linux-kernel - [PATCH] serial: pch_uart: fix sysrq handling for pch

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Date:	Thu, 24 Jan 2013 12:31:27 +0800
From:	Liang Li <liang.li@...driver.com>
To:	<gregkh@...uxfoundation.org>, <linux-serial@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC:	<liang.li@...driver.com>, <sfr@...b.auug.org.au>,
	<rdunlap@...radead.org>, <linux-next@...r.kernel.org>
Subject: [PATCH] serial: pch_uart: fix sysrq handling for pch_uart

When PCH_UART_CONSOLE and SERIAL_CORE_CONSOLE is not set neither, the
uart_port will have no 'sysrq' member hence their will need a '#ifdef'
in pch_uart.c to handle the case, otherwise we'll see compile error
like this:

  CC [M]  drivers/tty/serial/pch_uart.o
drivers/tty/serial/pch_uart.c: In function 'pch_uart_hal_read':
drivers/tty/serial/pch_uart.c:572:11: error: 'struct uart_port' has no member named 'sysrq'
make[4]: *** [drivers/tty/serial/pch_uart.o] Error 1

Reported-by: Randy Dunlap <rdunlap@...radead.org>
CC: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Liang Li <liang.li@...driver.com>
---
Hi Greg,

This is for 'tty-next' of your tty tree. Thanks.

 drivers/tty/serial/pch_uart.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 1ddfc66..7a6c989 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -569,10 +569,12 @@ static int pch_uart_hal_read(struct eg20t_port *priv, unsigned char *buf,
 			if (uart_handle_break(port))
 				continue;
 		}
+#ifdef SUPPORT_SYSRQ
 		if (port->sysrq) {
 			if (uart_handle_sysrq_char(port, rbr))
 				continue;
 		}
+#endif
 
 		buf[i++] = rbr;
 	}
-- 
1.7.11.4

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