[3/3] IB/iser: use IB_CQ_REPORT_MISSED_EVENTS to avoid missed CQ callbacks

Commit Message

Ralph Campbell March 31, 2010, 5:57 p.m. UTC

None

Patch

diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 308d17b..8cfd1c0 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -783,8 +783,11 @@  static void iser_cq_tasklet_fn(unsigned long data)
 	 unsigned long	     xfer_len;
 	struct iser_conn *ib_conn;
 	int completed_tx, completed_rx;
+	int ret;
+
 	completed_tx = completed_rx = 0;
 
+again:
 	while (ib_poll_cq(cq, 1, &wc) == 1) {
 		desc	 = (struct iser_rx_desc *) (unsigned long) wc.wr_id;
 		BUG_ON(desc == NULL);
@@ -807,9 +810,10 @@  static void iser_cq_tasklet_fn(unsigned long data)
 		if (!(completed_rx & 63))
 			completed_tx += iser_drain_tx_cq(device);
 	}
-	/* #warning "it is assumed here that arming CQ only once its empty" *
-	 * " would not cause interrupts to be missed"                       */
-	ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
+	ret = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP |
+				   IB_CQ_REPORT_MISSED_EVENTS);
+	if (ret > 0)
+		goto again;
 
 	completed_tx += iser_drain_tx_cq(device);
 	iser_dbg("got %d rx %d tx completions\n", completed_rx, completed_tx);