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authorJohannes Berg <johannes.berg@intel.com>2012-11-29 13:00:10 +0100
committerJohannes Berg <johannes.berg@intel.com>2012-11-30 13:41:27 +0100
commitb9a9ada14aab17f08c1d9735601f1097cdcfc6de (patch)
tree47d823b696f262c53d5f52ef60bfb143b8444fa0 /net/mac80211
parentc604b9f219422e969fe371cc7259de34c3c5601d (diff)
mac80211: remove probe response temporary buffer allocation
Instead of allocating a temporary buffer to build IEs build them right into the SKB. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/tx.c9
-rw-r--r--net/mac80211/util.c26
2 files changed, 11 insertions, 24 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index d8ef3417bf2b..ba1ac9d62b08 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2620,7 +2620,7 @@ EXPORT_SYMBOL(ieee80211_nullfunc_get);
struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const u8 *ssid, size_t ssid_len,
- const u8 *ie, size_t ie_len)
+ size_t tailroom)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local;
@@ -2634,7 +2634,7 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
ie_ssid_len = 2 + ssid_len;
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
- ie_ssid_len + ie_len);
+ ie_ssid_len + tailroom);
if (!skb)
return NULL;
@@ -2655,11 +2655,6 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
memcpy(pos, ssid, ssid_len);
pos += ssid_len;
- if (ie) {
- pos = skb_put(skb, ie_len);
- memcpy(pos, ie, ie_len);
- }
-
return skb;
}
EXPORT_SYMBOL(ieee80211_probereq_get);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index f119b1b6c1a7..41c9841614b8 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1239,14 +1239,8 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
- size_t buf_len;
- u8 *buf;
u8 chan_no;
-
- /* FIXME: come up with a proper value */
- buf = kmalloc(200 + ie_len, GFP_KERNEL);
- if (!buf)
- return NULL;
+ int ies_len;
/*
* Do not send DS Channel parameter for directed probe requests
@@ -1258,15 +1252,16 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
else
chan_no = ieee80211_frequency_to_channel(chan->center_freq);
- buf_len = ieee80211_build_preq_ies(local, buf, 200 + ie_len,
- ie, ie_len, chan->band,
- ratemask, chan_no);
-
skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
- ssid, ssid_len,
- buf, buf_len);
+ ssid, ssid_len, 100 + ie_len);
if (!skb)
- goto out;
+ return NULL;
+
+ ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
+ skb_tailroom(skb),
+ ie, ie_len, chan->band,
+ ratemask, chan_no);
+ skb_put(skb, ies_len);
if (dst) {
mgmt = (struct ieee80211_mgmt *) skb->data;
@@ -1276,9 +1271,6 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
- out:
- kfree(buf);
-
return skb;
}