Lorenzo Bianconi <lorenzo@xxxxxxxxxx> wrote:
> Fix following schedule while atomic in mt76x02_reset_state
> since synchronize_rcu is run inside a RCU section
>
> [44036.944222] mt76x2e 0000:06:00.0: MCU message 31 (seq 3) timed out
> [44036.944281] BUG: sleeping function called from invalid context at kernel/rcu/tree_exp.h:818
> [44036.944284] in_atomic(): 1, irqs_disabled(): 0, pid: 28066, name: kworker/u4:1
> [44036.944287] INFO: lockdep is turned off.
> [44036.944292] CPU: 1 PID: 28066 Comm: kworker/u4:1 Tainted: G W 5.0.0-rc7-wdn-t1+ #7
> [44036.944294] Hardware name: Dell Inc. Studio XPS 1340/0K183D, BIOS A11 09/08/2009
> [44036.944305] Workqueue: phy1 mt76x02_wdt_work [mt76x02_lib]
> [44036.944308] Call Trace:
> [44036.944317] dump_stack+0x67/0x90
> [44036.944322] ___might_sleep.cold.88+0x9f/0xaf
> [44036.944327] rcu_blocking_is_gp+0x13/0x50
> [44036.944330] synchronize_rcu+0x17/0x80
> [44036.944337] mt76_sta_state+0x138/0x1d0 [mt76]
> [44036.944349] mt76x02_wdt_work+0x1c9/0x610 [mt76x02_lib]
> [44036.944355] process_one_work+0x2a5/0x620
> [44036.944361] worker_thread+0x35/0x3e0
> [44036.944368] kthread+0x11c/0x140
> [44036.944376] ret_from_fork+0x3a/0x50
> [44036.944384] BUG: scheduling while atomic: kworker/u4:1/28066/0x00000002
> [44036.944387] INFO: lockdep is turned off.
> [44036.944389] Modules linked in: cmac ctr ccm af_packet snd_hda_codec_hdmi
>
> Introduce __mt76_sta_remove in order to run sta_remove without holding dev->mutex.
> Move __mt76_sta_remove outside of RCU section in mt76x02_reset_state
>
> Fixes: e4ebb8b403d1 ("mt76: mt76x2: implement full device restart on watchdog reset")
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Patch applied to wireless-drivers.git, thanks.
13f61dfc5235 mt76: fix schedule while atomic in mt76x02_reset_state
--
https://patchwork.kernel.org/patch/10847437/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
