diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serdev/core.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index c7d637d2bc56..ee4c40336633 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -234,6 +234,7 @@ int serdev_device_write(struct serdev_device *serdev, unsigned long timeout) { struct serdev_controller *ctrl = serdev->ctrl; + int written = 0; int ret; if (!ctrl || !ctrl->ops->write_buf || !serdev->ops->write_wakeup) @@ -250,14 +251,21 @@ int serdev_device_write(struct serdev_device *serdev, if (ret < 0) break; + written += ret; buf += ret; count -= ret; - } while (count && (timeout = wait_for_completion_timeout(&serdev->write_comp, timeout))); mutex_unlock(&serdev->write_lock); - return ret < 0 ? ret : (count ? -ETIMEDOUT : 0); + + if (ret < 0) + return ret; + + if (timeout == 0 && written == 0) + return -ETIMEDOUT; + + return written; } EXPORT_SYMBOL_GPL(serdev_device_write); |