1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/cxgb4/ev.c b/drivers/infiniband/hw/cxgb4/ev.c
index c9df0549f51d..4498a89f4ced 100644
--- a/drivers/infiniband/hw/cxgb4/ev.c
+++ b/drivers/infiniband/hw/cxgb4/ev.c
@@ -225,13 +225,20 @@ int c4iw_ev_handler(struct c4iw_dev *dev, u32 qid)
         struct c4iw_cq *chp;
         unsigned long flag;
 
+        spin_lock_irqsave(&dev->lock, flag);
         chp = get_chp(dev, qid);
         if (chp) {
+                atomic_inc(&chp->refcnt);
+                spin_unlock_irqrestore(&dev->lock, flag);
                 t4_clear_cq_armed(&chp->cq);
                 spin_lock_irqsave(&chp->comp_handler_lock, flag);
                 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
                 spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
-        } else
+                if (atomic_dec_and_test(&chp->refcnt))
+                        wake_up(&chp->wait);
+        } else {
                 PDBG("%s unknown cqid 0x%x\n", __func__, qid);
+                spin_unlock_irqrestore(&dev->lock, flag);
+        }
         return 0;
 }