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Date: Thu, 6 Jan 2011 17:37:35 +0800
From: Changli Gao <xiaosuo@...il.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: Paul Mackerras <paulus@...ba.org>, linux-ppp@...r.kernel.org,
netdev@...r.kernel.org, Changli Gao <xiaosuo@...il.com>
Subject: [PATCH] net: ppp: use {get,put}_unaligned_be{16,32}
Signed-off-by: Changli Gao <xiaosuo@...il.com>
---
drivers/net/ppp_async.c | 10 +++++-----
drivers/net/ppp_deflate.c | 9 ++++-----
drivers/net/ppp_generic.c | 9 ++++-----
drivers/net/ppp_mppe.c | 7 +++----
drivers/net/ppp_synctty.c | 3 ++-
5 files changed, 18 insertions(+), 20 deletions(-)
diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c
index 78d70a6..cbe1e13 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 <linux/unaligned/be_struct.h>
#include <asm/uaccess.h>
#include <asm/string.h>
@@ -542,7 +543,7 @@ ppp_async_encode(struct asyncppp *ap)
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 @@ static void async_lcp_peek(struct asyncppp *ap, unsigned char *data,
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 @@ static void async_lcp_peek(struct asyncppp *ap, unsigned char *data,
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
diff --git a/drivers/net/ppp_deflate.c b/drivers/net/ppp_deflate.c
index 695bc83..df3ce78 100644
--- a/drivers/net/ppp_deflate.c
+++ b/drivers/net/ppp_deflate.c
@@ -41,6 +41,7 @@
#include <linux/ppp-comp.h>
#include <linux/zlib.h>
+#include <linux/unaligned/be_struct.h>
/*
* State for a Deflate (de)compressor.
@@ -232,11 +233,9 @@ static int z_compress(void *arg, unsigned char *rptr, unsigned char *obuf,
*/
wptr[0] = PPP_ADDRESS(rptr);
wptr[1] = PPP_CONTROL(rptr);
- wptr[2] = PPP_COMP >> 8;
- wptr[3] = PPP_COMP;
+ put_unaligned_be16(PPP_COMP, wptr + 2);
wptr += PPP_HDRLEN;
- wptr[0] = state->seqno >> 8;
- wptr[1] = state->seqno;
+ put_unaligned_be16(state->seqno, wptr);
wptr += DEFLATE_OVHD;
olen = PPP_HDRLEN + DEFLATE_OVHD;
state->strm.next_out = wptr;
@@ -451,7 +450,7 @@ static int z_decompress(void *arg, unsigned char *ibuf, int isize,
}
/* Check the sequence number. */
- seq = (ibuf[PPP_HDRLEN] << 8) + ibuf[PPP_HDRLEN+1];
+ seq = get_unaligned_be16(ibuf + PPP_HDRLEN);
if (seq != (state->seqno & 0xffff)) {
if (state->debug)
printk(KERN_DEBUG "z_decompress%d: bad seq # %d, expected %d\n",
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index 6456484..0a81f0b 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -46,6 +46,7 @@
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/unaligned/be_struct.h>
#include <net/slhc_vj.h>
#include <asm/atomic.h>
@@ -210,7 +211,7 @@ struct ppp_net {
};
/* Get the PPP protocol number from a skb */
-#define PPP_PROTO(skb) (((skb)->data[0] << 8) + (skb)->data[1])
+#define PPP_PROTO(skb) get_unaligned_be16((skb)->data)
/* We limit the length of ppp->file.rq to this (arbitrary) value */
#define PPP_MAX_RQLEN 32
@@ -964,8 +965,7 @@ ppp_start_xmit(struct sk_buff *skb, struct net_device *dev)
pp = skb_push(skb, 2);
proto = npindex_to_proto[npi];
- pp[0] = proto >> 8;
- pp[1] = proto;
+ put_unaligned_be16(proto, pp);
netif_stop_queue(dev);
skb_queue_tail(&ppp->file.xq, skb);
@@ -1473,8 +1473,7 @@ static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb)
q = skb_put(frag, flen + hdrlen);
/* make the MP header */
- q[0] = PPP_MP >> 8;
- q[1] = PPP_MP;
+ put_unaligned_be16(PPP_MP, q);
if (ppp->flags & SC_MP_XSHORTSEQ) {
q[2] = bits + ((ppp->nxseq >> 8) & 0xf);
q[3] = ppp->nxseq;
diff --git a/drivers/net/ppp_mppe.c b/drivers/net/ppp_mppe.c
index 6d1a1b8..44dab65 100644
--- a/drivers/net/ppp_mppe.c
+++ b/drivers/net/ppp_mppe.c
@@ -55,6 +55,7 @@
#include <linux/ppp_defs.h>
#include <linux/ppp-comp.h>
#include <linux/scatterlist.h>
+#include <linux/unaligned/be_struct.h>
#include "ppp_mppe.h"
@@ -395,16 +396,14 @@ mppe_compress(void *arg, unsigned char *ibuf, unsigned char *obuf,
*/
obuf[0] = PPP_ADDRESS(ibuf);
obuf[1] = PPP_CONTROL(ibuf);
- obuf[2] = PPP_COMP >> 8; /* isize + MPPE_OVHD + 1 */
- obuf[3] = PPP_COMP; /* isize + MPPE_OVHD + 2 */
+ put_unaligned_be16(PPP_COMP, obuf + 2);
obuf += PPP_HDRLEN;
state->ccount = (state->ccount + 1) % MPPE_CCOUNT_SPACE;
if (state->debug >= 7)
printk(KERN_DEBUG "mppe_compress[%d]: ccount %d\n", state->unit,
state->ccount);
- obuf[0] = state->ccount >> 8;
- obuf[1] = state->ccount & 0xff;
+ put_unaligned_be16(state->ccount, obuf);
if (!state->stateful || /* stateless mode */
((state->ccount & 0xff) == 0xff) || /* "flag" packet */
diff --git a/drivers/net/ppp_synctty.c b/drivers/net/ppp_synctty.c
index 4c95ec3..fe86826 100644
--- a/drivers/net/ppp_synctty.c
+++ b/drivers/net/ppp_synctty.c
@@ -45,6 +45,7 @@
#include <linux/completion.h>
#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/unaligned/be_struct.h>
#include <asm/uaccess.h>
#define PPP_VERSION "2.4.2"
@@ -563,7 +564,7 @@ ppp_sync_txmunge(struct syncppp *ap, struct sk_buff *skb)
int islcp;
data = skb->data;
- proto = (data[0] << 8) + data[1];
+ proto = get_unaligned_be16(data);
/* LCP packets with codes between 1 (configure-request)
* and 7 (code-reject) must be sent as though no options
--
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