Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Alex Elder <elder@linaro.org>
To:     davem@davemloft.net, kuba@kernel.org
Cc:     bjorn.andersson@linaro.org, mka@chromium.org, evgreen@chromium.org,
        cpratapa@codeaurora.org, avuyyuru@codeaurora.org,
        jponduru@codeaurora.org, subashab@codeaurora.org, elder@kernel.org,
        netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH net-next 09/10] net: ipa: replenish after delivering payload
Date:   Thu,  3 Feb 2022 11:09:26 -0600
Message-Id: <20220203170927.770572-10-elder@linaro.org>
In-Reply-To: <20220203170927.770572-1-elder@linaro.org>
References: <20220203170927.770572-1-elder@linaro.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Replenishing is now solely driven by whether transactions are
available for a channel, and it doesn't really matter whether
we replenish before or after we deliver received packets to the
network stack.

Replenishing before delivering the payload adds a little latency.
Eliminate that by requesting a replenish after the payload is
delivered.

Signed-off-by: Alex Elder <elder@linaro.org>
---
 drivers/net/ipa/ipa_endpoint.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 9d875126a360e..a236edf5bf068 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1341,10 +1341,8 @@ static void ipa_endpoint_rx_complete(struct ipa_endpoint *endpoint,
 {
 	struct page *page;
 
-	ipa_endpoint_replenish(endpoint);
-
 	if (trans->cancelled)
-		return;
+		goto done;
 
 	/* Parse or build a socket buffer using the actual received length */
 	page = trans->data;
@@ -1352,6 +1350,8 @@ static void ipa_endpoint_rx_complete(struct ipa_endpoint *endpoint,
 		ipa_endpoint_status_parse(endpoint, page, trans->len);
 	else if (ipa_endpoint_skb_build(endpoint, page, trans->len))
 		trans->data = NULL;	/* Pages have been consumed */
+done:
+	ipa_endpoint_replenish(endpoint);
 }
 
 void ipa_endpoint_trans_complete(struct ipa_endpoint *endpoint,
-- 
2.32.0