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nvmf/rdma: Replace the queue empty check

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Replace with it with check the returned req
via spdk_unlikely macro

Change-Id: I1202b3955af9a68496d8ced7cf66c20cf26f7fff
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
This commit is contained in:
Ziye Yang 2017-05-05 14:59:58 +08:00 committed by Daniel Verkamp
parent 730a63d02b
commit e48e569d83
1 changed files with 3 additions and 2 deletions
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5
lib/nvmf/rdma.c
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@ -53,6 +53,7 @@
#include "spdk/string.h" #include "spdk/string.h"
#include "spdk/trace.h" #include "spdk/trace.h"
#include "spdk/util.h" #include "spdk/util.h"
#include "spdk/likely.h"
#include "spdk_internal/log.h" #include "spdk_internal/log.h"
@ -895,11 +896,11 @@ spdk_nvmf_rdma_handle_pending_rdma_rw(struct spdk_nvmf_conn *conn)
/* Try to initiate RDMA Reads or Writes on requests that have data buffers */ /* Try to initiate RDMA Reads or Writes on requests that have data buffers */
while (rdma_conn->cur_rdma_rw_depth < rdma_conn->max_rw_depth) { while (rdma_conn->cur_rdma_rw_depth < rdma_conn->max_rw_depth) {
if (TAILQ_EMPTY(&rdma_conn->pending_rdma_rw_queue)) { rdma_req = TAILQ_FIRST(&rdma_conn->pending_rdma_rw_queue);
if (spdk_unlikely(!rdma_req)) {
break; break;
} }
rdma_req = TAILQ_FIRST(&rdma_conn->pending_rdma_rw_queue);
TAILQ_REMOVE(&rdma_conn->pending_rdma_rw_queue, rdma_req, link); TAILQ_REMOVE(&rdma_conn->pending_rdma_rw_queue, rdma_req, link);
SPDK_TRACELOG(SPDK_TRACE_RDMA, "Submitting previously queued for RDMA R/W request %p\n", rdma_req); SPDK_TRACELOG(SPDK_TRACE_RDMA, "Submitting previously queued for RDMA R/W request %p\n", rdma_req);