linux-kernel - Re: [PATCH v2 0/4] rpmb subsystem, uapi and virtio-rpmb driver

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Message-ID: <b95bdfa9-4373-8f54-677e-4a764061c61c@acm.org>
Date:   Wed, 6 Apr 2022 13:20:58 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Bean Huo <huobean@...il.com>,
        Alex Bennée <alex.bennee@...aro.org>
Cc:     linux-kernel@...r.kernel.org, maxim.uvarov@...aro.org,
        joakim.bech@...aro.org, ulf.hansson@...aro.org,
        ilias.apalodimas@...aro.org, arnd@...aro.org,
        ruchika.gupta@...aro.org, tomas.winkler@...el.com,
        yang.huang@...el.com, bing.zhu@...el.com,
        Matti.Moell@...nsynergy.com, hmo@...nsynergy.com,
        linux-mmc@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH v2 0/4] rpmb subsystem, uapi and virtio-rpmb driver

On 4/6/22 11:12, Bean Huo wrote:
> It is from the ufs-utils.
> 
> So, do you vote to add the UFS RPMB driver based on this new framework
> to resolve this conflict?

Are any applications using the RPMB code from ufs-utils? It seems to me 
that the ufs-utils code doe not handle SCSI unit attentions correctly. 
If a POWER ON unit attention is received as reply to a SECURITY PROTOCOL 
OUT transaction, the write counter should be reread instead of retrying 
the SECURITY PROTOCOL OUT command with the same write counter.

Regarding adding a UFS RPMB driver: that seems useful to me since 
multiple applications make use of the UFS RPMB functionality. My 
understanding is that currently storageproxyd multiplexes UFS RPMB 
accesses in Android.

Thanks,

Bart.