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RDMA/cxgb3: Don't pass irq flags to flush_qp()
Since flush_qp() is always called with irqs disabled, all the locking inside flush_qp() and __flush_qp() doesn't need irq save/restore. Further, passing the flag variable from iwch_modify_qp() is just wrong and causes a WARN_ON() in local_bh_enable(). Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
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@ -803,7 +803,7 @@ int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg)
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* Assumes qhp lock is held.
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*/
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static void __flush_qp(struct iwch_qp *qhp, struct iwch_cq *rchp,
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struct iwch_cq *schp, unsigned long *flag)
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struct iwch_cq *schp)
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{
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int count;
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int flushed;
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@ -812,44 +812,44 @@ static void __flush_qp(struct iwch_qp *qhp, struct iwch_cq *rchp,
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PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
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/* take a ref on the qhp since we must release the lock */
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atomic_inc(&qhp->refcnt);
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spin_unlock_irqrestore(&qhp->lock, *flag);
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spin_unlock(&qhp->lock);
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/* locking hierarchy: cq lock first, then qp lock. */
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spin_lock_irqsave(&rchp->lock, *flag);
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spin_lock(&rchp->lock);
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spin_lock(&qhp->lock);
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cxio_flush_hw_cq(&rchp->cq);
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cxio_count_rcqes(&rchp->cq, &qhp->wq, &count);
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flushed = cxio_flush_rq(&qhp->wq, &rchp->cq, count);
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spin_unlock(&qhp->lock);
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spin_unlock_irqrestore(&rchp->lock, *flag);
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spin_unlock(&rchp->lock);
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if (flushed) {
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spin_lock_irqsave(&rchp->comp_handler_lock, *flag);
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spin_lock(&rchp->comp_handler_lock);
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(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
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spin_unlock_irqrestore(&rchp->comp_handler_lock, *flag);
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spin_unlock(&rchp->comp_handler_lock);
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}
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/* locking hierarchy: cq lock first, then qp lock. */
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spin_lock_irqsave(&schp->lock, *flag);
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spin_lock(&schp->lock);
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spin_lock(&qhp->lock);
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cxio_flush_hw_cq(&schp->cq);
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cxio_count_scqes(&schp->cq, &qhp->wq, &count);
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flushed = cxio_flush_sq(&qhp->wq, &schp->cq, count);
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spin_unlock(&qhp->lock);
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spin_unlock_irqrestore(&schp->lock, *flag);
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spin_unlock(&schp->lock);
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if (flushed) {
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spin_lock_irqsave(&schp->comp_handler_lock, *flag);
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spin_lock(&schp->comp_handler_lock);
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(*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
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spin_unlock_irqrestore(&schp->comp_handler_lock, *flag);
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spin_unlock(&schp->comp_handler_lock);
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}
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/* deref */
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if (atomic_dec_and_test(&qhp->refcnt))
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wake_up(&qhp->wait);
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spin_lock_irqsave(&qhp->lock, *flag);
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spin_lock(&qhp->lock);
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}
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static void flush_qp(struct iwch_qp *qhp, unsigned long *flag)
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static void flush_qp(struct iwch_qp *qhp)
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{
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struct iwch_cq *rchp, *schp;
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@ -859,19 +859,19 @@ static void flush_qp(struct iwch_qp *qhp, unsigned long *flag)
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if (qhp->ibqp.uobject) {
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cxio_set_wq_in_error(&qhp->wq);
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cxio_set_cq_in_error(&rchp->cq);
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spin_lock_irqsave(&rchp->comp_handler_lock, *flag);
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spin_lock(&rchp->comp_handler_lock);
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(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
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spin_unlock_irqrestore(&rchp->comp_handler_lock, *flag);
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spin_unlock(&rchp->comp_handler_lock);
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if (schp != rchp) {
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cxio_set_cq_in_error(&schp->cq);
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spin_lock_irqsave(&schp->comp_handler_lock, *flag);
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spin_lock(&schp->comp_handler_lock);
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(*schp->ibcq.comp_handler)(&schp->ibcq,
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schp->ibcq.cq_context);
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spin_unlock_irqrestore(&schp->comp_handler_lock, *flag);
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spin_unlock(&schp->comp_handler_lock);
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}
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return;
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}
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__flush_qp(qhp, rchp, schp, flag);
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__flush_qp(qhp, rchp, schp);
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}
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@ -1030,7 +1030,7 @@ int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
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break;
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case IWCH_QP_STATE_ERROR:
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qhp->attr.state = IWCH_QP_STATE_ERROR;
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flush_qp(qhp, &flag);
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flush_qp(qhp);
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break;
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default:
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ret = -EINVAL;
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@ -1078,7 +1078,7 @@ int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
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}
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switch (attrs->next_state) {
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case IWCH_QP_STATE_IDLE:
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flush_qp(qhp, &flag);
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flush_qp(qhp);
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qhp->attr.state = IWCH_QP_STATE_IDLE;
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qhp->attr.llp_stream_handle = NULL;
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put_ep(&qhp->ep->com);
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@ -1132,7 +1132,7 @@ err:
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free=1;
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wake_up(&qhp->wait);
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BUG_ON(!ep);
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flush_qp(qhp, &flag);
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flush_qp(qhp);
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out:
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spin_unlock_irqrestore(&qhp->lock, flag);
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