linux-kernel - Re: [PATCH V5 2/2] scsi: ufs: Add configfs support for ufs provisioning

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Message-ID: <4964583a-d13f-7b92-9838-e4398ec8c682@codeaurora.org>
Date:   Wed, 11 Jul 2018 15:20:06 +0530
From:   Sayali Lokhande <sayalil@...eaurora.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     subhashj@...eaurora.org, cang@...eaurora.org,
        vivek.gautam@...eaurora.org, rnayak@...eaurora.org,
        vinholikatti@...il.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com, asutoshd@...eaurora.org,
        evgreen@...omium.org, riteshh@...eaurora.org,
        linux-scsi@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V5 2/2] scsi: ufs: Add configfs support for ufs
 provisioning



On 7/9/2018 1:51 AM, Christoph Hellwig wrote:
> On Fri, Jul 06, 2018 at 11:50:40AM +0530, Sayali Lokhande wrote:
>> This patch adds configfs support to provision ufs device at
>> runtime. This feature can be primarily useful in factory or
>> assembly line as some devices may be required to be configured
>> multiple times during initial system development phase.
>> Configuration Descriptors can be written multiple times until
>> bConfigDescrLock attribute is zero.
>>
>> Configuration descriptor buffer consists of Device and Unit
>> descriptor configurable parameters which are parsed from vendor
>> specific provisioning file and then passed via configfs node at
>> runtime to provision ufs device.
>> CONFIG_CONFIGFS_FS needs to be enabled for using this feature.
> As mentioned before:  this absolutely needs to be a separate
> config option so that the code can be compiled out entirely.
Agree. Will add separate config for UFS Provision and set it dependent 
on CONFIGFS_FS