From: Harvey Harrison <harvey.harrison@gmail.com>
Date: Tue, 4 Nov 2008 01:09:55 +0000 (-0800)
Subject: printk: ipv4 address digits printed in reverse order
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b9ac99855dcc0316ba2feee2b0d3e578f8315b75;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

printk: ipv4 address digits printed in reverse order

put_dec_trunc prints the digits in reverse order and is reversed
inside number(). Continue using put_dec_trunc, but reverse each quad
in ip4_addr_string.

[Noticed by Julius Volz]

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index dd7cc7fa3e77..6897724ff5df 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -620,11 +620,15 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
 			 int precision, int flags)
 {
 	char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
+	char temp[3];	/* hold each IP quad in reverse order */
 	char *p = ip4_addr;
-	int i;
+	int i, digits;
 
 	for (i = 0; i < 4; i++) {
-		p = put_dec_trunc(p, addr[i]);
+		digits = put_dec_trunc(temp, addr[i]) - temp;
+		/* reverse the digits in the quad */
+		while (digits--)
+			*p++ = temp[digits];
 		if (i != 3)
 			*p++ = '.';
 	}