linux-kernel - [PATCH v2 -next 10/13] serial: earlycon: Allow earlycon params with name only

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Message-Id: <1425225958-17908-11-git-send-email-peter@hurleysoftware.com>
Date:	Sun,  1 Mar 2015 11:05:55 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, Rob Herring <robh@...nel.org>,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH v2 -next 10/13] serial: earlycon: Allow earlycon params with name only

Allow earlycon param strings of the form
   earlycon=<name>

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/tty/serial/earlycon.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index da5e8c8..025ea01 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -109,13 +109,16 @@ int __init setup_earlycon(char *buf, const char *match,
 	len = strlen(match);
 	if (strncmp(buf, match, len))
 		return 0;
-	if (buf[len] && (buf[len] != ','))
-		return 0;
 
-	buf += len + 1;
+	if (buf[len]) {
+		if (buf[len] != ',')
+			return 0;
+		buf += len + 1;
+	} else
+		buf = NULL;
 
 	/* On parsing error, pass the options buf to the setup function */
-	if (!parse_options(&early_console_dev, buf))
+	if (buf && !parse_options(&early_console_dev, buf))
 		buf = NULL;
 
 	port->uartclk = BASE_BAUD * 16;
-- 
2.3.0

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