linux-kernel - [PATCH v2 06/20] rpmsg: glink: Return -EAGAIN when there is no FIFO space

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Message-Id: <1503559302-3744-7-git-send-email-sricharan@codeaurora.org>
Date:   Thu, 24 Aug 2017 12:51:28 +0530
From:   Sricharan R <sricharan@...eaurora.org>
To:     ohad@...ery.com, bjorn.andersson@...aro.org,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     sricharan@...eaurora.org
Subject: [PATCH v2 06/20] rpmsg: glink: Return -EAGAIN when there is no FIFO space

The TX FIFO can be full, if the remote client has
not read enough data (or) reading it slowly. So its
nessecary to return -EAGAIN to the local client to
enable retry.

Signed-off-by: Sricharan R <sricharan@...eaurora.org>
---
 drivers/rpmsg/qcom_glink_native.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index a6394cd..94b79e8 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -233,7 +233,7 @@ static int qcom_glink_tx(struct qcom_glink *glink,
 
 	while (qcom_glink_tx_avail(glink) < tlen) {
 		if (!wait) {
-			ret = -ENOMEM;
+			ret = -EAGAIN;
 			goto out;
 		}
 
-- 
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