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 C2F968F74 for ; Sun, 16 Jul 2023 20:22:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46BFAC433C8; Sun, 16 Jul 2023 20:22:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689538926; bh=0j0gljsKBs+ec3Yf/2gB8d1DPYOoteFiYAAErf6yQDM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AlphU+RK9/AwdttQq3lQX5EJrnjrLTz4uQZAnN0Z2yWhoXbuFX4X4hGu9rLbx1dj0 LsCp2RvnbFta/an8l81ChDlt9mpJ+DtonDkeZbfYhaU/rZzMtMMS6JoNKH8zKbgPTl sZO5rLeAkKr4K72VFxIhdInkqwqD+kTBsOWvoorA= 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 6.4 596/800] serial: 8250: lock port for stop_rx() in omap8250_irq() Date: Sun, 16 Jul 2023 21:47:29 +0200 Message-ID: <20230716195002.945902780@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@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 05dc568bd3898..05704d8c56566 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -651,7 +651,9 @@ 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