diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c
index 78d70a6..a1b82c9 100644
--- a/drivers/net/ppp_async.c
+++ b/drivers/net/ppp_async.c
@@ -32,6 +32,7 @@
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include <linux/slab.h>
+#include <asm/unaligned.h>
 #include <asm/uaccess.h>
 #include <asm/string.h>
 
@@ -542,7 +543,7 @@
 	data = ap->tpkt->data;
 	count = ap->tpkt->len;
 	fcs = ap->tfcs;
-	proto = (data[0] << 8) + data[1];
+	proto = get_unaligned_be16(data);
 
 	/*
 	 * LCP packets with code values between 1 (configure-reqest)
@@ -963,7 +964,7 @@
 	code = data[0];
 	if (code != CONFACK && code != CONFREQ)
 		return;
-	dlen = (data[2] << 8) + data[3];
+	dlen = get_unaligned_be16(data + 2);
 	if (len < dlen)
 		return;		/* packet got truncated or length is bogus */
 
@@ -997,15 +998,14 @@
 	while (dlen >= 2 && dlen >= data[1] && data[1] >= 2) {
 		switch (data[0]) {
 		case LCP_MRU:
-			val = (data[2] << 8) + data[3];
+			val = get_unaligned_be16(data + 2);
 			if (inbound)
 				ap->mru = val;
 			else
 				ap->chan.mtu = val;
 			break;
 		case LCP_ASYNCMAP:
-			val = (data[2] << 24) + (data[3] << 16)
-				+ (data[4] << 8) + data[5];
+			val = get_unaligned_be32(data + 2);
 			if (inbound)
 				ap->raccm = val;
 			else