[PATCH] wifi: ath11k: reduce the MHI timeout to 20s

[Kalle Valo]

Kalle Valo <kvalo at kernel.org> wrote:

> From: Kalle Valo <quic_kvalo at quicinc.com>
> 
> Currently ath11k breaks after hibernation, the reason being that ath11k expects
> that the wireless device will have power during suspend and the firmware will
> continue running. But of course during hibernation the power from the device is
> cut off and firmware is not running when resuming, so ath11k will fail.
> 
> (The reason why ath11k needs the firmware running is the interaction between
> mac80211 and MHI stack, it's a long story and more info in the bugzilla report.)
> 
> In SUSE kernels the watchdog timeout is reduced from the default 120 to 60 seconds:
> 
> CONFIG_DPM_WATCHDOG_TIMEOUT=60
> 
> But as the ath11k MHI timeout is 90 seconds the kernel will crash before will
> ath11k will recover in resume callback. To avoid the crash reduce the MHI
> timeout to just 20 seconds.
> 
> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.9
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=214649
> Signed-off-by: Kalle Valo <quic_kvalo at quicinc.com>

Patch applied to wireless.git, thanks.

cf5fa3ca0552 wifi: ath11k: reduce the MHI timeout to 20s

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20230329162038.8637-1-kvalo@kernel.org/

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