From 5c76d3d51693144c8424f4ce6ea51ff229304fc4 Mon Sep 17 00:00:00 2001
From: MurphyZhao <d2014zjt@163.com>
Date: Mon, 21 Jan 2019 18:35:13 +0800
Subject: [PATCH] =?UTF-8?q?[src][kservice.c]=20=E4=BF=AE=E5=A4=8D=20snprin?=
 =?UTF-8?q?tf=20=E4=B8=AD=20`print=5Fnumber`=20=E5=87=BD=E6=95=B0=E9=94=99?=
 =?UTF-8?q?=E8=AF=AF=E8=A7=A3=E6=9E=90=20`.0`=20format=20=E7=9A=84?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98?=
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Signed-off-by: MurphyZhao <d2014zjt@163.com>
---
 src/kservice.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/kservice.c b/src/kservice.c
index c938f4110a..35a9210c25 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -601,6 +601,7 @@ static char *print_number(char *buf,
 #else
     char tmp[16];
 #endif
+    int precision_bak = precision;
     const char *digits;
     static const char small_digits[] = "0123456789abcdef";
     static const char large_digits[] = "0123456789ABCDEF";
@@ -724,7 +725,7 @@ static char *print_number(char *buf,
 #endif
 
     /* put number in the temporary buffer */
-    while (i-- > 0)
+    while (i-- > 0 && (precision_bak != 0))
     {
         if (buf <= end)
             *buf = tmp[i];