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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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6
drivers/usb/serial/generic.c
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@@ -122,12 +122,6 @@ int usb_serial_generic_open(struct tty_struct *tty,
dbg("%s - port %d", __func__, port->number);
/* 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;
/* clear the throttle flags */
spin_lock_irqsave(&port->lock, flags);
port->throttled = 0;