Re: [PATCH v6 5/9] drm/panthor: Get rid of panthor_group::fatal_lock

[Boris Brezillon]

On Mon, 17 Aug 2026 16:12:22 +0100
Steven Price <steven.price@xxxxxxx> wrote:

> On 11/08/2026 12:23, Boris Brezillon wrote:
> > This lock is never used, and we're about to make fatal_queues an
> > atomic to cope with concurrent updates.
> > 
> > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>  
> 
> Reviewed-by: Steven Price <steven.price@xxxxxxx>
> 
> Although it does make me wonder if there's a fix that needs backporting...

I've audited all places where this field is accessed, and I think we're
covered by the panthor_scheduler::lock. The only place where this is
not the case is group_term_post_processing(), and I believe the
fatal_queues value is frozen at this point (can't be updated by IRQ
logic because the group has left its CSG slot).