Re: [PATCH V2] mpt3sas: support target smid for [abort|query] task

[Minwoo Im]

On 19-07-23 16:57:49, Sreekanth Reddy wrote:
> On Mon, Jul 15, 2019 at 11:43 AM Hannes Reinecke <hare@xxxxxxx> wrote:
> > I think this is fundamentally wrong.
> > ABORT_TASK is used to abort a single task, which of course has to be
> > known beforehand. If you don't know the task, what exactly do you hope
> > to achieve here? Aborting random I/O?
> > Or, even worse, aborting I/O the driver uses internally and corrupt the
> > internal workflow of the driver?
> >
> > We should simply disallow any ABORT TASK from userspace if the TaskMID
> > is zero. And I would even argue to disabllow ABORT TASK from userspace
> > completely, as the smid is never relayed to userland, and as such the
> > user cannot know which task should be aborted.
> 
> Hannes,
> 
> This interface was added long time back in mpt2sas driver and I don't
> have exact reason of adding this interface at that time.
> But I know that this interface is still used by BRCM test team & few
> customers only for some functionality and regression testing.

Sreekanth, and Hannes,

Could you please give some review points on this?

Thanks,