From: John Ogness <john.ogness@linutronix.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Petr Mladek" <pmladek@suse.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, "Jiri Slaby" <jirislaby@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Tony Lindgren" <tony@atomide.com>,
"Lukas Wunner" <lukas@wunner.de>,
"Matthias Schiffer" <matthias.schiffer@ew.tq-group.com>,
linux-serial@vger.kernel.org
Subject: [PATCH tty v1 3/8] serial: 8250: lock port for stop_rx() in omap8250_irq()
Date: Thu, 25 May 2023 11:37:54 +0206 [thread overview]
Message-ID: <20230525093159.223817-4-john.ogness@linutronix.de> (raw)
In-Reply-To: <20230525093159.223817-1-john.ogness@linutronix.de>
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 <john.ogness@linutronix.de>
---
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 fbca0692aa51..c17d98161d5e 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -658,7 +658,9 @@ 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.
--
2.30.2
next prev parent reply other threads:[~2023-05-25 9:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-25 9:31 [PATCH tty v1 0/8] synchronize UART_IER access against console write John Ogness
2023-05-25 9:31 ` [PATCH tty v1 1/8] serial: 8250: lock port in startup() callbacks John Ogness
2023-05-25 9:31 ` [PATCH tty v1 2/8] serial: core: lock port for stop_rx() in uart_suspend_port() John Ogness
2023-05-25 17:47 ` Vijaya Krishna Nivarthi (Temp) (QUIC)
2023-05-25 20:37 ` Doug Anderson
2023-05-25 9:31 ` John Ogness [this message]
2023-05-26 9:00 ` [PATCH tty v1 3/8] serial: 8250: lock port for stop_rx() in omap8250_irq() Tony Lindgren
2023-05-25 9:31 ` [PATCH tty v1 4/8] serial: core: lock port for start_rx() in uart_resume_port() John Ogness
2023-05-25 16:07 ` Doug Anderson
2023-05-25 20:38 ` Doug Anderson
2023-05-26 8:09 ` John Ogness
2023-05-25 9:31 ` [PATCH tty v1 5/8] serial: 8250: lock port for rx_dma() callback John Ogness
2023-05-25 9:31 ` [PATCH tty v1 6/8] serial: 8250: lock port for omap8250_restore_regs() John Ogness
2023-05-25 9:31 ` [PATCH tty v1 7/8] serial: 8250: lock port for UART_IER access in omap8250_irq() John Ogness
2023-05-26 9:01 ` Tony Lindgren
2023-05-25 9:31 ` [PATCH tty v1 8/8] serial: 8250: synchronize and annotate UART_IER access John Ogness
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