Messages in this thread Patch in this message | | | Date | Wed, 09 Nov 2011 13:26:43 -0800 | From | Greg KH <> | Subject | [081/262] mac80211: fix offchannel TX cookie matching |
| |
3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johannes Berg <johannes.berg@intel.com>
commit 28a1bcdb57d50f3038a255741ecc83e391e5282e upstream.
When I introduced in-kernel off-channel TX I introduced a bug -- the work can't be canceled again because the code clear the skb pointer. Fix this by keeping track separately of whether TX status has already been reported.
Reported-by: Jouni Malinen <j@w1.fi> Tested-by: Jouni Malinen <j@w1.fi> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- net/mac80211/cfg.c | 2 +- net/mac80211/ieee80211_i.h | 1 + net/mac80211/status.c | 2 +- net/mac80211/work.c | 2 +- 4 files changed, 4 insertions(+), 3 deletions(-)
--- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1798,7 +1798,7 @@ ieee80211_offchan_tx_done(struct ieee802 * so in that case userspace will have to deal with it. */ - if (wk->offchan_tx.wait && wk->offchan_tx.frame) + if (wk->offchan_tx.wait && !wk->offchan_tx.status) cfg80211_mgmt_tx_status(wk->sdata->dev, (unsigned long) wk->offchan_tx.frame, wk->ie, wk->ie_len, false, GFP_KERNEL); --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -328,6 +328,7 @@ struct ieee80211_work { struct { struct sk_buff *frame; u32 wait; + bool status; } offchan_tx; }; --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -336,7 +336,7 @@ void ieee80211_tx_status(struct ieee8021 continue; if (wk->offchan_tx.frame != skb) continue; - wk->offchan_tx.frame = NULL; + wk->offchan_tx.status = true; break; } rcu_read_unlock(); --- a/net/mac80211/work.c +++ b/net/mac80211/work.c @@ -553,7 +553,7 @@ ieee80211_offchannel_tx(struct ieee80211 /* * After this, offchan_tx.frame remains but now is no * longer a valid pointer -- we still need it as the - * cookie for canceling this work. + * cookie for canceling this work/status matching. */ ieee80211_tx_skb(wk->sdata, wk->offchan_tx.frame);
| |