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>

diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 92efa74..d003aa8 100644 (file)
--- 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;
                }