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USB: removal of tty->low_latency hack dating back to the old serial code

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This removes tty->low_latency from all USB serial drivers that push
data into the tty layer at hard interrupt context. It's no longer needed
and actually harmful.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum
2009-04-20 17:28:53 +02:00
committed by Greg Kroah-Hartman
parent 212b8f0c3f
commit 2400a2bfbd
18 changed files with 1 additions and 111 deletions
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8
drivers/usb/serial/visor.c
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@@ -296,14 +296,6 @@ static int visor_open(struct tty_struct *tty, struct usb_serial_port *port,
priv->throttled = 0;
spin_unlock_irqrestore(&priv->lock, flags);
/*
* Force low_latency on so that our tty_push actually forces the data
* through, otherwise it is scheduled, and with high data rates (like
* with OHCI) data can get lost.
*/
if (tty)
tty->low_latency = 1;
/* Start reading from the device */
usb_fill_bulk_urb(port->read_urb, serial->dev,
usb_rcvbulkpipe(serial->dev,