Re: [PATCH v3 1/1] ufs: core: Expand MCQ queue slot to DeviceQueueDepth + 1

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To: <naomi.chu@xxxxxxxxxxxx>
Subject: Re: [PATCH v3 1/1] ufs: core: Expand MCQ queue slot to DeviceQueueDepth + 1
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Wed, 08 Nov 2023 21:35:53 -0500
Cc: <linux-scsi@xxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, <linux-mediatek@xxxxxxxxxxxxxxxxxxx>, Alim Akhtar <alim.akhtar@xxxxxxxxxxx>, Avri Altman <avri.altman@xxxxxxx>, Bart Van Assche <bvanassche@xxxxxxx>, "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Matthias Brugger <matthias.bgg@xxxxxxxxx>, AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>, Manivannan Sadhasivam <mani@xxxxxxxxxx>, Asutosh Das <quic_asutoshd@xxxxxxxxxxx>, Can Guo <quic_cang@xxxxxxxxxxx>, <wsd_upstream@xxxxxxxxxxxx>, <peter.wang@xxxxxxxxxxxx>, <casper.li@xxxxxxxxxxxx>, <powen.kao@xxxxxxxxxxxx>, <alice.chao@xxxxxxxxxxxx>, <chun-hung.wu@xxxxxxxxxxxx>, <cc.chou@xxxxxxxxxxxx>, <eddie.huang@xxxxxxxxxxxx>
In-reply-to: <20231102052426.12006-2-naomi.chu@mediatek.com> (naomi chu's message of "Thu, 2 Nov 2023 13:24:24 +0800")
Organization: Oracle Corporation

> The UFSHCI 4.0 specification mandates that there should always be at
> least one empty slot in each queue for distinguishing between full and
> empty states. Enlarge the `hwq->max_entries` to `DeviceQueueDepth +1`
> to allow UFSHCI 4.0 controllers to fully utilize MCQ queue slots.

Applied to 6.7/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- [PATCH v3 0/1] ufs: core: Expand MCQ queue slot to DeviceQueueDepth + 1
  - From: naomi.chu
- [PATCH v3 1/1] ufs: core: Expand MCQ queue slot to DeviceQueueDepth + 1
  - From: naomi.chu

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