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Date: Wed, 20 Dec 2023 11:30:40 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Chunfeng Yun <chunfeng.yun@...iatek.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Mathias Nyman <mathias.nyman@...el.com>, linux-usb@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Eddie Hung <eddie.hung@...iatek.com>, Macpaul Lin
<macpaul.lin@...iatek.com>, stable@...r.kernel.org
Subject: Re: [PATCH v3 2/3] usb: xhci-mtk: fix a short packet issue of gen1
isoc-in transfer
Il 20/12/23 03:58, Chunfeng Yun ha scritto:
> For Gen1 isoc-in transfer, host still send out unexpected ACK after device
> finish the burst with a short packet, this will cause an exception on the
> connected device, such as, a usb 4k camera.
> It can be fixed by setting rxfifo depth less than 4k bytes, prefer to use
> 3k here, the side-effect is that may cause performance drop about 10%,
> including bulk transfer.
>
> Fixes: 926d60ae64a6 ("usb: xhci-mtk: modify the SOF/ITP interval for mt8195")
> Cc: stable@...r.kernel.org
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
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