commit 262ccbb0683fc0a3f704b4f66ee3feb54796823f
author Bowen Wang <wangbowen6@xiaomi.com> Sat Sep 07 18:51:04 2024 +0800
committer GUIDINGLI <49524062+GUIDINGLI@users.noreply.github.com> Mon Oct 07 20:42:44 2024 +0800
tree 1cca1bc7c5ce4d0beca726bf2483ea6cc26b4502
parent a1dc6dc7fc496c04fc5793dd2233965cb928c984

drivers/uart_rpmsg: add recv lock when received the data from peer

The recv buffer is used both in user thread and rpmsg ept->callback
thread, so add recv lock to protect the recv buffer.

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>

drivers/serial/uart_rpmsg.c

diff --git a/drivers/serial/uart_rpmsg.c b/drivers/serial/uart_rpmsg.c
index a312848..303ebf8 100644
--- a/drivers/serial/uart_rpmsg.c
+++ b/drivers/serial/uart_rpmsg.c
@@ -384,9 +384,11 @@
     {
       /* Get write-cmd, there are some data, we need receive them */
 
+      nxmutex_lock(&dev->recv.lock);
       priv->recv_data = data;
       uart_recvchars_dma(dev);
       priv->recv_data = NULL;
+      nxmutex_unlock(&dev->recv.lock);
 
       header->response = 1;
       rpmsg_send(ept, msg, sizeof(*msg));