diff options
| -rw-r--r-- | src/sys/os/os_iotap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/sys/os/os_iotap.c b/src/sys/os/os_iotap.c index 238acfe..54d1157 100644 --- a/src/sys/os/os_iotap.c +++ b/src/sys/os/os_iotap.c @@ -130,6 +130,9 @@ iotap_mux(const char *name, struct iotap_msg *msg) ops = desc.ops; switch (msg->opcode) { case IOTAP_OPC_READ: + if (ops->read == NULL) { + return -ENOTSUP; + } return ops->read(&desc, msg->buf, msg->len); } |