recvmsg() will incorrectly return 0 if the count of sema before waiting is greater than 0,
This commit will reinitialize the sema count before waiting:
1181 static ssize_t rpmsg_socket_recvmsg(FAR struct socket *psock,
1182 FAR struct msghdr *msg, int flags)
1183 {
...
1255 ret = net_sem_timedwait(&conn->recvsem,
1256 _SO_TIMEOUT(conn->sconn.s_rcvtimeo)); // recvsem.sem_count == 1; return 0
...
1264 if (!conn->recvdata) // recvdata not consumed; goto else
1265 {
1266 ret = conn->recvlen;
1267 }
1268 else
1269 {
1270 conn->recvdata = NULL;
1271 }
...
1282 return ret; // BUGON! incorrectly return 0 to user
1283 }
Signed-off-by: chao an <anchao@xiaomi.com>
36591af615