Re: [PATCH]: Flexible timeout infrastructure

[Luben Tuikov <luben_tuikov@adaptec.com>]

> Could we get the eh_times_out part of the patch broken out as the
> addition of the return values look like a good idea along with some
> method to call a modified version of scsi_done through a exported
> function to the LLDD.

Hm, yes, I saw the thread back in January I believe it was on this.

Basically I want to keep queuecommand() and scsi_done()
pretty much unchanged -- being antagonists of each other.

SAM 5.4 describes that interface (SCSI Core <--> LLDD) and
SAM 5.1 describes Application Client <--> SCSI Core.

We seem on track with 5.4 and I'd rather not overload
scsi_done().

Note that this patch would be a lot _less_ intrusive than the
one propsed in January, as the one proposed in January
discloses the internals of SCSI Core to LLDD, via
the scsi midlayer scsi_eh_scmd_add() method which
drivers would be supposed to call.
http://marc.theaimsgroup.com/?l=linux-scsi&m=107461451911771&w=2

I'd rather all this information be conveyed through
the Service Response and Status Code values to be
returned to SCSI Core from the LLDD via scsi_done(), in
the scsi command structure.

Then SCSI Core makes the decision, as to what is to be
done with the command.

This patch is very small and non-intrusive with 0 effects
to any LLDD or SCSI Core.

-- 
Luben