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

[Steven Price <steven.price@arm.com>]

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@collabora.com>

Reviewed-by: Steven Price <steven.price@arm.com>

Although it does make me wonder if there's a fix that needs backporting...

Thanks,
Steve

> ---
>  drivers/gpu/drm/panthor/panthor_sched.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
> index baa06731797c..9adf1e21eb83 100644
> --- a/drivers/gpu/drm/panthor/panthor_sched.c
> +++ b/drivers/gpu/drm/panthor/panthor_sched.c
> @@ -565,9 +565,6 @@ struct panthor_group {
>  	/** @idle_queues: Bitmask reflecting the idle queues. */
>  	u32 idle_queues;
>  
> -	/** @fatal_lock: Lock used to protect access to fatal fields. */
> -	spinlock_t fatal_lock;
> -
>  	/** @fatal_queues: Bitmask reflecting the queues that hit a fatal exception. */
>  	u32 fatal_queues;
>  
> @@ -3675,7 +3672,6 @@ int panthor_group_create(struct panthor_file *pfile,
>  	if (!group)
>  		return -ENOMEM;
>  
> -	spin_lock_init(&group->fatal_lock);
>  	kref_init(&group->refcount);
>  	group->state = PANTHOR_CS_GROUP_CREATED;
>  	group->csg_id = -1;
>