From: Alon Ziv Date: Sun, 10 Oct 2010 06:32:18 +0000 (+0200) Subject: USB: opticon: Fix long-standing bugs in opticon driver X-Git-Tag: firefly_0821_release~10186^2~757 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b7562261f479efd9b821885fdbed4646d11459f9;p=firefly-linux-kernel-4.4.55.git USB: opticon: Fix long-standing bugs in opticon driver commit 97cd8dc4ca9a1a5efb2cc38758e01492e3b013e2 upstream. The bulk-read callback had two bugs: a) The bulk-in packet's leading two zeros were returned (and the two last bytes truncated) b) The wrong URB was transmitted for the second (and later) read requests, causing further reads to return the entire packet (including leading zeros) Signed-off-by: Alon Ziv Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index 80f59b6350cb..db7cf0866046 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -99,8 +99,8 @@ static void opticon_bulk_callback(struct urb *urb) available_room = tty_buffer_request_room(tty, data_length); if (available_room) { - tty_insert_flip_string(tty, data, - available_room); + tty_insert_flip_string(tty, data + 2, + data_length); tty_flip_buffer_push(tty); } tty_kref_put(tty); @@ -134,7 +134,7 @@ exit: priv->bulk_address), priv->bulk_in_buffer, priv->buffer_size, opticon_bulk_callback, priv); - result = usb_submit_urb(port->read_urb, GFP_ATOMIC); + result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); if (result) dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n",