ath9k: Fix lockdep warning
This patch fixes the lockdep warning shown below, and also
initializes the starting sequence number when starting a TX
aggregation session.
=============================================
[ INFO: possible recursive locking detected ]
2.6.29-rc2-wl #21
---------------------------------------------
swapper/0 is trying to acquire lock:
(_xmit_IEEE80211#2){-+..}, at: [<ffffffff80456d71>] __qdisc_run+0x221/0x290
but task is already holding lock:
(_xmit_IEEE80211#2){-+..}, at: [<ffffffff80456d71>] __qdisc_run+0x221/0x290
other info that might help us debug this:
7 locks held by swapper/0:
#0: (rcu_read_lock){..--}, at: [<ffffffff80442a63>] dev_queue_xmit+0x53/0x620
#1: (_xmit_ETHER#2){-+..}, at: [<ffffffff80456d71>] __qdisc_run+0x221/0x290
#2: (rcu_read_lock){..--}, at: [<ffffffff80442a63>] dev_queue_xmit+0x53/0x620
#3: (_xmit_IEEE80211#2){-+..}, at: [<ffffffff80456d71>] __qdisc_run+0x221/0x290
#4: (rcu_read_lock){..--}, at: [<ffffffffa0154919>] ieee80211_master_start_xmit+0x219/0x6c0 [mac80211]
#5: (rcu_read_lock){..--}, at: [<ffffffffa01427c6>] ieee80211_start_tx_ba_session+0x66/0x4e0 [mac80211]
#6: (rcu_read_lock){..--}, at: [<ffffffff80442a63>] dev_queue_xmit+0x53/0x620
stack backtrace:
Pid: 0, comm: swapper Not tainted 2.6.29-rc2-wl #21
Call Trace:
<IRQ> [<ffffffff8026c329>] __lock_acquire+0x1be9/0x1c40
[<ffffffff80442af1>] dev_queue_xmit+0xe1/0x620
[<ffffffff8026a8cc>] __lock_acquire+0x18c/0x1c40
[<ffffffff8026c3d5>] lock_acquire+0x55/0x70
[<ffffffff80456d71>] __qdisc_run+0x221/0x290
[<ffffffff804dbeb9>] _spin_lock+0x39/0x50
[<ffffffff80456d71>] __qdisc_run+0x221/0x290
[<ffffffff804dbd2f>] _spin_unlock+0x1f/0x50
[<ffffffff80456d71>] __qdisc_run+0x221/0x290
[<ffffffff80442d18>] dev_queue_xmit+0x308/0x620
[<ffffffff80442a63>] dev_queue_xmit+0x53/0x620
[<ffffffffa0142a63>] ieee80211_start_tx_ba_session+0x303/0x4e0 [mac80211]
[<ffffffffa01427c6>] ieee80211_start_tx_ba_session+0x66/0x4e0 [mac80211]
[<ffffffffa0149dae>] rate_control_get_rate+0xae/0xc0 [mac80211]
[<ffffffffa01526b5>] invoke_tx_handlers+0x655/0x1000 [mac80211]
[<ffffffff802699fd>] mark_held_locks+0x4d/0x90
[<ffffffff804dbcf5>] _spin_unlock_irqrestore+0x65/0x80
[<ffffffffa0151aaa>] __ieee80211_tx_prepare+0x16a/0x310 [mac80211]
[<ffffffffa0151adc>] __ieee80211_tx_prepare+0x19c/0x310 [mac80211]
[<ffffffff80439cc2>] pskb_expand_head+0x112/0x190
[<ffffffffa0154986>] ieee80211_master_start_xmit+0x286/0x6c0 [mac80211]
[<ffffffffa0154919>] ieee80211_master_start_xmit+0x219/0x6c0 [mac80211]
[<ffffffff8026a8cc>] __lock_acquire+0x18c/0x1c40
[<ffffffff80456d8e>] __qdisc_run+0x23e/0x290
[<ffffffff80442d18>] dev_queue_xmit+0x308/0x620
[<ffffffff80442a63>] dev_queue_xmit+0x53/0x620
[<ffffffffa0154221>] ieee80211_subif_start_xmit+0x4a1/0x980 [mac80211]
[<ffffffffa0153f18>] ieee80211_subif_start_xmit+0x198/0x980 [mac80211]
[<ffffffff80456d8e>] __qdisc_run+0x23e/0x290
[<ffffffff80442d18>] dev_queue_xmit+0x308/0x620
[<ffffffff80442a63>] dev_queue_xmit+0x53/0x620
[<ffffffffa028ecfd>] ip6_output+0x62d/0x1230 [ipv6]
[<ffffffff8024ca00>] __mod_timer+0xb0/0xd0
[<ffffffffa02ad25a>] mld_sendpack+0x3fa/0x4a0 [ipv6]
[<ffffffffa02ace60>] mld_sendpack+0x0/0x4a0 [ipv6]
[<ffffffffa02adf90>] mld_ifc_timer_expire+0x0/0x340 [ipv6]
[<ffffffffa02ae219>] mld_ifc_timer_expire+0x289/0x340 [ipv6]
[<ffffffffa02adf90>] mld_ifc_timer_expire+0x0/0x340 [ipv6]
[<ffffffff8024c097>] run_timer_softirq+0x147/0x220
[<ffffffff802473fb>] __do_softirq+0x9b/0x180
[<ffffffff80265516>] tick_dev_program_event+0x36/0xb0
[<ffffffff8020d77c>] call_softirq+0x1c/0x30
[<ffffffff8020f2c5>] do_softirq+0x65/0xb0
[<ffffffff80246ebd>] irq_exit+0x9d/0xc0
[<ffffffff80221db6>] smp_apic_timer_interrupt+0x86/0xd0
[<ffffffff8020d1b3>] apic_timer_interrupt+0x13/0x20
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
d22b0022e7