From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Sat, 19 Aug 2017 01:43:17 +0000 (+0800)
Subject: serial: earlycon: Only try fdt when specify 'earlycon' exactly
X-Git-Tag: v4.14-rc1~149^2~20
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=447ef990ad9e909443ec16edb837c6e37664f5ba;p=platform%2Fkernel%2Flinux-rpi.git

serial: earlycon: Only try fdt when specify 'earlycon' exactly

When moving earlycon early_param handling to serial, the devicetree
earlycons enable condition changed slightly.

We used to only do that for 'console'/'earlycon', but now would also
for 'console='/'earlycon='.

Fix it by using the same condition like before.

Fixes: d503187b6cc4 (of/serial: move earlycon early_param handling to serial)
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index c365154..335933e 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -220,7 +220,7 @@ static int __init param_setup_earlycon(char *buf)
 		if (IS_ENABLED(CONFIG_ACPI_SPCR_TABLE)) {
 			earlycon_init_is_deferred = true;
 			return 0;
-		} else {
+		} else if (!buf) {
 			return early_init_dt_scan_chosen_stdout();
 		}
 	}