linux-kernel - Re: [PATCH] wifi: ath11k: fix rx completion meta data corruption

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Message-ID: <5d872cf0-ca57-4017-b06e-fce9c11813dc@oss.qualcomm.com>
Date: Mon, 24 Mar 2025 08:03:15 -0700
From: Jeff Johnson <jeff.johnson@....qualcomm.com>
To: Johan Hovold <johan+linaro@...nel.org>, Jeff Johnson <jjohnson@...nel.org>
Cc: Miaoqing Pan <quic_miaoqing@...cinc.com>,
        Steev Klimaszewski <steev@...i.org>,
        Clayton Craft <clayton@...ftyguy.net>,
        Jens Glathe <jens.glathe@...schoolsolutions.biz>,
        ath11k@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] wifi: ath11k: fix rx completion meta data corruption

On 3/21/2025 7:53 AM, Johan Hovold wrote:
> Add the missing memory barrier to make sure that the REO dest ring
> descriptor is read after the head pointer to avoid using stale data on
> weakly ordered architectures like aarch64.
> 
> This may fix the ring-buffer corruption worked around by commit
> f9fff67d2d7c ("wifi: ath11k: Fix SKB corruption in REO destination
> ring") by silently discarding data, and may possibly also address user
> reported errors like:
> 
> 	ath11k_pci 0006:01:00.0: msdu_done bit in attention is not set
> 
> Tested-on: WCN6855 hw2.1 WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.41
> 
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Cc: stable@...r.kernel.org	# 5.6
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=218005
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Does this supersede:
[PATCH] wifi: ath11k: fix ring-buffer corruption