This is a note to let you know that I've just added the patch titled wl1251: add a missing spin_lock_init() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: wl1251-add-a-missing-spin_lock_init.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From f581a0dd744fe32b0a8805e279c59ec1ac676d60 Mon Sep 17 00:00:00 2001 From: Cong Wang <xiyou.wangcong@xxxxxxxxx> Date: Thu, 31 Aug 2017 16:47:43 +0200 Subject: wl1251: add a missing spin_lock_init() From: Cong Wang <xiyou.wangcong@xxxxxxxxx> commit f581a0dd744fe32b0a8805e279c59ec1ac676d60 upstream. wl1251: add a missing spin_lock_init() This fixes the following kernel warning: [ 5668.771453] BUG: spinlock bad magic on CPU#0, kworker/u2:3/9745 [ 5668.771850] lock: 0xce63ef20, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 [ 5668.772277] CPU: 0 PID: 9745 Comm: kworker/u2:3 Tainted: G W 4.12.0-03002-gec979a4-dirty #40 [ 5668.772796] Hardware name: Nokia RX-51 board [ 5668.773071] Workqueue: phy1 wl1251_irq_work [ 5668.773345] [<c010c9e4>] (unwind_backtrace) from [<c010a274>] (show_stack+0x10/0x14) [ 5668.773803] [<c010a274>] (show_stack) from [<c01545a4>] (do_raw_spin_lock+0x6c/0xa0) [ 5668.774230] [<c01545a4>] (do_raw_spin_lock) from [<c06ca578>] (_raw_spin_lock_irqsave+0x10/0x18) [ 5668.774658] [<c06ca578>] (_raw_spin_lock_irqsave) from [<c048c010>] (wl1251_op_tx+0x38/0x5c) [ 5668.775115] [<c048c010>] (wl1251_op_tx) from [<c06a12e8>] (ieee80211_tx_frags+0x188/0x1c0) [ 5668.775543] [<c06a12e8>] (ieee80211_tx_frags) from [<c06a138c>] (__ieee80211_tx+0x6c/0x130) [ 5668.775970] [<c06a138c>] (__ieee80211_tx) from [<c06a3dbc>] (ieee80211_tx+0xdc/0x104) [ 5668.776367] [<c06a3dbc>] (ieee80211_tx) from [<c06a4af0>] (__ieee80211_subif_start_xmit+0x454/0x8c8) [ 5668.776824] [<c06a4af0>] (__ieee80211_subif_start_xmit) from [<c06a4f94>] (ieee80211_subif_start_xmit+0x30/0x2fc) [ 5668.777343] [<c06a4f94>] (ieee80211_subif_start_xmit) from [<c0578848>] (dev_hard_start_xmit+0x80/0x118) ... by adding the missing spin_lock_init(). Reported-by: Pavel Machek <pavel@xxxxxx> Cc: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Signed-off-by: Cong Wang <xiyou.wangcong@xxxxxxxxx> Acked-by: Pavel Machek <pavel@xxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Signed-off-by: Pavel Machek <pavel@xxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/ti/wl1251/main.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/wireless/ti/wl1251/main.c +++ b/drivers/net/wireless/ti/wl1251/main.c @@ -1571,6 +1571,7 @@ struct ieee80211_hw *wl1251_alloc_hw(voi wl->state = WL1251_STATE_OFF; mutex_init(&wl->mutex); + spin_lock_init(&wl->wl_lock); wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE; wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE; Patches currently in stable-queue which might be from xiyou.wangcong@xxxxxxxxx are queue-4.9/wl1251-add-a-missing-spin_lock_init.patch