linux-kernel - Re: [PATCH v1] dmaengine: idxd: drain ATS translations when disabling WQ

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Message-Id: <176062693527.525215.1212282983221053178.b4-ty@kernel.org>
Date: Thu, 16 Oct 2025 20:32:15 +0530
From: Vinod Koul <vkoul@...nel.org>
To: dmaengine@...r.kernel.org, 
 Vinicius Costa Gomes <vinicius.gomes@...el.com>
Cc: dave.jiang@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] dmaengine: idxd: drain ATS translations when
 disabling WQ


On Tue, 30 Sep 2025 18:22:26 -0700, Vinicius Costa Gomes wrote:
> There's an errata[1], for the Disable WQ command that it
> does not guaranteee that address translations are drained. If WQ
> configuration is updated, pending address translations can use an
> updated WQ configuration, resulting an invalid translation response
> that is cached in the device translation cache.
> 
> Replace the Disable WQ command with a Drain WQ command followed by a
> Reset WQ command, this guarantees that all ATS translations are
> drained from the device before changing WQ configuration.
> 
> [...]

Applied, thanks!

[1/1] dmaengine: idxd: drain ATS translations when disabling WQ
      commit: f80ea8566917c4bb680911db839a170873e5d17c

Best regards,
-- 
~Vinod