linux-kernel - [tip:x86/urgent] x86, setup: Fix earlyprintk=serial,ttyS0,115200

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Date:	Tue, 21 Sep 2010 19:58:06 GMT
From:	tip-bot for Yinghai Lu <yinghai@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	just.for.lkml@...glemail.com, yinghai@...nel.org,
	tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/urgent] x86, setup: Fix earlyprintk=serial,ttyS0,115200

Commit-ID:  83d9f65bdae6f6b34d75282c6618d3f50846849a
Gitweb:     http://git.kernel.org/tip/83d9f65bdae6f6b34d75282c6618d3f50846849a
Author:     Yinghai Lu <yinghai@...nel.org>
AuthorDate: Sun, 29 Aug 2010 18:12:24 -0700
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Tue, 21 Sep 2010 10:18:14 -0700

x86, setup: Fix earlyprintk=serial,ttyS0,115200

Torsten reported that there is garbage output,
after commit 8fee13a48e4879fba57725f6d9513df4bfa8e9f3 (x86,
setup: enable early console output from the decompressor)

It turns out we missed the offset for that case.

Reported-by: Torsten Kaiser <just.for.lkml@...glemail.com>
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
LKML-Reference: <4C7B0578.8090807@...nel.org>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/boot/early_serial_console.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/boot/early_serial_console.c b/arch/x86/boot/early_serial_console.c
index 030f4b9..407a8e2 100644
--- a/arch/x86/boot/early_serial_console.c
+++ b/arch/x86/boot/early_serial_console.c
@@ -58,7 +58,7 @@ static void parse_earlyprintk(void)
 		if (arg[pos] == ',')
 			pos++;
 
-		if (!strncmp(arg, "ttyS", 4)) {
+		if (!strncmp(arg + pos, "ttyS", 4)) {
 			static const int bases[] = { 0x3f8, 0x2f8 };
 			int idx = 0;
 
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