| Message ID | 20210519092006.9775-2-johan@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | USB: serial: buffer-callback clean ups | expand |
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index 19ee8191647c..a4194b70a6fe 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1048,8 +1048,7 @@ static unsigned int digi_chars_in_buffer(struct tty_struct *tty) if (priv->dp_write_urb_in_use) { dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", priv->dp_port_num, port->bulk_out_size - 2); - /* return(port->bulk_out_size - 2); */ - return 256; + return port->bulk_out_size - 2; } else { dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", priv->dp_port_num, priv->dp_out_buf_len);
Due to an ancient quirk in n_tty poll implementation, the digi_acceleport driver has been reporting that its queue contains 256 (WAKEUP_CHARS) characters whenever its write URB is in use. This has not been necessary since 2003 when the line-discipline started taking the write room into account so let's return the maximum transfer size again in order to over-report a little less and incidentally fix the related debug statement. Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/usb/serial/digi_acceleport.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)