IB/ipath: Don't put QP in timeout queue if waiting to send
This fixes a problem which causes too many RC timeouts and retransmits. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -228,18 +228,13 @@ int ipath_make_rc_req(struct ipath_qp *qp,
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goto done;
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if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK) ||
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qp->s_rnr_timeout)
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qp->s_rnr_timeout || qp->s_wait_credit)
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goto bail;
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/* Limit the number of packets sent without an ACK. */
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if (ipath_cmp24(qp->s_psn, qp->s_last_psn + IPATH_PSN_CREDIT) > 0) {
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qp->s_wait_credit = 1;
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dev->n_rc_stalls++;
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spin_lock(&dev->pending_lock);
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if (list_empty(&qp->timerwait))
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list_add_tail(&qp->timerwait,
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&dev->pending[dev->pending_index]);
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spin_unlock(&dev->pending_lock);
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goto bail;
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}
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@ -422,7 +422,7 @@ struct ipath_qp {
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#define IPATH_S_RDMAR_PENDING 0x04
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#define IPATH_S_ACK_PENDING 0x08
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#define IPATH_PSN_CREDIT 2048
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#define IPATH_PSN_CREDIT 512
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/*
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* Since struct ipath_swqe is not a fixed size, we can't simply index into
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