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From:   Evan Green <evgreen@chromium.org>
Date:   Mon, 28 Jan 2019 10:42:26 -0800
Message-ID: <CAE=gft6mLsW-iEBZ9pFRWWyDQz_gCs20_4JBoBzxL1tYv0rbYg@mail.gmail.com>
Subject: Re: [PATCH v4 3/3] scsi: ufs-bsg: Allow reading descriptors
To:     Avri Altman <avri.altman@wdc.com>
Cc:     "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        SCSI <linux-scsi@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Avi Shchislowski <avi.shchislowski@wdc.com>,
        Alex Lemberg <alex.lemberg@wdc.com>
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On Sat, Jan 26, 2019 at 11:08 PM Avri Altman <avri.altman@wdc.com> wrote:
>
> Add this functionality, placing the descriptor being read in the actual
> data buffer in the bio.
>
> That is, for both read and write descriptors query upiu, we are using
> the job's request_payload.  This in turn, is mapped back in user land to
> the applicable sg_io_v4 xferp: dout_xferp for write descriptor,
> and din_xferp for read descriptor.
>
> Signed-off-by: Avri Altman <avri.altman@wdc.com>

Reviewed-by: Evan Green <evgreen@chromium.org>