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

[Bean Huo (beanhuo)]

>-----Original Message-----
>From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi-
>owner@xxxxxxxxxxxxxxx] On Behalf Of Avri Altman
>Sent: Sunday, January 27, 2019 8:08 AM
>To: James E.J. Bottomley <jejb@xxxxxxxxxxxxxxxxxx>; Martin K. Petersen
><martin.petersen@xxxxxxxxxx>; linux-scsi@xxxxxxxxxxxxxxx; linux-
>kernel@xxxxxxxxxxxxxxx; Evan Green <evgreen@xxxxxxxxxxxx>
>Cc: Avi Shchislowski <avi.shchislowski@xxxxxxx>; Alex Lemberg
><alex.lemberg@xxxxxxx>; Avri Altman <avri.altman@xxxxxxx>
>Subject: [EXT] [PATCH v4 3/3] scsi: ufs-bsg: Allow reading descriptors
>
>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@xxxxxxx>
Reviewed-by: Bean Huo <beanhuo@xxxxxxxxxx>