diff options
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_sendto.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index 0ebdc0c76483..edfeca45ac1c 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -253,41 +253,41 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc) svc_xprt_put(&rdma->sc_xprt); } +/** + * svc_rdma_send - Post a single Send WR + * @rdma: transport on which to post the WR + * @wr: prepared Send WR to post + * + * Returns zero the Send WR was posted successfully. Otherwise, a + * negative errno is returned. + */ int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr) { - struct ib_send_wr *bad_wr, *n_wr; - int wr_count; - int i; + struct ib_send_wr *bad_wr; int ret; - wr_count = 1; - for (n_wr = wr->next; n_wr; n_wr = n_wr->next) - wr_count++; + might_sleep(); /* If the SQ is full, wait until an SQ entry is available */ while (1) { - if ((atomic_sub_return(wr_count, &rdma->sc_sq_avail) < 0)) { + if ((atomic_dec_return(&rdma->sc_sq_avail) < 0)) { atomic_inc(&rdma_stat_sq_starve); trace_svcrdma_sq_full(rdma); - atomic_add(wr_count, &rdma->sc_sq_avail); + atomic_inc(&rdma->sc_sq_avail); wait_event(rdma->sc_send_wait, - atomic_read(&rdma->sc_sq_avail) > wr_count); + atomic_read(&rdma->sc_sq_avail) > 1); if (test_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags)) return -ENOTCONN; trace_svcrdma_sq_retry(rdma); continue; } - /* Take a transport ref for each WR posted */ - for (i = 0; i < wr_count; i++) - svc_xprt_get(&rdma->sc_xprt); - /* Bump used SQ WR count and post */ + svc_xprt_get(&rdma->sc_xprt); ret = ib_post_send(rdma->sc_qp, wr, &bad_wr); trace_svcrdma_post_send(wr, ret); if (ret) { set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags); - for (i = 0; i < wr_count; i++) - svc_xprt_put(&rdma->sc_xprt); + svc_xprt_put(&rdma->sc_xprt); wake_up(&rdma->sc_send_wait); } break; |