Commit 189e0fb7 authored by Christian König's avatar Christian König Committed by Alex Deucher

drm/amdgpu: RCU protected amd_sched_fence_release

Fences must be freed RCU protected, otherwise the reservation_object_*_rcu()
functions can run into problems.
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b4413535
......@@ -84,12 +84,33 @@ static bool amd_sched_fence_enable_signaling(struct fence *f)
return true;
}
static void amd_sched_fence_release(struct fence *f)
/**
* amd_sched_fence_free - free up the fence memory
*
* @rcu: RCU callback head
*
* Free up the fence memory after the RCU grace period.
*/
static void amd_sched_fence_free(struct rcu_head *rcu)
{
struct fence *f = container_of(rcu, struct fence, rcu);
struct amd_sched_fence *fence = to_amd_sched_fence(f);
kmem_cache_free(sched_fence_slab, fence);
}
/**
* amd_sched_fence_release - callback that fence can be freed
*
* @fence: fence
*
* This function is called when the reference count becomes zero.
* It just RCU schedules freeing up the fence.
*/
static void amd_sched_fence_release(struct fence *f)
{
call_rcu(&f->rcu, amd_sched_fence_free);
}
const struct fence_ops amd_sched_fence_ops = {
.get_driver_name = amd_sched_fence_get_driver_name,
.get_timeline_name = amd_sched_fence_get_timeline_name,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment