6.18-stable review patch. If anyone has any objections, please let me know.
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From: Ketil Johnsen ketil.johnsen@arm.com
[ Upstream commit 7051f6ba968fa69918d72cc26de4d6cf7ea05b90 ]
The function panthor_fw_unplug() will free the FW memory sections. The problem is that there could still be pending FW events which are yet not handled at this point. process_fw_events_work() can in this case try to access said freed memory.
Simply call disable_work_sync() to both drain and prevent future invocation of process_fw_events_work().
Signed-off-by: Ketil Johnsen ketil.johnsen@arm.com Fixes: de85488138247 ("drm/panthor: Add the scheduler logical block") Reviewed-by: Liviu Dudau liviu.dudau@arm.com Link: https://patch.msgid.link/20251027140217.121274-1-ketil.johnsen@arm.com Signed-off-by: Liviu Dudau liviu.dudau@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/panthor/panthor_sched.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c index a39f0fb370dc6..0279e19aadae9 100644 --- a/drivers/gpu/drm/panthor/panthor_sched.c +++ b/drivers/gpu/drm/panthor/panthor_sched.c @@ -3859,6 +3859,7 @@ void panthor_sched_unplug(struct panthor_device *ptdev) struct panthor_scheduler *sched = ptdev->scheduler;
cancel_delayed_work_sync(&sched->tick_work); + disable_work_sync(&sched->fw_events_work);
mutex_lock(&sched->lock); if (sched->pm.has_ref) {