# Re: \[PATCH 1/3\] ath9k: add option to reset the wifi chip via debugfs

- From: Kalle Valo \<hidden\>
- Date: 2021-10-05 14:27:53 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/10/1531680
- Thread: https://ratatoskr.run/linux-wireless/2021/09/1508468/t.md

```text
Linus Lüssing [ref] wrote:

> Sometimes, in yet unknown cases the wifi chip stops working. To allow a
> watchdog in userspace to easily and quickly reset the wifi chip, add the
> according functionality to userspace. A reset can then be triggered
> via:
> 
>   $ echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/reset
> 
> The number of user resets can further be tracked in the row "User reset"
> in the same file.
> 
> So far people usually used "iw scan" to fix ath9k chip hangs from
> userspace. Which triggers the ath9k_queue_reset(), too. The reset file
> however has the advantage of less overhead, which makes debugging bugs
> within ath9k_queue_reset() easier.
> 
> Signed-off-by: Linus Lüssing <redacted>
> Signed-off-by: Kalle Valo <redacted>

2 patches applied to ath-next branch of ath.git, thanks.

053f9852b95e ath9k: add option to reset the wifi chip via debugfs
4925642d5412 ath9k: Fix potential interrupt storm on queue reset

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210914192515.9273-2-linus.luessing@c0d3.blue/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

```