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>
diff --git a/drivers/net/wireless/ath5k/ath5k.h b/drivers/net/wireless/ath5k/ath5k.h
index 13df119..183ffc8 100644
--- a/drivers/net/wireless/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath5k/ath5k.h
@@ -1350,4 +1350,9 @@
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 9b5f31a..4af2607 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -1762,8 +1762,8 @@
* 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 @@
* 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 5e362a7..b40a928 100644
--- a/drivers/net/wireless/ath5k/desc.c
+++ b/drivers/net/wireless/ath5k/desc.c
@@ -71,7 +71,7 @@
/* 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 @@
/* 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;
