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

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Date:   Sun, 8 Jul 2018 13:21:36 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Sayali Lokhande <sayalil@...eaurora.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 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.