[WAN]: drivers/net/wan/: use of time_after macro

From: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>

Use of the time_after() macro, defined at linux/jiffies.h, which deal
with wrapping correctly and are nicer to read.

Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>
Signed-off-by: Domen Puncer <domen@coderock.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wan/sdla_ft1.c b/drivers/net/wan/sdla_ft1.c
index 5e31248..9d6528a 100644
--- a/drivers/net/wan/sdla_ft1.c
+++ b/drivers/net/wan/sdla_ft1.c
@@ -29,6 +29,7 @@
 #include <linux/wanrouter.h>	/* WAN router definitions */
 #include <linux/wanpipe.h>	/* WANPIPE common user API definitions */
 #include <linux/if_arp.h>	/* ARPHRD_* defines */
+#include <linux/jiffies.h>	/* time_after() macro */
 
 #include <linux/inetdevice.h>
 #include <asm/uaccess.h>
@@ -164,7 +165,7 @@
 
 		timeout = jiffies;
 		while (mb->return_code != 'I')	/* Wait 1s for board to initialize */
-			if ((jiffies - timeout) > 1*HZ) break;
+			if (time_after(jiffies, timeout + 1*HZ)) break;
 
 		if (mb->return_code != 'I') {
 			printk(KERN_INFO