From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6ECC0200A6 for ; Fri, 21 Jul 2023 19:05:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5C7DC433C8; Fri, 21 Jul 2023 19:05:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689966321; bh=qPvkwsL36nViMQZiW77gnKcJ2+2PJE6sORggEDlNmgI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wJ9ky4l/H0JKKaK4BlC7nM+7C8kUU9Wr1DYiLjJ5CGfgbIgsO8x13OV4f3TbiZ8j8 j4ZyYUxVYknUIqTydzoLboJi4XVpF7Y0opJP2oZ7Kv6p8WOrNo6faIIz96xE9DuLRA tGc8c/UnP34SGIjzvi8xWBaV7+qUNiorzMDzOlLU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, John Ogness , Tony Lindgren , Sasha Levin Subject: [PATCH 5.15 285/532] serial: 8250: lock port for stop_rx() in omap8250_irq() Date: Fri, 21 Jul 2023 18:03:09 +0200 Message-ID: <20230721160629.882176826@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160614.695323302@linuxfoundation.org> References: <20230721160614.695323302@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: John Ogness [ Upstream commit ca73a892c5bec4b08a2fa22b3015e98ed905abb7 ] The uarts_ops stop_rx() callback expects that the port->lock is taken and interrupts are disabled. Fixes: 1fe0e1fa3209 ("serial: 8250_omap: Handle optional overrun-throttle-ms property") Signed-off-by: John Ogness Reviewed-by: Tony Lindgren Link: https://lore.kernel.org/r/20230525093159.223817-4-john.ogness@linutronix.de Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/8250/8250_omap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 6fa0e3ca469a0..28e243312286f 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -655,7 +655,9 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id) up->ier = port->serial_in(port, UART_IER); if (up->ier & (UART_IER_RLSI | UART_IER_RDI)) { + spin_lock(&port->lock); port->ops->stop_rx(port); + spin_unlock(&port->lock); } else { /* Keep restarting the timer until * the input overrun subsides. -- 2.39.2