rpmsg: qcom_smd: Correct return value for O_NONBLOCK

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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 92efa74a0024..d003aa832f22 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;
                 }