X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Finfiniband%2Fhw%2Fmthca%2Fmthca_cq.c;h=8030d6adee08dd25f775b98b328dbde507b1b146;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=205854e9c662809b49576b1ea8c3eb213e44ce72;hpb=4e76c8a9fa413ccc09d3f7f664183dcce3555d57;p=linux-2.6.git

diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index 205854e9c..8030d6ade 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -39,6 +39,8 @@
 #include <linux/init.h>
 #include <linux/hardirq.h>
 
+#include <asm/io.h>
+
 #include <rdma/ib_pack.h>
 
 #include "mthca_dev.h"
@@ -210,6 +212,11 @@ static inline void update_cons_index(struct mthca_dev *dev, struct mthca_cq *cq,
 		mthca_write64(doorbell,
 			      dev->kar + MTHCA_CQ_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+		/*
+		 * Make sure doorbells don't leak out of CQ spinlock
+		 * and reach the HCA out of order:
+		 */
+		mmiowb();
 	}
 }
 
@@ -540,8 +547,17 @@ static inline int mthca_poll_one(struct mthca_dev *dev,
 		entry->wr_id = srq->wrid[wqe_index];
 		mthca_free_srq_wqe(srq, wqe);
 	} else {
+		s32 wqe;
 		wq = &(*cur_qp)->rq;
-		wqe_index = be32_to_cpu(cqe->wqe) >> wq->wqe_shift;
+		wqe = be32_to_cpu(cqe->wqe);
+		wqe_index = wqe >> wq->wqe_shift;
+               /*
+		* WQE addr == base - 1 might be reported in receive completion
+		* with error instead of (rq size - 1) by Sinai FW 1.0.800 and
+		* Arbel FW 5.1.400.  This bug should be fixed in later FW revs.
+		*/
+		if (unlikely(wqe_index < 0))
+			wqe_index = wq->max - 1;
 		entry->wr_id = (*cur_qp)->wrid[wqe_index];
 	}
 
@@ -813,6 +829,7 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
 	spin_lock_init(&cq->lock);
 	cq->refcount = 1;
 	init_waitqueue_head(&cq->wait);
+	mutex_init(&cq->mutex);
 
 	memset(cq_context, 0, sizeof *cq_context);
 	cq_context->flags           = cpu_to_be32(MTHCA_CQ_STATUS_OK      |