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[54.84.120.176]) by smtp-relay.gmail.com with ESMTPS id d2e1a72fcca58-8569f3a0fddsm819717b3a.2.2026.08.28.10.58.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Aug 2026 10:58:07 -0700 (PDT) X-Relaying-Domain: arista.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arista.com; s=Arista-A; t=1787939886; bh=l0MYRmzZFgruXC9r5HawEJJIBHGX1MwpvzJV/6xzk4w=; h=From:To:Cc:Subject:Date:From; b=eG3uKZyGSmNj9bVPNEHDYUwq/K0u4ADVlFzeN4WPO1k9I/lLghRacGWe1L/Etr8pz nBkn2qno+nx4WvXkQCR5mbEV4beP9Af9PXvhm6AnIELIZCMnWnrFbtO/kRkzmaBE06 Afv1SnDjTRR010IvekfwbEOjZTKCOi937V/sVYK4lZ1OVNsmDsy22nWM2Y7uUizLcX VaTpNxzBwxUqNwySjrnmCKsEHIBDuWUJj1P01AKmHw7QCtB2AcfGEN94y3iM8ct64J RYOKOvLKvnJejeZL124FpDpwysBXP5D4u0xIn3FSfE/wjv0YF542g/xbRQhC6A/m+v y6zrgzwzaVc5Q== Received: from vm-whiteberg-ubuntu.aristanetworks.com (dhcp-244-90-77.sjc.aristanetworks.com [10.244.90.77]) by smtp.aristanetworks.com (Postfix) with ESMTPS id 5A5A9C0CE5; Fri, 28 Aug 2026 17:58:05 +0000 (UTC) X-SMTP-Authentication: Allow-List-permitted X-SMTP-Authentication: Allow-List-permitted From: Tate Whiteberg To: Andy Shevchenko Cc: Tate Whiteberg , Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v2 0/2] serial: 8250_mid: fix race condition between output flush and termios update Date: Fri, 28 Aug 2026 17:57:26 +0000 Message-ID: <20260828175733.1650267-1-whiteberg@arista.com> Content-Transfer-Encoding: 8bit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Fix a race condition in which setting termios while still transmitting can corrupt transmission. Changes in v2: Split original patch into two: a prerequisite to to expose wait_for_xmitr() and a successor to fix the bug. Tate Whiteberg (2): serial: 8250: export and rename wait_for_xmitr() serial: 8250_mid: wait for LSR tx empty before setting termios drivers/tty/serial/8250/8250.h | 1 + drivers/tty/serial/8250/8250_mid.c | 7 +++++++ drivers/tty/serial/8250/8250_port.c | 13 +++++++------ 3 files changed, 15 insertions(+), 6 deletions(-) -- 2.43.0