linux-kernel - [PATCH 1/2] rpmsg: glink: Propagate TX failures in intentless mode as well

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Message-ID: <20230327144153.3133425-2-quic_bjorande@quicinc.com>
Date:   Mon, 27 Mar 2023 07:41:52 -0700
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Chris Lew <quic_clew@...cinc.com>
CC:     <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] rpmsg: glink: Propagate TX failures in intentless mode as well

As support for splitting transmision over several messages using
TX_DATA_CONT was introduced it does not immediately return the return
value of qcom_glink_tx().

The result is that in the intentless case (i.e. intent == NULL), the
code will continue to send all additional chunks. This is wasteful, and
it's possible that the send operation could incorrectly indicate
success, if the last chunk fits in the TX fifo.

Fix the condition.

Fixes: 8956927faed3 ("rpmsg: glink: Add TX_DATA_CONT command while sending")
Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
 drivers/rpmsg/qcom_glink_native.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 01d2805fe30f..62634d020d13 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1356,8 +1356,9 @@ static int __qcom_glink_send(struct glink_channel *channel,
 	ret = qcom_glink_tx(glink, &req, sizeof(req), data, chunk_size, wait);
 
 	/* Mark intent available if we failed */
-	if (ret && intent) {
-		intent->in_use = false;
+	if (ret) {
+		if (intent)
+			intent->in_use = false;
 		return ret;
 	}
 
@@ -1378,8 +1379,9 @@ static int __qcom_glink_send(struct glink_channel *channel,
 				    chunk_size, wait);
 
 		/* Mark intent available if we failed */
-		if (ret && intent) {
-			intent->in_use = false;
+		if (ret) {
+			if (intent)
+				intent->in_use = false;
 			break;
 		}
 	}
-- 
2.25.1