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

Simon Glass
2016-06-09T02:55:15Z

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@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