[PATCH 11/17] net/iavf: use previous value atomic fetch operations

[Tyler Retzlaff]

Use __atomic_fetch_{add,and,or,sub,xor} instead of
__atomic_{add,and,or,sub,xor}_fetch when we have no interest in the
result of the operation.

Reduces unnecessary codegen that provided the result of the atomic
operation that was not used.

Change brings closer alignment with atomics available in C11 standard
and will reduce review effort when they are integrated.

Signed-off-by: Tyler Retzlaff <roret...@linux.microsoft.com>
---
 drivers/net/iavf/iavf_vchnl.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c
index 9adaadb..73875d7 100644
--- a/drivers/net/iavf/iavf_vchnl.c
+++ b/drivers/net/iavf/iavf_vchnl.c
@@ -128,7 +128,7 @@ struct iavf_event_handler {
        int err = pipe(handler->fd);
 #endif
        if (err != 0) {
-               __atomic_sub_fetch(&handler->ndev, 1, __ATOMIC_RELAXED);
+               __atomic_fetch_sub(&handler->ndev, 1, __ATOMIC_RELAXED);
                return -1;
        }
 
@@ -137,7 +137,7 @@ struct iavf_event_handler {
 
        if (rte_ctrl_thread_create(&handler->tid, "iavf-event-thread",
                                NULL, iavf_dev_event_handle, NULL)) {
-               __atomic_sub_fetch(&handler->ndev, 1, __ATOMIC_RELAXED);
+               __atomic_fetch_sub(&handler->ndev, 1, __ATOMIC_RELAXED);
                return -1;
        }
 
@@ -533,7 +533,7 @@ struct iavf_event_handler {
                                /* read message and it's expected one */
                                if (msg_opc == vf->pend_cmd) {
                                        uint32_t cmd_count =
-                                       __atomic_sub_fetch(&vf->pend_cmd_count,
+                                       __atomic_fetch_sub(&vf->pend_cmd_count,
                                                        1, __ATOMIC_RELAXED);
                                        if (cmd_count == 0)
                                                _notify_cmd(vf, msg_ret);
-- 
1.8.3.1