Re: [PATCH] make the SCSI mid-layer obey the device online flag

[Luben Tuikov <tluben@rogers.com>]

Christoph Hellwig wrote:
> On Fri, Jun 06, 2003 at 11:52:56AM -0400, Luben Tuikov wrote:
> 
>>>Thus, we allow any special command because we assume it's part of error
>>>handling (or post error clean up).
>>
>>So SCSI Core _has_ decided to know about ULP (block, tape, optical).
>>
>>Unless we (SCSI Core) generate those, it's a pickle to decide
>>which are ``special'' enough commands.  I think that we'll see
>>more user space drivers controlling devices via sg sending
>>commands to the device for exactly those kinds of problems...
>>Else the burden on SCSI Core will/might be too great.
> 
> 
> I think James means REQ_SPECIAL request.  But some of them aren't
> special enough so we might need another flag for those.  But
> having knowledge about the upper drivers in the core sounds like
> a really bad idea.

*If* eh is to be done in SCSI Core you just cannot avoid it --
this is *the whole point* which James had in mind to allow
to send cmnds if !online. (see prev msgs on this thread)

(More things I want to mention here on this, but 1. No time
(I'm late for a meeting) and 2. I see no point -- you'll manage
just fine.)

-- 
Luben