[PATCH 4/5] rpmsg: smd: Fail send on a closed channel

[Bjorn Andersson]

Move the check for a closed channel out from the tx-full loop to fail
any send request on a non-open channel.

Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
---
 drivers/rpmsg/qcom_smd.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 0993e95bf0f5..ed167ab52a68 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -743,17 +743,13 @@ static int __qcom_smd_send(struct qcom_smd_channel 
*channel, const void *data,
        if (ret)
                return ret;
 
-       while (qcom_smd_get_tx_avail(channel) < tlen) {
+       while (qcom_smd_get_tx_avail(channel) < tlen &&
+              channel->state == SMD_CHANNEL_OPENED) {
                if (!wait) {
                        ret = -EAGAIN;
                        goto out;
                }
 
-               if (channel->state != SMD_CHANNEL_OPENED) {
-                       ret = -EPIPE;
-                       goto out;
-               }
-
                SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 0);
 
                ret = wait_event_interruptible(channel->fblockread_event,
@@ -765,6 +761,12 @@ static int __qcom_smd_send(struct qcom_smd_channel 
*channel, const void *data,
                SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
        }
 
+       /* Fail if the channel was closed */
+       if (channel->state != SMD_CHANNEL_OPENED) {
+               ret = -EPIPE;
+               goto out;
+       }
+
        SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
 
        qcom_smd_write_fifo(channel, hdr, sizeof(hdr));
-- 
2.15.0