-general] [RFC][PATCH] IPoIB-cm: release connection if post_send drain WR failure

[Shirley Ma]

Hello Roland,

In case post_send drain WR failure, release connections in stale task.

Signed-off-by: Shirley Ma <xma at us.ibm.com>
--------------------------

 drivers/infiniband/ulp/ipoib/ipoib_cm.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 442dd49..06e5933 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1344,6 +1344,17 @@ static void ipoib_cm_stale_task(struct work_struct *work)
      int ret;

      spin_lock_irq(&priv->lock);
+     /* in case post drain WR failure, clean up connection here */
+     while (!list_empty(&priv->cm.rx_flush_list)) {
+           /* List is sorted by LRU, start from tail,
+            * stop when we see a recently used entry */
+           p = list_entry(priv->cm.rx_flush_list.prev, typeof(*p), list);
+           p->state = IPOIB_CM_RX_ERROR;
+           if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_DRAIN))
+                 break;
+           list_move(&p->list, &priv->cm.rx_reap_list);
+
+     }
      /* wait for the CQ drain, and clean up stale connections */
      while (!list_empty(&priv->cm.rx_error_list)) {
            /* List is sorted by LRU, start from tail,

(See attached file: post_drain_wr_failure.patch)

Shirley
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