linux-kernel - Re: [PATCH ath-next v4 9/9] wifi: ath12k: reset MLO global memory during recovery

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Message-ID: <432f80c3-0f9a-133b-5447-a8e2cee5479e@quicinc.com>
Date: Tue, 8 Apr 2025 15:30:09 +0530
From: Vasanthakumar Thiagarajan <quic_vthiagar@...cinc.com>
To: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>,
        Johannes Berg
	<johannes@...solutions.net>,
        Jeff Johnson <jjohnson@...nel.org>,
        "Karthikeyan
 Periyasamy" <quic_periyasa@...cinc.com>,
        Kalle Valo <kvalo@...nel.org>, Harshitha Prem <quic_hprem@...cinc.com>
CC: Jeff Johnson <jeff.johnson@....qualcomm.com>,
        <linux-wireless@...r.kernel.org>, <ath12k@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH ath-next v4 9/9] wifi: ath12k: reset MLO global memory
 during recovery



On 4/8/2025 11:36 AM, Aditya Kumar Singh wrote:
> When operating with multiple devices grouped together, the firmware stores
> data related to the state machine of each partner device in the MLO global
> memory region. If the firmware crashes, it updates the state to 'crashed'.
> During recovery, this memory is shared with the firmware again, and upon
> detecting the 'crashed' state, it reasserts. This leads to a loop of
> firmware asserts and it never recovers.
> 
> Hence to fix this issue,  once all devices in the group have been asserted
> and powered down, reset the MLO global memory region.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
> 
> Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>