| From 72ad6d3c5d84c98203676d587b25898690591ab7 Mon Sep 17 00:00:00 2001 |
| From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Date: Mon, 26 Sep 2011 09:14:34 -0400 |
| Subject: 8250: ratelimit LSR safety check engaged warning. |
| |
| On my BIOSTAR TA890FXE the ttyS0 ends up spewing: |
| |
| [904682.485933] ttyS0: LSR safety check engaged! |
| [904692.505895] ttyS0: LSR safety check engaged! |
| [904702.525972] ttyS0: LSR safety check engaged! |
| [904712.545967] ttyS0: LSR safety check engaged! |
| [904722.566125] ttyS0: LSR safety check engaged! |
| .. |
| lets limit it so it won't be the only thing visible |
| in the ring buffer. |
| |
| CC: Alan Cox <alan@linux.intel.com> |
| Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| (cherry picked from commit 7808a4c4853fa0203085cf2217e01823d9f0c70c) |
| |
| Signed-off-by: Simon Horman <horms@verge.net.au> |
| --- |
| drivers/tty/serial/8250.c | 4 ++-- |
| 1 file changed, 2 insertions(+), 2 deletions(-) |
| |
| diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c |
| index 69802bd..eeadf1b 100644 |
| --- a/drivers/tty/serial/8250.c |
| +++ b/drivers/tty/serial/8250.c |
| @@ -2034,8 +2034,8 @@ static int serial8250_startup(struct uart_port *port) |
| */ |
| if (!(up->port.flags & UPF_BUGGY_UART) && |
| (serial_inp(up, UART_LSR) == 0xff)) { |
| - printk(KERN_INFO "ttyS%d: LSR safety check engaged!\n", |
| - serial_index(&up->port)); |
| + printk_ratelimited(KERN_INFO "ttyS%d: LSR safety check engaged!\n", |
| + serial_index(&up->port)); |
| return -ENODEV; |
| } |
| |
| -- |
| 1.7.10.1.362.g242cab3 |
| |
