linux-kernel - RE: [PATCH v4 3/3] scsi: ufs-bsg: Allow reading descriptors

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Message-ID: <SN6PR04MB4925C574E60B3BA44DD6E0A0FC6E0@SN6PR04MB4925.namprd04.prod.outlook.com>
Date:   Tue, 5 Feb 2019 12:07:25 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     "Martin K. Petersen" <martin.petersen@...cle.com>
CC:     "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        SCSI <linux-scsi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Avi Shchislowski <Avi.Shchislowski@....com>,
        Alex Lemberg <Alex.Lemberg@....com>,
        Evan Green <evgreen@...omium.org>
Subject: RE: [PATCH v4 3/3] scsi: ufs-bsg: Allow reading descriptors

Martin,
Any further comments?

Thanks,
Avri


> -----Original Message-----
> From: Evan Green <evgreen@...omium.org>
> Sent: Monday, January 28, 2019 8:42 PM
> To: Avri Altman <Avri.Altman@....com>
> Cc: James E.J. Bottomley <jejb@...ux.vnet.ibm.com>; Martin K. Petersen
> <martin.petersen@...cle.com>; SCSI <linux-scsi@...r.kernel.org>; LKML
> <linux-kernel@...r.kernel.org>; Avi Shchislowski <Avi.Shchislowski@....com>;
> Alex Lemberg <Alex.Lemberg@....com>
> Subject: Re: [PATCH v4 3/3] scsi: ufs-bsg: Allow reading descriptors
> 
> On Sat, Jan 26, 2019 at 11:08 PM Avri Altman <avri.altman@....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@....com>
> 
> Reviewed-by: Evan Green <evgreen@...omium.org>