Re: [PATCH v7 08/19] scsi: detect support for command duration limits

[Diangang Li <lidiangang@bytedance.com>]

On Tue, Jul 22, 2025 at 06:37:50PM +0900, Damien Le Moal wrote:
> On 7/22/25 6:32 PM, Friedrich Weber wrote:
> > On 14/07/2025 04:48, Damien Le Moal wrote:
> >> On 7/10/25 5:41 PM, Friedrich Weber wrote:
> >>> Thanks for looking into this, it is definitely a strange problem.
> >>>
> >>> Considering these drives don't support CDL anyway: Do you think it would
> >>> be possible to provide an "escape hatch" to disable only the CDL checks
> >>> (a module parameter?) so hotplug can work for the user again for their
> >>> device? If I see correctly, disabling just the CDL checks is not
> >>> possible (without recompiling the kernel) -- scsi_mod.dev_flags can be
> >>> used to disable RSOC, but I guess that has other unintended consequences
> >>> too, so a more "targeted" escape hatch would be nice.
> >>
> >> Could you test the attached patch ? That should solve the issue.
> >>
> > 
> > Thanks for the patch! The user tested it on top of a 6.15.6 kernel and
> > with the SAS3008 HBA, and indeed:
> > 
> > - under 6.15.6, hotplug fails with the log messages mentioned in my
> > first message,
> > - with your patch on top, hotplug works again.
> 
> OK. Will post a proper patch then (tomorrow).
> Thanks for testing.
>

Hi Damien,

Are you planning to post a formal patch to upstream?
 
> 
> -- 
> Damien Le Moal
> Western Digital Research