IB/mthca: Remove checks for srq->first_free < 0

The SRQ receive posting functions make sure that srq->first_free never
becomes negative, so we can remove tests of whether it is negative.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index 553d681f6813a709a2d8e2a5601c8e1dc98bc902..ec63adc1099c7da71c583e13ad232bc1fcd5a8bc 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -475,11 +475,7 @@ void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr)
 
        spin_lock(&srq->lock);
 
-       if (likely(srq->first_free >= 0))
-               *wqe_to_link(get_wqe(srq, srq->last_free)) = ind;
-       else
-               srq->first_free = ind;
-
+       *wqe_to_link(get_wqe(srq, srq->last_free)) = ind;
        *wqe_to_link(get_wqe(srq, ind)) = -1;
        srq->last_free = ind;
 
@@ -506,15 +502,7 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
        first_ind = srq->first_free;
 
        for (nreq = 0; wr; wr = wr->next) {
-               ind = srq->first_free;
-
-               if (unlikely(ind < 0)) {
-                       mthca_err(dev, "SRQ %06x full\n", srq->srqn);
-                       err = -ENOMEM;
-                       *bad_wr = wr;
-                       break;
-               }
-
+               ind       = srq->first_free;
                wqe       = get_wqe(srq, ind);
                next_ind  = *wqe_to_link(wqe);
 
@@ -614,15 +602,7 @@ int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
        spin_lock_irqsave(&srq->lock, flags);
 
        for (nreq = 0; wr; ++nreq, wr = wr->next) {
-               ind = srq->first_free;
-
-               if (unlikely(ind < 0)) {
-                       mthca_err(dev, "SRQ %06x full\n", srq->srqn);
-                       err = -ENOMEM;
-                       *bad_wr = wr;
-                       break;
-               }
-
+               ind       = srq->first_free;
                wqe       = get_wqe(srq, ind);
                next_ind  = *wqe_to_link(wqe);