[U-Boot] [PATCH 65/71] serial: Use puts() and hang() instead of panic() in SPL

[Marek Vasut]

If case the get_current() call fails before relocation, the U-Boot
must try to print an error message, fail and either reset or halt.
Such error is critical enough to halt the system, as it means the
system is in very bad state.

This is now also used in SPL, since CONFIG_SERIAL_MULTI is enabled
unconditionally. To avoid compiling whole vsprintf.c into SPL, use
puts() to print error message and hang() to stop the system in case
of SPL build.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Marek Vasut <marek.vasut at gmail.com>
Cc: Tom Rini <trini at ti.com>
---
 common/serial.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/common/serial.c b/common/serial.c
index cef4ba8..8e0d8a1 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -230,8 +230,14 @@ static struct serial_device *get_current(void)
 		dev = default_serial_console();
 
 		/* We must have a console device */
-		if (!dev)
-			panic("Cannot find console");
+		if (!dev) {
+#ifdef CONFIG_SPL_BUILD
+			puts("Cannot find console\n");
+			hang();
+#else
+			panic("Cannot find console\n");
+#endif
+		}
 	} else
 		dev = serial_current;
 	return dev;
-- 
1.7.10.4