[PATCH 1/2] drm/xe/vm: move rebind_work init earlier
Matthew Brost
matthew.brost at intel.com
Thu May 15 00:01:57 UTC 2025
On Wed, May 14, 2025 at 04:24:25PM +0100, Matthew Auld wrote:
> In xe_vm_close_and_put() we need to be able to call
> flush_work(rebind_work), however during vm creation we can call this on
> the error path, before having actually set up the worker, leading to a
> splat from flush_work().
>
> It looks like we can simply move the worker init step earlier to fix
> this.
>
> Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Matthew Brost <matthew.brost at intel.com>
Reviewed-by: Matthew Brost <matthew.brost at intel.com>
> Cc: <stable at vger.kernel.org> # v6.8+
> ---
> drivers/gpu/drm/xe/xe_vm.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
> index 5a978da411b0..168756fb140b 100644
> --- a/drivers/gpu/drm/xe/xe_vm.c
> +++ b/drivers/gpu/drm/xe/xe_vm.c
> @@ -1704,8 +1704,10 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags)
> * scheduler drops all the references of it, hence protecting the VM
> * for this case is necessary.
> */
> - if (flags & XE_VM_FLAG_LR_MODE)
> + if (flags & XE_VM_FLAG_LR_MODE) {
> + INIT_WORK(&vm->preempt.rebind_work, preempt_rebind_work_func);
> xe_pm_runtime_get_noresume(xe);
> + }
>
> vm_resv_obj = drm_gpuvm_resv_object_alloc(&xe->drm);
> if (!vm_resv_obj) {
> @@ -1750,10 +1752,8 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags)
> vm->batch_invalidate_tlb = true;
> }
>
> - if (vm->flags & XE_VM_FLAG_LR_MODE) {
> - INIT_WORK(&vm->preempt.rebind_work, preempt_rebind_work_func);
> + if (vm->flags & XE_VM_FLAG_LR_MODE)
> vm->batch_invalidate_tlb = false;
> - }
>
> /* Fill pt_root after allocating scratch tables */
> for_each_tile(tile, xe, id) {
> --
> 2.49.0
>
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