[PATCH] staging: r8188eu: Fix sparse endianness warnings.

[PATCH] staging: r8188eu: Fix sparse endianness warnings.

[Charlie Sands]

This patch fixes sparse warnings about the endianness of different
integers in the driver.

Signed-off-by: Charlie Sands <sandsch@northvilleschools.net>
---
 drivers/staging/r8188eu/core/rtw_br_ext.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c
index d68611ef22f8..ed41c4e30262 100644
--- a/drivers/staging/r8188eu/core/rtw_br_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_br_ext.c
@@ -70,7 +70,7 @@ static int __nat25_add_pppoe_tag(struct sk_buff *skb, struct pppoe_tag *tag)
 	struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN);
 	int data_len;
 
-	data_len = tag->tag_len + TAG_HDR_LEN;
+	data_len = be16_to_cpu(tag->tag_len) + TAG_HDR_LEN;
 	if (skb_tailroom(skb) < data_len)
 		return -1;
 
@@ -432,7 +432,7 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 		/*                Handle PPPoE frame                 */
 		/*---------------------------------------------------*/
 		struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN);
-		unsigned short *pMagic;
+		__be16 *pMagic;
 
 		switch (method) {
 		case NAT25_CHECK:
@@ -471,7 +471,7 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 						tag->tag_len = htons(MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN+old_tag_len);
 
 						/*  insert the magic_code+client mac in relay tag */
-						pMagic = (unsigned short *)tag->tag_data;
+						pMagic = (__be16 *)tag->tag_data;
 						*pMagic = htons(MAGIC_CODE);
 						memcpy(tag->tag_data+MAGIC_CODE_LEN, skb->data+ETH_ALEN, ETH_ALEN);
 
@@ -557,9 +557,11 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 						struct icmp6hdr  *hdr = (struct icmp6hdr *)(skb->data + ETH_HLEN + sizeof(*iph));
 						hdr->icmp6_cksum = 0;
 						hdr->icmp6_cksum = csum_ipv6_magic(&iph->saddr, &iph->daddr,
-										iph->payload_len,
+										be16_to_cpu(iph->payload_len),
 										IPPROTO_ICMPV6,
-										csum_partial((__u8 *)hdr, iph->payload_len, 0));
+										csum_partial((__u8 *)hdr,
+										be16_to_cpu(iph->payload_len),
+										0));
 					}
 				}
 			}
-- 
2.35.1

Re: [PATCH] staging: r8188eu: Fix sparse endianness warnings.

[Dan Carpenter]

On Tue, Mar 29, 2022 at 11:14:05PM -0400, Charlie Sands wrote:
> This patch fixes sparse warnings about the endianness of different
> integers in the driver.
> 
> Signed-off-by: Charlie Sands <sandsch@northvilleschools.net>

Thanks!  This is a bugfix though so it needs a fixes tag.

Fixes: 15865124feed ("staging: r8188eu: introduce new core dir for RTL8188eu driver")

Otherwise:

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

It's surprising that this code works at all.  I maybe have said before
that I suspect the pppoe stuff has not been well tested.

regards,
dan carpenter