From: Olaf Hering <olh@suse.de>
To: linux-kernel@vger.kernel.org, Sachin Sant <sachinp@in.ibm.com>
Subject: Re: [RFC] [PATCH] Adding ctrl-o sysrq hack support to 8250 driver
Date: Thu, 8 Dec 2005 15:58:21 +0100 [thread overview]
Message-ID: <20051208145821.GA15169@suse.de> (raw)
In-Reply-To: <20051207233911.GP6793@flint.arm.linux.org.uk>
On Wed, Dec 07, Russell King wrote:
> Easily. Have a look at the internals of uart_handle_break() in
> include/linux/serial_core.h
This one works for me, tested with 2.6.5.
drivers/serial/8250.c | 7 +++++++
1 files changed, 7 insertions(+)
Index: linux-2.6.15-rc5-olh/drivers/serial/8250.c
===================================================================
--- linux-2.6.15-rc5-olh.orig/drivers/serial/8250.c
+++ linux-2.6.15-rc5-olh/drivers/serial/8250.c
@@ -1154,6 +1154,13 @@ receive_chars(struct uart_8250_port *up,
*/
}
ch = serial_inp(up, UART_RX);
+
+#if defined(CONFIG_MAGIC_SYSRQ) && defined(CONFIG_SERIAL_CORE_CONSOLE)
+ /* Handle the SysRq ^O Hack, but only on the system console */
+ if (ch == '\x0f' && uart_handle_break(&up->port))
+ goto ignore_char;
+#endif
+
flag = TTY_NORMAL;
up->port.icount.rx++;
--
short story of a lazy sysadmin:
alias appserv=wotan
next prev parent reply other threads:[~2005-12-08 14:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-30 11:17 [RFC] [PATCH] Adding ctrl-o sysrq hack support to 8250 driver Sachin Sant
2005-11-30 12:12 ` Arjan van de Ven
2005-11-30 13:04 ` Russell King
2005-12-06 6:48 ` Sachin Sant
2005-12-06 17:16 ` Russell King
2005-12-07 6:31 ` Sachin Sant
2005-12-07 22:22 ` Olaf Hering
2005-12-07 23:39 ` Russell King
2005-12-08 14:58 ` Olaf Hering [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-12-08 1:38 Milton Miller
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