[PATCH] serial: earlycon: Initialize uart_port spinlock

From	Bjorn Andersson <bjorn.andersson@sonymobile.com>
Newsgroups	linux.kernel
Subject	[PATCH] serial: earlycon: Initialize uart_port spinlock
Date	2015-12-11 02:10 +0100
Message-ID	<qEknE-5Bz-11@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Show all headers | View raw

Initialize the uart_port spinlock of earlycon to avoid the BUG() when
booting with spinlock debug enabled.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
 drivers/tty/serial/earlycon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index f09636083426..6c18891ad8d0 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -111,6 +111,8 @@ static int __init register_earlycon(char *buf, const struct earlycon_id *match)
 	int err;
 	struct uart_port *port = &early_console_dev.port;
 
+	spin_lock_init(&port->lock);
+
 	/* On parsing error, pass the options buf to the setup function */
 	if (buf && !parse_options(&early_console_dev, buf))
 		buf = NULL;
@@ -202,6 +204,7 @@ int __init of_setup_earlycon(unsigned long addr,
 	int err;
 	struct uart_port *port = &early_console_dev.port;
 
+	spin_lock_init(&port->lock);
 	port->iotype = UPIO_MEM;
 	port->mapbase = addr;
 	port->uartclk = BASE_BAUD * 16;
-- 
2.4.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH] serial: earlycon: Initialize uart_port spinlock Bjorn Andersson <bjorn.andersson@sonymobile.com> - 2015-12-11 02:10 +0100
  Re: [PATCH] serial: earlycon: Initialize uart_port spinlock Rob Herring <robh@kernel.org> - 2015-12-11 03:40 +0100
    Re: [PATCH] serial: earlycon: Initialize uart_port spinlock Bjorn Andersson <bjorn@kryo.se> - 2015-12-11 17:30 +0100

csiph-web