diff options
| -rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index 97a068dff192..3bb954997ebc 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -56,6 +56,17 @@ static int send_command(struct cros_ec_device *ec_dev, else xfer_fxn = ec_dev->cmd_xfer; + if (!xfer_fxn) { + /* + * This error can happen if a communication error happened and + * the EC is trying to use protocol v2, on an underlying + * communication mechanism that does not support v2. + */ + dev_err_once(ec_dev->dev, + "missing EC transfer API, cannot send command\n"); + return -EIO; + } + ret = (*xfer_fxn)(ec_dev, msg); if (msg->result == EC_RES_IN_PROGRESS) { int i; |