linux-kernel - Re: [PATCH V4] ahci: Marvell 88SE9215 controllers prefer DMA for ATAPI

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Message-Id: <174229564547.1892572.8787195454245116821.b4-ty@kernel.org>
Date: Tue, 18 Mar 2025 12:00:45 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Damien Le Moal <dlemoal@...nel.org>, 
 Huacai Chen <chenhuacai@...nel.org>
Cc: linux-ide@...r.kernel.org, Huacai Chen <chenhuacai@...nel.org>, 
 Xuerui Wang <kernel@...0n.name>, Daniel Kral <d.kral@...xmox.com>, 
 linux-kernel@...r.kernel.org, Yuli Wang <wangyuli@...ontech.com>, 
 Jie Fan <fanjie@...ontech.com>, Erpeng Xu <xuerpeng@...ontech.com>
Subject: Re: [PATCH V4] ahci: Marvell 88SE9215 controllers prefer DMA for
 ATAPI

On Tue, 18 Mar 2025 18:43:14 +0800, Huacai Chen wrote:
> We use CD/DVD drives under Marvell 88SE9215 SATA controller on many
> Loongson-based machines. We found its PIO doesn't work well, and on the
> opposite its DMA seems work very well.
> 
> We don't know the detail of the 88SE9215 SATA controller, but we have
> tested different CD/DVD drives and they all have problems under 88SE9215
> (but they all work well under an Intel SATA controller). So, we consider
> this problem is bound to 88SE9215 SATA controller rather than bound to
> CD/DVD drives.
> 
> [...]

Applied to libata/linux.git (for-6.15), thanks!

[1/1] ahci: Marvell 88SE9215 controllers prefer DMA for ATAPI
      https://git.kernel.org/libata/linux/c/0507c777

Kind regards,
Niklas