FAILED: patch "[PATCH] serial: abort TIOCMIWAIT on hangup" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x eb35b73e133686e5b999eb7130c4e3d22fe03089
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026100557-audacious-onscreen-604e@gregkh' --subject-prefix 'PATCH 6.1.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From eb35b73e133686e5b999eb7130c4e3d22fe03089 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Thu, 10 Sep 2026 15:08:16 +0200
Subject: [PATCH] serial: abort TIOCMIWAIT on hangup

Add the missing hangup check to the TIOCMIWAIT wait loop to avoid going back to sleep (indefinitely) after being woken on hangup.

index f7b30f77b231..33c8f3b6ac81 100644
@@ -1244,6 +1244,11 @@ static int uart_wait_modem_status(struct tty_struct *tty, struct uart_state *sta
 			break;
 		}
 
+		if (tty_io_error(tty)) {
+			ret = -EIO;
+			break;
+		}
+
 		schedule();
 
 		/* see if a signal did it */