Re: [PATCH 09/11] drm/panthor: Fix a leak when a group is evicted before the tiler OOM is serviced

[Liviu Dudau <liviu.dudau@arm.com>]

On Thu, Jun 25, 2026 at 02:40:35PM +0200, Boris Brezillon wrote:
> A group ref is tied to the pending tiler_oom_work, so we need to release
> it if the cancel was effective.
> 
> Fixes: de8548813824 ("drm/panthor: Add the scheduler logical block")
> Reported-by: sashiko-bot@kernel.org
> Closes: https://sashiko.dev/#/patchset/20260623-panthor-signal-from-irq-v3-0-2ece396f8ee0@collabora.com?part=7
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>

Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>

Best regards,
Liviu

> ---
>  drivers/gpu/drm/panthor/panthor_sched.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
> index ab3e13e44a26..5fe95d03f23e 100644
> --- a/drivers/gpu/drm/panthor/panthor_sched.c
> +++ b/drivers/gpu/drm/panthor/panthor_sched.c
> @@ -1057,7 +1057,8 @@ group_unbind_locked(struct panthor_group *group)
>  
>  	/* Tiler OOM events will be re-issued next time the group is scheduled. */
>  	atomic_set(&group->tiler_oom, 0);
> -	cancel_work(&group->tiler_oom_work);
> +	if (cancel_work(&group->tiler_oom_work))
> +		group_put(group);
>  
>  	for (u32 i = 0; i < group->queue_count; i++)
>  		group->queues[i]->doorbell_id = -1;
> 
> -- 
> 2.54.0
> 

-- 
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