From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61254476072 for ; Mon, 5 Oct 2026 10:32:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791196330; cv=none; b=Ylt5NT5cBPDZVCncklYLxUe8HnVZNVIOfFLuVOoJTtMXNbI5U1aVQtJ9ugDQxMGz5lPSdNkf2RGsSmHHGCuNkQt/sk8jgCe3h0n+5SVZYqn5SLTp/a1dvpha4kFnIXchdFqnojPMKfSM0s121mFQJo40Jqgb9Dxn/rJ89mPLXpQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791196330; c=relaxed/simple; bh=fQ11LdiK07+mEHXr1GMh6wqoPQtrJV9G7AGjEPc0b4A=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=QqDcX1QjFmwPSMWRHyFTYPVgFtrPIZUu9DGGEbRIuMLb33KyBaViWy2yekNPVg8snH30nrORJaWledru4+/Cmpw1+zHS7ZmUjdPOWyToV8b9jOAg/ROubyvZTpeJ3RQuYUB+zJq0Uz3Bam/E8J5FYfQURoBpVtZ+aOp8g6VT1H0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QPqqks39; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QPqqks39" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 530041F000FF; Mon, 5 Oct 2026 10:32:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1791196328; bh=p6DHTJU2LExa7JwUntiJDw4w2BL+k4A+vygcEiOj50o=; h=Subject:To:Cc:From:Date; b=QPqqks394S/hsQwS3IJQXe5FAi5xQSR4uvfFA6nOe2312sfoLGp134kp5cSGhLopW JlOUGK7lV47aeRRohfPwv8Fz4SlODCVeygABGIyUvK8U1jPcb27XQE7amkv4ZLPjgv u9SM9YVulLi3isGVW7mg+jDjcGf4Rd3HlkTZD138= Subject: FAILED: patch "[PATCH] serial: abort TIOCMIWAIT on hangup" failed to apply to 6.6-stable tree To: johan@kernel.org,gregkh@linuxfoundation.org Cc: From: Date: Mon, 05 Oct 2026 12:31:57 +0200 Message-ID: <2026100557-streak-emcee-4218@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-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 . 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-6.6.y git checkout FETCH_HEAD git cherry-pick -x eb35b73e133686e5b999eb7130c4e3d22fe03089 # git commit -s git send-email --to '' --in-reply-to '2026100557-streak-emcee-4218@gregkh' --subject-prefix 'PATCH 6.6.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 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. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: sashiko-bot@kernel.org Link: https://lore.kernel.org/r/20260904115542.E20D11F00A3D@smtp.kernel.org Cc: stable@kernel.org Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20260910130816.642699-5-johan@kernel.org Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index f7b30f77b231..33c8f3b6ac81 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -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 */