Re: [PATCH v6 2/3] PCI: rockchip-host: do not attempt 5.0 GT/s retraining

[sashiko-bot@kernel.org]

> Drop the 5.0 GT/s Link Speed retraining from Rockchip PCIe Root
> Complex Mode Operation, so called host driver.
> 
> The reason is that Shawn Lin from Rockchip has reiterated that there
> may be danger of "catastrophic failure" in using their PCIe with
> 5.0GT/s speeds.
> 
> While Rockchip has done so informally without issuing a proper errata,
> and the particulars are thus unknown, this may cause data loss or
> worse.
> 
> This change is corroborated by RK3399 official datasheet [1], which
> states maximum link speed for this platform is 2.5 GT/s.
> 
> [1] https://opensource.rock-chips.com/images/d/d7/Rockchip_RK3399_Datasheet_V2.1-20200323.pdf
> 
> Link: https://lore.kernel.org/all/ffd05070-9879-4468-94e3-b88968b4c21b@rock-chips.com/
> Cc: stable@vger.kernel.org
> Reported-by: Dragan Simic <dsimic@manjaro.org>
> Reported-by: Shawn Lin <shawn.lin@rock-chips.com>
> Signed-off-by: Geraldo Nascimento <geraldogabriel@gmail.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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