From: Johannes Berg <johannes@sipsolutions.net>
Date: Mon, 1 Dec 2008 17:19:36 +0000 (+0100)
Subject: p54: fix lm87 checksum endianness
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c91276592695e13d1b52eab572551017cbf96ee7;p=openwrt%2Fstaging%2Fblogic.git

p54: fix lm87 checksum endianness

This fixes the checksum calculation for lm87 firmwares
on big endian platforms, the device treats the data as
an array of 32-bit little endian values so the driver
needs to do that as well.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/p54/p54usb.c b/drivers/net/wireless/p54/p54usb.c
index e9630b949256..2dd3cd41d0fe 100644
--- a/drivers/net/wireless/p54/p54usb.c
+++ b/drivers/net/wireless/p54/p54usb.c
@@ -244,13 +244,13 @@ static void p54u_tx_3887(struct ieee80211_hw *dev, struct sk_buff *skb,
 	usb_submit_urb(data_urb, GFP_ATOMIC);
 }
 
-static __le32 p54u_lm87_chksum(const u32 *data, size_t length)
+static __le32 p54u_lm87_chksum(const __le32 *data, size_t length)
 {
 	u32 chk = 0;
 
 	length >>= 2;
 	while (length--) {
-		chk ^= *data++;
+		chk ^= le32_to_cpu(*data++);
 		chk = (chk >> 5) ^ (chk << 3);
 	}
 
@@ -270,7 +270,7 @@ static void p54u_tx_lm87(struct ieee80211_hw *dev, struct sk_buff *skb,
 	if (!data_urb)
 		return;
 
-	checksum = p54u_lm87_chksum((u32 *)skb->data, skb->len);
+	checksum = p54u_lm87_chksum((__le32 *)skb->data, skb->len);
 	hdr = (struct lm87_tx_hdr *)skb_push(skb, sizeof(*hdr));
 	hdr->chksum = checksum;
 	hdr->device_addr = addr;