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authorBob Copeland <me@bobcopeland.com>2008-12-18 23:23:05 -0500
committerJohn W. Linville <linville@tuxdriver.com>2008-12-19 15:24:02 -0500
commitfd6effcaf8a894c0a0f602b943dbc54a170d4418 (patch)
tree121c93ef571292b7a9d9e89294ba88f29c75ae3e
parent520eb82076993b7f55ef9b80771d264272e5127b (diff)
ath5k: correct packet length in tx descriptors
Packet length calculation (which includes frame check sequence) should take into account whether we add a pad field or not. Extract the calculation into a helper and use it in both places. Changes to desc.c Changes-licensed-under: ISC Changes to ath5k.h, base.c Changes-licensed-under: 3-Clause-BSD Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath5k/ath5k.h5
-rw-r--r--drivers/net/wireless/ath5k/base.c8
-rw-r--r--drivers/net/wireless/ath5k/desc.c4
3 files changed, 11 insertions, 6 deletions
diff --git a/drivers/net/wireless/ath5k/ath5k.h b/drivers/net/wireless/ath5k/ath5k.h
index 13df1191b07..183ffc8e62c 100644
--- a/drivers/net/wireless/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath5k/ath5k.h
@@ -1350,4 +1350,9 @@ static inline u32 ath5k_hw_bitswap(u32 val, unsigned int bits)
return retval;
}
+static inline int ath5k_pad_size(int hdrlen)
+{
+ return (hdrlen < 24) ? 0 : hdrlen & 3;
+}
+
#endif
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index 9b5f31aab57..4af2607deec 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -1762,8 +1762,8 @@ accept:
* not try to remove padding from short control frames that do
* not have payload. */
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
- padsize = hdrlen & 3;
- if (padsize && hdrlen >= 24) {
+ padsize = ath5k_pad_size(hdrlen);
+ if (padsize) {
memmove(skb->data + padsize, skb->data, hdrlen);
skb_pull(skb, padsize);
}
@@ -2638,8 +2638,8 @@ ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
* if this is not the case we add the padding after the header
*/
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
- padsize = hdrlen & 3;
- if (padsize && hdrlen >= 24) {
+ padsize = ath5k_pad_size(hdrlen);
+ if (padsize) {
if (skb_headroom(skb) < padsize) {
ATH5K_ERR(sc, "tx hdrlen not %%4: %d not enough"
diff --git a/drivers/net/wireless/ath5k/desc.c b/drivers/net/wireless/ath5k/desc.c
index 5e362a7a362..b40a9287a39 100644
--- a/drivers/net/wireless/ath5k/desc.c
+++ b/drivers/net/wireless/ath5k/desc.c
@@ -71,7 +71,7 @@ ath5k_hw_setup_2word_tx_desc(struct ath5k_hw *ah, struct ath5k_desc *desc,
/* Verify and set frame length */
/* remove padding we might have added before */
- frame_len = pkt_len - (hdr_len & 3) + FCS_LEN;
+ frame_len = pkt_len - ath5k_pad_size(hdr_len) + FCS_LEN;
if (frame_len & ~AR5K_2W_TX_DESC_CTL0_FRAME_LEN)
return -EINVAL;
@@ -202,7 +202,7 @@ static int ath5k_hw_setup_4word_tx_desc(struct ath5k_hw *ah,
/* Verify and set frame length */
/* remove padding we might have added before */
- frame_len = pkt_len - (hdr_len & 3) + FCS_LEN;
+ frame_len = pkt_len - ath5k_pad_size(hdr_len) + FCS_LEN;
if (frame_len & ~AR5K_4W_TX_DESC_CTL0_FRAME_LEN)
return -EINVAL;