Commit 7808a4c4 authored Sep 26, 2011 by Konrad Rzeszutek Wilk Committed by Greg Kroah-Hartman Sep 26, 2011

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>

parent cf16807b

drivers/tty/serial/8250.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -2055,7 +2055,7 @@ 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",
		printk_ratelimited(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
		serial_index(&up->port));
		return -ENODEV;
		}