On Mon, Apr 3, 2017 at 4:32 AM, Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
> Atomic code rely shouldn't rely on the magic hidden acquire context.
Repeated rely in commit message. I'm assuming you mean:
"Atomic code shouldn't rely on the magic hidden acquire context."
>
> v2: Remove unused config local var (gcc).
>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 16 ++++++++++++----
> 1 file changed, 12 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 8999da789bb0..978dd8f49476 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -2623,14 +2623,22 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state);
> int drm_atomic_helper_resume(struct drm_device *dev,
> struct drm_atomic_state *state)
> {
> - struct drm_mode_config *config = &dev->mode_config;
> + struct drm_modeset_acquire_ctx ctx;
> int err;
>
> drm_mode_config_reset(dev);
>
> - drm_modeset_lock_all(dev);
> - err = drm_atomic_helper_commit_duplicated_state(state, config->acquire_ctx);
> - drm_modeset_unlock_all(dev);
> + drm_modeset_acquire_init(&ctx, 0);
> + while (1) {
> + err = drm_atomic_helper_commit_duplicated_state(state, &ctx);
> + if (err != -EDEADLK)
> + break;
> +
> + drm_modeset_backoff(&ctx);
> + }
> +
> + drm_modeset_drop_locks(&ctx);
> + drm_modeset_acquire_fini(&ctx);
>
> return err;
> }
> --
> 2.11.0
>
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