+++ /dev/null
---- a/ath/if_ath.c
-+++ b/ath/if_ath.c
-@@ -3239,7 +3239,6 @@ ath_hardstart(struct sk_buff *skb, struc
- struct ath_softc *sc = dev->priv;
- struct ieee80211_node *ni = NULL;
- struct ath_buf *bf = NULL;
-- struct ether_header *eh;
- ath_bufhead bf_head;
- struct ath_buf *tbf, *tempbf;
- struct sk_buff *tskb;
-@@ -3251,6 +3250,7 @@ ath_hardstart(struct sk_buff *skb, struc
- */
- int requeue = 0;
- #ifdef ATH_SUPERG_FF
-+ struct ether_header *eh;
- unsigned int pktlen;
- struct ieee80211com *ic = &sc->sc_ic;
- struct ath_node *an;
-@@ -3316,27 +3316,9 @@ ath_hardstart(struct sk_buff *skb, struc
- requeue = 1;
- goto hardstart_fail;
- }
--#endif
-
-- /* If the skb data is shared, we will copy it so we can strip padding
-- * without affecting any other bridge ports. */
-- if (skb_cloned(skb)) {
-- /* Remember the original SKB so we can free up our references */
-- struct sk_buff *skb_new;
-- skb_new = skb_copy(skb, GFP_ATOMIC);
-- if (skb_new == NULL) {
-- DPRINTF(sc, ATH_DEBUG_XMIT,
-- "Dropping; skb_copy failure.\n");
-- /* No free RAM, do not requeue! */
-- goto hardstart_fail;
-- }
-- ieee80211_skb_copy_noderef(skb, skb_new);
-- ieee80211_dev_kfree_skb(&skb);
-- skb = skb_new;
-- }
- eh = (struct ether_header *)skb->data;
-
--#ifdef ATH_SUPERG_FF
- /* NB: use this lock to protect an->an_tx_ffbuf (and txq->axq_stageq)
- * in athff_can_aggregate() call too. */
- ATH_TXQ_LOCK_IRQ(txq);
---- a/net80211/ieee80211_output.c
-+++ b/net80211/ieee80211_output.c
-@@ -283,7 +283,7 @@ ieee80211_hardstart(struct sk_buff *skb,
- * normal vap. */
- if (vap->iv_xrvap && (ni == vap->iv_bss) &&
- vap->iv_xrvap->iv_sta_assoc) {
-- struct sk_buff *skb1 = skb_copy(skb, GFP_ATOMIC);
-+ struct sk_buff *skb1 = skb_clone(skb, GFP_ATOMIC);
- if (skb1) {
- memset(SKB_CB(skb1), 0, sizeof(struct ieee80211_cb));
- #ifdef IEEE80211_DEBUG_REFCNT
-@@ -566,7 +566,7 @@ ieee80211_skbhdr_adjust(struct ieee80211
- struct ieee80211_key *key, struct sk_buff *skb, int ismulticast)
- {
- /* XXX pre-calculate per node? */
-- int need_headroom = LLC_SNAPFRAMELEN + hdrsize + IEEE80211_ADDR_LEN;
-+ int need_headroom = LLC_SNAPFRAMELEN + hdrsize;
- int need_tailroom = 0;
- #ifdef ATH_SUPERG_FF
- int isff = ATH_FF_MAGIC_PRESENT(skb);
-@@ -608,109 +608,56 @@ ieee80211_skbhdr_adjust(struct ieee80211
- need_tailroom += cip->ic_miclen;
- }
-
-- if (skb_shared(skb)) {
-- /* Take our own reference to the node in the clone */
-- ieee80211_ref_node(SKB_CB(skb)->ni);
-- /* Unshare the node, decrementing users in the old skb */
-- skb = skb_unshare(skb, GFP_ATOMIC);
-- }
-+ need_headroom -= skb_headroom(skb);
-+ if (isff)
-+ need_tailroom -= skb_tailroom(skb2);
-+ else
-+ need_tailroom -= skb_tailroom(skb);
-+
-+ if (need_headroom < 0)
-+ need_headroom = 0;
-+ if (need_tailroom < 0)
-+ need_tailroom = 0;
-
--#ifdef ATH_SUPERG_FF
-- if (isff) {
-- if (skb == NULL) {
-- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot unshare for encapsulation\n",
-- __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- ieee80211_dev_kfree_skb(&skb2);
-+ if (skb_cloned(skb) || (need_headroom > 0) ||
-+ (!isff && (need_tailroom > 0))) {
-
-- return NULL;
-+ if (pskb_expand_head(skb, need_headroom, need_tailroom, GFP_ATOMIC)) {
-+ IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-+ "%s: cannot expand storage (tail)\n", __func__);
-+ goto error;
- }
-+ }
-
-- /* first skb header */
-- if (skb_headroom(skb) < need_headroom) {
-- struct sk_buff *tmp = skb;
-- skb = skb_realloc_headroom(skb, need_headroom);
-- if (skb == NULL) {
-- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot expand storage (head1)\n",
-- __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- ieee80211_dev_kfree_skb(&skb2);
-- return NULL;
-- } else
-- ieee80211_skb_copy_noderef(tmp, skb);
-- ieee80211_dev_kfree_skb(&tmp);
-- /* NB: cb[] area was copied, but not next ptr. must do that
-- * prior to return on success. */
-- }
-+#ifdef ATH_SUPERG_FF
-+ if (isff) {
-+ inter_headroom -= skb_headroom(skb2);
-+ if (inter_headroom < 0)
-+ inter_headroom = 0;
-+ if ((skb_cloned(skb2) ||
-+ (inter_headroom > 0) || (need_tailroom > 0))) {
-
-- /* second skb with header and tail adjustments possible */
-- if (skb_tailroom(skb2) < need_tailroom) {
-- int n = 0;
-- if (inter_headroom > skb_headroom(skb2))
-- n = inter_headroom - skb_headroom(skb2);
-- if (pskb_expand_head(skb2, n,
-- need_tailroom - skb_tailroom(skb2), GFP_ATOMIC)) {
-- ieee80211_dev_kfree_skb(&skb2);
-+ if (pskb_expand_head(skb2, inter_headroom,
-+ need_tailroom, GFP_ATOMIC)) {
- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot expand storage (tail2)\n",
-- __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- /* this shouldn't happen, but don't send first ff either */
-- ieee80211_dev_kfree_skb(&skb);
-+ "%s: cannot expand storage (tail)\n", __func__);
-+ goto error;
- }
-- } else if (skb_headroom(skb2) < inter_headroom) {
-- struct sk_buff *tmp = skb2;
--
-- skb2 = skb_realloc_headroom(skb2, inter_headroom);
-- if (skb2 == NULL) {
-- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot expand storage (head2)\n",
-- __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- /* this shouldn't happen, but don't send first ff either */
-- ieee80211_dev_kfree_skb(&skb);
-- skb = NULL;
-- } else
-- ieee80211_skb_copy_noderef(tmp, skb);
-- ieee80211_dev_kfree_skb(&tmp);
-- }
-- if (skb) {
-- skb->next = skb2;
- }
-- return skb;
-+ skb->next = skb2;
- }
- #endif /* ATH_SUPERG_FF */
-- if (skb == NULL) {
-- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot unshare for encapsulation\n", __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- } else if (skb_tailroom(skb) < need_tailroom) {
-- int n = 0;
-- if (need_headroom > skb_headroom(skb))
-- n = need_headroom - skb_headroom(skb);
-- if (pskb_expand_head(skb, n, need_tailroom -
-- skb_tailroom(skb), GFP_ATOMIC)) {
-- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot expand storage (tail)\n", __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- ieee80211_dev_kfree_skb(&skb);
-- }
-- } else if (skb_headroom(skb) < need_headroom) {
-- struct sk_buff *tmp = skb;
-- skb = skb_realloc_headroom(skb, need_headroom);
-- /* Increment reference count after copy */
-- if (skb == NULL) {
-- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
-- "%s: cannot expand storage (head)\n", __func__);
-- vap->iv_stats.is_tx_nobuf++;
-- } else
-- ieee80211_skb_copy_noderef(tmp, skb);
-- ieee80211_dev_kfree_skb(&tmp);
-- }
-
- return skb;
-+
-+error:
-+ vap->iv_stats.is_tx_nobuf++;
-+ ieee80211_dev_kfree_skb(&skb);
-+#ifdef ATH_SUPERG_FF
-+ if (skb2)
-+ ieee80211_dev_kfree_skb(&skb2);
-+#endif
-+ return NULL;
- }
-
- #define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none)
---- a/net80211/ieee80211_input.c
-+++ b/net80211/ieee80211_input.c
-@@ -204,7 +204,6 @@ ieee80211_input(struct ieee80211vap * va
- struct ieee80211_frame *wh;
- struct ieee80211_key *key;
- struct ether_header *eh;
-- struct sk_buff *skb2;
- #ifdef ATH_SUPERG_FF
- struct llc *llc;
- #endif
-@@ -244,20 +243,6 @@ ieee80211_input(struct ieee80211vap * va
- vap->iv_stats.is_rx_tooshort++;
- goto out;
- }
-- /* Clone the SKB... we assume somewhere in this driver that we 'own'
-- * the skbuff passed into hard start and we do a lot of messing with it
-- * but bridges under some cases will not clone for the first pass of skb
-- * to a bridge port, but will then clone for subsequent ones. This is
-- * odd behavior but it means that if we have trashed the skb we are given
-- * then other ports get clones of the residual garbage.
-- */
-- if ((skb2 = skb_copy(skb, GFP_ATOMIC)) == NULL) {
-- vap->iv_devstats.tx_dropped++;
-- goto out;
-- }
-- ieee80211_skb_copy_noderef(skb, skb2);
-- ieee80211_dev_kfree_skb(&skb);
-- skb = skb2;
-
- /*
- * Bit of a cheat here, we use a pointer for a 3-address
-@@ -738,7 +723,7 @@ ieee80211_input(struct ieee80211vap * va
- /* ether_type must be length as FF frames are always LLC/SNAP encap'd */
- frame_len = ntohs(eh_tmp->ether_type);
-
-- skb1 = skb_copy(skb, GFP_ATOMIC);
-+ skb1 = skb_clone(skb, GFP_ATOMIC);
- if (skb1 == NULL)
- goto err;
- ieee80211_skb_copy_noderef(skb, skb1);
-@@ -1137,7 +1122,7 @@ ieee80211_deliver_data(struct ieee80211_
-
- if (ETHER_IS_MULTICAST(eh->ether_dhost) && !netif_queue_stopped(dev)) {
- /* Create a SKB for the BSS to send out. */
-- skb1 = skb_copy(skb, GFP_ATOMIC);
-+ skb1 = skb_clone(skb, GFP_ATOMIC);
- if (skb1)
- SKB_CB(skb1)->ni = ieee80211_ref_node(vap->iv_bss);
- }
projects / openwrt / staging / chunkeey.git / blobdiff