From a215aa7b9ab3759c047201199fba64d3042d7f13 Mon Sep 17 00:00:00 2001
From: Jeremy Erickson <jerickso@cs.unc.edu>
Date: Fri, 18 Apr 2014 17:06:00 -0400
Subject: Update 2.6.36 to 2.6.36.4
---
net/mac80211/tx.c | 27 +++++++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
(limited to 'net/mac80211/tx.c')
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index c54db966926b..9d5af5dd0d98 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1694,7 +1694,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_tx_info *info;
int ret = NETDEV_TX_BUSY, head_need;
u16 ethertype, hdrlen, meshhdrlen = 0;
__le16 fc;
@@ -1705,15 +1705,13 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
int nh_pos, h_pos;
struct sta_info *sta = NULL;
u32 sta_flags = 0;
+ struct sk_buff *tmp_skb;
if (unlikely(skb->len < ETH_HLEN)) {
ret = NETDEV_TX_OK;
goto fail;
}
- nh_pos = skb_network_header(skb) - skb->data;
- h_pos = skb_transport_header(skb) - skb->data;
-
/* convert Ethernet header to proper 802.11 header (based on
* operation mode) */
ethertype = (skb->data[12] << 8) | skb->data[13];
@@ -1885,6 +1883,20 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
goto fail;
}
+ /*
+ * If the skb is shared we need to obtain our own copy.
+ */
+ if (skb_shared(skb)) {
+ tmp_skb = skb;
+ skb = skb_copy(skb, GFP_ATOMIC);
+ kfree_skb(tmp_skb);
+
+ if (!skb) {
+ ret = NETDEV_TX_OK;
+ goto fail;
+ }
+ }
+
hdr.frame_control = fc;
hdr.duration_id = 0;
hdr.seq_ctrl = 0;
@@ -1903,6 +1915,9 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
encaps_len = 0;
}
+ nh_pos = skb_network_header(skb) - skb->data;
+ h_pos = skb_transport_header(skb) - skb->data;
+
skb_pull(skb, skip_header_bytes);
nh_pos -= skip_header_bytes;
h_pos -= skip_header_bytes;
@@ -1969,6 +1984,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
skb_set_network_header(skb, nh_pos);
skb_set_transport_header(skb, h_pos);
+ info = IEEE80211_SKB_CB(skb);
memset(info, 0, sizeof(*info));
dev->trans_start = jiffies;
@@ -2160,6 +2176,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
sdata = vif_to_sdata(vif);
+ if (!ieee80211_sdata_running(sdata))
+ goto out;
+
if (tim_offset)
*tim_offset = 0;
if (tim_length)
--
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