Re: [PATCH] scsi: core: Add BLIST_NO_ASK_VPD_SIZE for some VDASD

[Martin Wilck]

On Wed, 2022-09-28 at 11:13 -0700, Lee Duncan wrote:
> From: Lee Duncan <lduncan@xxxxxxxx>
> 
> Some storage, such as AIX VDASD (virtual storage) and IBM 2076
> (front end) do not like the recent commit:
> 
> commit c92a6b5d6335 ("scsi: core: Query VPD size before getting full
> page")
> 
> That commit changed getting SCSI VPD pages so that we now read
> just enough of the page to get the actual page size, then read
> the whole page in a second read. The problem is that the above
> mentioned hardware returns zero for the page size, because of
> a firmware error. In such cases, until the firmware is fixed,
> this new black flag says to revert to the original method of
> reading the VPD pages, i.e. try to read as a whole buffer's
> worth on the first try.
> 
> Fixes: c92a6b5d6335 ("scsi: core: Query VPD size before getting full
> page")
> Reported-by: Martin Wilck <mwilck@xxxxxxxx>
> Suggested-by: Hannes Reinecke <hare@xxxxxxx>
> Signed-off-by: Lee Duncan <lduncan@xxxxxxxx>

Reviewed-by: Martin Wilck <mwilck@xxxxxxxx>