mailbox: handle empty message in tx_tick
We already check if the message is empty before calling the client
tx_done callback. Calling completion on a wait event is also invalid
if the message is empty.
This patch moves the existing empty message check earlier.
Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 49e5dad..9dfbf7e 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -103,8 +103,11 @@ static void tx_tick(struct mbox_chan *chan, int r)
/* Submit next message */
msg_submit(chan);
+ if (!mssg)
+ return;
+
/* Notify the client */
- if (mssg && chan->cl->tx_done)
+ if (chan->cl->tx_done)
chan->cl->tx_done(chan->cl, mssg, r);
if (r != -ETIME && chan->cl->tx_block)