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Commit 3e28c56b authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by Roland Dreier
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IB/mthca: Fix posting >255 recv WRs for Tavor 



Fix posting lists of > 255 receive WRs for Tavor: rq.next_ind must
be updated each doorbell, otherwise the next doorbell will use an
incorrect index.

Found by Ronni Zimmermann at Mellanox.

Signed-off-by: default avatarMichael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 6c719f5c

drivers/infiniband/hw/mthca/mthca_qp.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -1862,6 +1862,7 @@ int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, 
				      dev->kar + MTHCA_RECEIVE_DOORBELL,

				      dev->kar + MTHCA_RECEIVE_DOORBELL,

				      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));

				      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));





			qp->rq.next_ind = ind;

			qp->rq.head += MTHCA_TAVOR_MAX_WQES_PER_RECV_DB;

			qp->rq.head += MTHCA_TAVOR_MAX_WQES_PER_RECV_DB;

			size0 = 0;

			size0 = 0;

		}

		}