From: Simon Glass <sjg@chromium.org>
Date: Tue, 29 Dec 2015 12:22:46 +0000 (-0700)
Subject: tiny-printf: Avoid printing NULL strings
X-Git-Tag: v2016.03-rc1~243^2~48
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=8e31681c5a5a2fd6bbdf751bcc900a4481e2fa29;p=u-boot

tiny-printf: Avoid printing NULL strings

Add a check for NULL strings to avoid printing junk to the console.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
---

diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c
index 403b134cd1..efe5c25a59 100644
--- a/lib/tiny-printf.c
+++ b/lib/tiny-printf.c
@@ -108,8 +108,10 @@ int vprintf(const char *fmt, va_list va)
 				w--;
 			while (w-- > 0)
 				putc(lz ? '0' : ' ');
-			while ((ch = *p++))
-				putc(ch);
+			if (p) {
+				while ((ch = *p++))
+					putc(ch);
+			}
 		}
 	}