lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/serial/empeg.c
View File

@@ -478,12 +478,6 @@ static void empeg_set_termios(struct tty_struct *tty,
termios->c_cflag
|= CS8; /* character size 8 bits */
/*
* Force low_latency on; otherwise the pushes are scheduled;
* this is bad as it opens up the possibility of dropping bytes
* on the floor. We don't want to drop bytes on the floor. :)
*/
tty->low_latency = 1;
tty_encode_baud_rate(tty, 115200, 115200);
}