IB/ipath: replace uses of LIST_POISON

Per Andrew's request.

Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index b26146c..0924a21 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -375,10 +375,10 @@ static void ipath_error_qp(struct ipath_qp *qp)
 
        spin_lock(&dev->pending_lock);
        /* XXX What if its already removed by the timeout code? */
-       if (qp->timerwait.next != LIST_POISON1)
-               list_del(&qp->timerwait);
-       if (qp->piowait.next != LIST_POISON1)
-               list_del(&qp->piowait);
+       if (!list_empty(&qp->timerwait))
+               list_del_init(&qp->timerwait);
+       if (!list_empty(&qp->piowait))
+               list_del_init(&qp->piowait);
        spin_unlock(&dev->pending_lock);
 
        wc.status = IB_WC_WR_FLUSH_ERR;
@@ -712,10 +712,8 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
                             init_attr->qp_type == IB_QPT_RC ?
                             ipath_do_rc_send : ipath_do_uc_send,
                             (unsigned long)qp);
-               qp->piowait.next = LIST_POISON1;
-               qp->piowait.prev = LIST_POISON2;
-               qp->timerwait.next = LIST_POISON1;
-               qp->timerwait.prev = LIST_POISON2;
+               INIT_LIST_HEAD(&qp->piowait);
+               INIT_LIST_HEAD(&qp->timerwait);
                qp->state = IB_QPS_RESET;
                qp->s_wq = swq;
                qp->s_size = init_attr->cap.max_send_wr + 1;
@@ -785,10 +783,10 @@ int ipath_destroy_qp(struct ib_qp *ibqp)
 
        /* Make sure the QP isn't on the timeout list. */
        spin_lock_irqsave(&dev->pending_lock, flags);
-       if (qp->timerwait.next != LIST_POISON1)
-               list_del(&qp->timerwait);
-       if (qp->piowait.next != LIST_POISON1)
-               list_del(&qp->piowait);
+       if (!list_empty(&qp->timerwait))
+               list_del_init(&qp->timerwait);
+       if (!list_empty(&qp->piowait))
+               list_del_init(&qp->piowait);
        spin_unlock_irqrestore(&dev->pending_lock, flags);
 
        /*
@@ -857,10 +855,10 @@ void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc)
 
        spin_lock(&dev->pending_lock);
        /* XXX What if its already removed by the timeout code? */
-       if (qp->timerwait.next != LIST_POISON1)
-               list_del(&qp->timerwait);
-       if (qp->piowait.next != LIST_POISON1)
-               list_del(&qp->piowait);
+       if (!list_empty(&qp->timerwait))
+               list_del_init(&qp->timerwait);
+       if (!list_empty(&qp->piowait))
+               list_del_init(&qp->piowait);
        spin_unlock(&dev->pending_lock);
 
        ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);

diff --git a/drivers/infiniband/hw/ipath/ipath_rc.c b/drivers/infiniband/hw/ipath/ipath_rc.c
index a4055ca..493b182 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_rc.c
+++ b/drivers/infiniband/hw/ipath/ipath_rc.c
@@ -57,7 +57,7 @@ static void ipath_init_restart(struct ipath_qp *qp, struct ipath_swqe *wqe)
        qp->s_len = wqe->length - len;
        dev = to_idev(qp->ibqp.device);
        spin_lock(&dev->pending_lock);
-       if (qp->timerwait.next == LIST_POISON1)
+       if (list_empty(&qp->timerwait))
                list_add_tail(&qp->timerwait,
                              &dev->pending[dev->pending_index]);
        spin_unlock(&dev->pending_lock);
@@ -356,7 +356,7 @@ static inline int ipath_make_rc_req(struct ipath_qp *qp,
                if ((int)(qp->s_psn - qp->s_next_psn) > 0)
                        qp->s_next_psn = qp->s_psn;
                spin_lock(&dev->pending_lock);
-               if (qp->timerwait.next == LIST_POISON1)
+               if (list_empty(&qp->timerwait))
                        list_add_tail(&qp->timerwait,
                                      &dev->pending[dev->pending_index]);
                spin_unlock(&dev->pending_lock);
@@ -726,8 +726,8 @@ void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc)
         */
        dev = to_idev(qp->ibqp.device);
        spin_lock(&dev->pending_lock);
-       if (qp->timerwait.next != LIST_POISON1)
-               list_del(&qp->timerwait);
+       if (!list_empty(&qp->timerwait))
+               list_del_init(&qp->timerwait);
        spin_unlock(&dev->pending_lock);
 
        if (wqe->wr.opcode == IB_WR_RDMA_READ)
@@ -886,8 +886,8 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode)
         * just won't find anything to restart if we ACK everything.
         */
        spin_lock(&dev->pending_lock);
-       if (qp->timerwait.next != LIST_POISON1)
-               list_del(&qp->timerwait);
+       if (!list_empty(&qp->timerwait))
+               list_del_init(&qp->timerwait);
        spin_unlock(&dev->pending_lock);
 
        /*
@@ -1194,8 +1194,7 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
                     IB_WR_RDMA_READ))
                goto ack_done;
        spin_lock(&dev->pending_lock);
-       if (qp->s_rnr_timeout == 0 &&
-           qp->timerwait.next != LIST_POISON1)
+       if (qp->s_rnr_timeout == 0 && !list_empty(&qp->timerwait))
                list_move_tail(&qp->timerwait,
                               &dev->pending[dev->pending_index]);
        spin_unlock(&dev->pending_lock);

diff --git a/drivers/infiniband/hw/ipath/ipath_ruc.c b/drivers/infiniband/hw/ipath/ipath_ruc.c
index eb81424..d38f4f3 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_ruc.c
+++ b/drivers/infiniband/hw/ipath/ipath_ruc.c
@@ -435,7 +435,7 @@ void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev)
        unsigned long flags;
 
        spin_lock_irqsave(&dev->pending_lock, flags);
-       if (qp->piowait.next == LIST_POISON1)
+       if (list_empty(&qp->piowait))
                list_add_tail(&qp->piowait, &dev->piowait);
        spin_unlock_irqrestore(&dev->pending_lock, flags);
        /*

diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
index cb9e387..3adb86f 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
@@ -464,7 +464,7 @@ static void ipath_ib_timer(void *arg)
        last = &dev->pending[dev->pending_index];
        while (!list_empty(last)) {
                qp = list_entry(last->next, struct ipath_qp, timerwait);
-               list_del(&qp->timerwait);
+               list_del_init(&qp->timerwait);
                qp->timer_next = resend;
                resend = qp;
                atomic_inc(&qp->refcount);
@@ -474,7 +474,7 @@ static void ipath_ib_timer(void *arg)
                qp = list_entry(last->next, struct ipath_qp, timerwait);
                if (--qp->s_rnr_timeout == 0) {
                        do {
-                               list_del(&qp->timerwait);
+                               list_del_init(&qp->timerwait);
                                tasklet_hi_schedule(&qp->s_task);
                                if (list_empty(last))
                                        break;
@@ -554,7 +554,7 @@ static int ipath_ib_piobufavail(void *arg)
        while (!list_empty(&dev->piowait)) {
                qp = list_entry(dev->piowait.next, struct ipath_qp,
                                piowait);
-               list_del(&qp->piowait);
+               list_del_init(&qp->piowait);
                tasklet_hi_schedule(&qp->s_task);
        }
        spin_unlock_irqrestore(&dev->pending_lock, flags);