From 4ddecf76b5aebb5db4a771ca52c18135291235e3 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 25 Jan 2017 18:02:49 +0100 Subject: [PATCH] USB: cdc-acm: fix TIOCGSERIAL flags The driver reports that it always uses a low-latency mode by returning the ASYNC_LOW_LATENCY flag through TIOCGSERIAL. Even if this behaviour could not be changed, this may have made some sense prior to 7a9a65ced11e ("cdc-acm: Fix long standing abuse of tty->low_latency") which removed the unconditional setting of the corresponding tty low_latency flag (something which had always been broken in itself). Since the driver does not have a low-latency mode, let's drop the flag. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index e35b1508d3eb..235e305f8473 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -913,7 +913,6 @@ static int get_serial_info(struct acm *acm, struct serial_struct __user *info) struct serial_struct tmp; memset(&tmp, 0, sizeof(tmp)); - tmp.flags = ASYNC_LOW_LATENCY; tmp.xmit_fifo_size = acm->writesize; tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); tmp.close_delay = acm->port.close_delay / 10; -- 2.20.1