linux-kernel - Re: [RFC PATCH v3 2/3] PCI: rockchip-host: Retry link training on failure without PERST#

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Message-ID: <aN-dtHxYTspw3rvQ@geday>
Date: Fri, 3 Oct 2025 06:56:04 -0300
From: Geraldo Nascimento <geraldogabriel@...il.com>
To: Shawn Lin <shawn.lin@...k-chips.com>
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Heiko Stuebner <heiko@...ech.de>, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org
Subject: Re: [RFC PATCH v3 2/3] PCI: rockchip-host: Retry link training on
 failure without PERST#

On Fri, Jul 18, 2025 at 11:46:33AM +0800, Shawn Lin wrote:
> 在 2025/07/18 星期五 11:33, Geraldo Nascimento 写道:
> > 
> > Also, since you're asking me to test some code, I think it is only fair
> > if I ask you to test my code, too. It shouldn't be too hard for you to
> > find a otherwise working NVMe SSD that refuses to complete link training
> > with current code. Connect this SSD please to a RK3399 board and let us
> > know if my proposed code change does anything to ameliorate the
> > long-standing issue of SSD that refuses to cooperate.
> 
> Sure, I don't have Samsung PM981a SSD now, but I could try to test all
> my SSDs to find if I could pick up one that won't work.
>

Hi Shawn,

Haven't heard back from you so I assume you tested with SSD that should
work but does not and that the test failed?

Thanks,
Geraldo Nascimento