[U-Boot] [PATCH v2] tiny-printf: Correct the snprintf() implementation

[Simon Glass]

This current code passes the variable arguments list to sprintf(). This is
not correct. Fix it by calling _vprintf() directly.

This makes firefly-rk3288 boot again.

Fixes: abeb272 ("tiny-printf: Support snprintf()")
Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Correct the 'Fixes' line

 lib/tiny-printf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c
index 5ea2555..3c65fc9 100644
--- a/lib/tiny-printf.c
+++ b/lib/tiny-printf.c
@@ -168,8 +168,10 @@ int snprintf(char *buf, size_t size, const char *fmt, ...)
 	int ret;
 
 	va_start(va, fmt);
-	ret = sprintf(buf, fmt, va);
+	outstr = buf;
+	ret = _vprintf(fmt, va, putc_outstr);
 	va_end(va);
+	*outstr = '\0';
 
 	return ret;
 }
-- 
2.8.0.rc3.226.g39d4020