lkml.org 
[lkml]   [2007]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectA question about break and sysrq on a serial console (2.6.19.1)
From
Date
I'm trying to do a SYSRQ over a serial console.  As I understand it a
break will do that, but I'm not seeing the SYSRQ. In looking at
uart_handle_break() in drivers/serial/8250.c it looks like the code will
toggle port->sysrq, rather than just setting it when the port is a
console. I think the correct code would be to move the "port->sysrq =
0;" to follow the closing brace on the next line, or am I missing
something.

--------------
/*
* We do the SysRQ and SAK checking like this...
*/
static inline int uart_handle_break(struct uart_port *port)
{
struct uart_info *info = port->info;
#ifdef SUPPORT_SYSRQ
if (port->cons && port->cons->index == port->line) {
if (!port->sysrq) {
port->sysrq = jiffies + HZ*5;
return 1;
}
port->sysrq = 0;
}
#endif
if (port->flags & UPF_SAK)
do_SAK(info->tty);
return 0;
}
-------------

It seem to me that this code will toggle port->sysrq.
--
Brian Beattie
Firmware Engineer
APCON, Inc.
BrianB@apcon.com

-
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/

\
 
 \ /
  Last update: 2007-01-18 01:53    [W:0.038 / U:0.164 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site