From 5a41940fa19445b2568a6256f1a4b3975ae7aa6e Mon Sep 17 00:00:00 2001
From: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Date: Tue, 19 Sep 2023 09:51:55 +0100
Subject: [PATCH] tty: don't check for signal_pending() in send_break()

References: bsc#1214683 (PREEMPT_RT prerequisite backports)
Patch-mainline: v6.6.14
Git-commit: fd99392b643b824813df2edbaebe26a2136d31e6

[ 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>
Signed-off-by: Mel Gorman <mgorman@suse.de>

---
 drivers/tty/tty_io.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 92d2da9256ef..db6dcc323a81 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2484,8 +2484,7 @@ 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);
+	msleep_interruptible(duration);
 	retval = tty->ops->break_ctl(tty, 0);
 out:
 	tty_write_unlock(tty);