Re: [PATCH 1/2] scsi: core: Add support for reserved tags

[Bart Van Assche <bvanassche@acm.org>]

On 11/9/21 10:59 PM, Hannes Reinecke wrote:
> This is essentially the same patch as I posted a while ago (cf 
> https://lore.kernel.org/linux-scsi/20210222132405.91369-1- hare@suse.de/).
> 
> But there had been push-back on that series as it would also try to use 
> a scsi host device for driver-internal commands.
> 
> Maybe we should combine our efforts; patch 2 is equivalent to your 
> patch, and 3-5 are a conversion of the fnic driver to use those 
> commands. So we should merge our efforts to get this thing off the ground.
> 
> For the remainder of the patchset I'm currently working on a solution to 
> address the upstream concerns.

Hi Hannes,

In the UFS driver we are using a request queue that is not associated 
with any SCSI device for allocating driver-internal tags from the same 
tags space as SCSI commands. Is this a solution that is generic enough 
to be re-used by other SCSI drivers? See also the output of git grep -nH 
'hba->cmd_queue'.

Thanks,

Bart.