linux-kernel - [PATCH] KGDB-8250: fix initial interrupt

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Date:	Thu, 07 Feb 2008 08:38:36 +0100
From:	Jan Kiszka <jan.kiszka@....de>
To:	Jason Wessel <jason.wessel@...driver.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	kgdb-bugreport@...ts.sourceforge.net
Subject: [PATCH] KGDB-8250: fix initial interrupt

Latest rework of kgdb8250_interrupt caused a regression in that the new
code wrongly assumes a ctrl-c character is also sent on initial connect
from the host. Here is a fix.

Signed-off-by: Jan Kiszka <jan.kiszka@....de>

---
 drivers/serial/8250_kgdb.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: b/drivers/serial/8250_kgdb.c
===================================================================
--- a/drivers/serial/8250_kgdb.c
+++ b/drivers/serial/8250_kgdb.c
@@ -124,10 +124,10 @@ static irqreturn_t kgdb8250_interrupt(in

 	if ((iir & UART_IIR_ID) == UART_IIR_RDI) {
 		c = kgdb8250_ioread(UART_RX);
-		if (c == 0x03)
-			breakpoint();
-		else
+		if (c != 0x03)
 			buffered_char = c;
+		if (c == 0x03 || !kgdb_connected)
+			breakpoint();
 	}
 	return IRQ_HANDLED;
 }
--
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