linux-kernel - [PATCH 3.12 100/155] ARC: [nsimosci] Allow "headless" models to boot

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Message-Id: <abde217befa12c4330081acdf9060ea51a8fb515.1428411004.git.jslaby@suse.cz>
Date:	Tue,  7 Apr 2015 14:51:09 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Vineet Gupta <vgupta@...opsys.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 100/155] ARC: [nsimosci] Allow "headless" models to boot

From: Vineet Gupta <vgupta@...opsys.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 5c05483e2db91890faa9a7be0a831701a3f442d6 upstream.

There are certain test configuration of virtual platform which don't
have any real console device (uart/pgu). So add tty0 as a fallback console
device to allow system to boot and be accessible via telnet

Otherwise with ttyS0 as only console, but 8250 disabled in kernel build,
init chokes.

Reported-by: Anton Kolesov <akolesov@...opsys.com>
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Cc: <stable@...r.kernel.org> #3.10, 3.12, 3.14, 3.16
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arc/boot/dts/nsimosci.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/boot/dts/nsimosci.dts b/arch/arc/boot/dts/nsimosci.dts
index 4f31b2eb5cdf..398064cef746 100644
--- a/arch/arc/boot/dts/nsimosci.dts
+++ b/arch/arc/boot/dts/nsimosci.dts
@@ -20,7 +20,7 @@
 		/* this is for console on PGU */
 		/* bootargs = "console=tty0 consoleblank=0"; */
 		/* this is for console on serial */
-		bootargs = "earlycon=uart8250,mmio32,0xc0000000,115200n8 console=ttyS0,115200n8 consoleblank=0 debug";
+		bootargs = "earlycon=uart8250,mmio32,0xc0000000,115200n8 console=tty0 console=ttyS0,115200n8 consoleblank=0 debug";
 	};
 
 	aliases {
-- 
2.3.4

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