From: Bjorn Andersson <bjorn.andersson@linaro.org>
Date: Fri, 2 Dec 2016 00:59:55 +0000 (-0800)
Subject: rpmsg: qcom_smd: Correct return value for O_NONBLOCK
X-Git-Tag: v4.9.3~72
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=17df3e74fb5174bc9fc078fd640dc3b2762f0ca1;p=platform%2Fkernel%2Flinux-amlogic.git

rpmsg: qcom_smd: Correct return value for O_NONBLOCK

commit 1d74e7ed5dc1903ac081574a9b6aa94e7ba4ad45 upstream.

qcom_smd_send() should return -EAGAIN for non-blocking channels with
insufficient space, so that we can propagate this event to user space.

Fixes: 53e2822e56c7 ("rpmsg: Introduce Qualcomm SMD backend")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 06fef2b4c814..1d4770c02e57 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -739,7 +739,7 @@ static int __qcom_smd_send(struct qcom_smd_channel *channel, const void *data,
 
 	while (qcom_smd_get_tx_avail(channel) < tlen) {
 		if (!wait) {
-			ret = -ENOMEM;
+			ret = -EAGAIN;
 			goto out;
 		}