From: sashiko-bot@kernel.org
To: "Aditya Garg" <aditya.garg@linux.dev>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] wifi: brcmfmac: map msgbuf RX packet IDs bidirectional
Date: Wed, 21 Oct 2026 17:26:53 +0000 [thread overview]
Message-ID: <sashiko-outbox-180523@kernel.org> (raw)
In-Reply-To: <20261021172238.10004-1-aditya.garg@linux.dev>
> From: Jason Perlow <jperlow@gmail.com>
>
> Commit f0ba5fd51ff2 ("wifi: brcmfmac: Set DMA direction for msgbuf
> packet IDs") maps the RX packet ID buffers DMA_FROM_DEVICE. The
> BCM4364 firmware also reads posted RX buffers, so with VT-d
> translation enabled every such read faults ("PTE Read access is not
> set") and the firmware crashes and resets in a loop.
>
> Map the RX pool DMA_BIDIRECTIONAL again, as before that commit. TX
> keeps DMA_TO_DEVICE.
>
> Fixes: f0ba5fd51ff2 ("wifi: brcmfmac: Set DMA direction for msgbuf packet IDs")
> Cc: stable@vger.kernel.org
> Signed-off-by: Jason Perlow <jperlow@gmail.com>
> Signed-off-by: Aditya Garg <aditya.garg@linux.dev>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261021172238.10004-1-aditya.garg@linux.dev?part=1
next prev parent reply other threads:[~2026-10-21 17:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 17:22 [PATCH] wifi: brcmfmac: map msgbuf RX packet IDs bidirectional Aditya Garg
2026-10-21 17:26 ` sashiko-bot [this message]
2026-10-21 17:54 ` Arend van Spriel
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