tty: don't check for signal_pending() in send_break()

[ Upstream commit fd99392b643b824813df2edbaebe26a2136d31e6 ]

msleep_interruptible() will check on its own. So no need to do the check
in send_break() before calling the above.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230919085156.1578-15-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 66aad7d8d3ec ("usb: cdc-acm: return correct error code on unsupported break")
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/tty/tty_io.c

@@ -2513,7 +2513,6 @@ static int send_break(struct tty_struct *tty, unsigned int duration)
 	retval = tty->ops->break_ctl(tty, -1);
 	if (retval)
 		goto out;
-	if (!signal_pending(current))
 	msleep_interruptible(duration);
 	retval = tty->ops->break_ctl(tty, 0);
 out: