[Intel-gfx] [bug report] drm/i915: Use the async worker to avoid reclaim tainting the ggtt->mutex

[Chris Wilson]

Quoting Dan Carpenter (2020-05-07 10:17:14)
> Hello Chris Wilson,
> 
> The patch e3793468b466: "drm/i915: Use the async worker to avoid
> reclaim tainting the ggtt->mutex" from Jan 30, 2020, leads to the
> following static checker warning:
> 
>         drivers/gpu/drm/i915/i915_vma.c:356 i915_vma_wait_for_bind()
>         warn: 's64max' cannot fit into 'bool'
> 
> drivers/gpu/drm/i915/i915_vma.c
>    345  int i915_vma_wait_for_bind(struct i915_vma *vma)
>    346  {
>    347          int err = 0;
>    348  
>    349          if (rcu_access_pointer(vma->active.excl.fence)) {
>    350                  struct dma_fence *fence;
>    351  
>    352                  rcu_read_lock();
>    353                  fence = dma_fence_get_rcu_safe(&vma->active.excl.fence);
>    354                  rcu_read_unlock();
>    355                  if (fence) {
>    356                          err = dma_fence_wait(fence, MAX_SCHEDULE_TIMEOUT);
>                                                             ^^^^^^^^^^^^^^^^^^^^
> The dma_fence_wait() takes a bool, not a timeout value.

Fortuitously becomes the same thing, an indefinite interruptible wait.

Accidentally fixed in a queued patch.
-Chris