[PATCH 2/5] drm/panthor: Be robust against runtime PM resume failures in the suspend path

[Boris Brezillon]

On Wed, 13 Nov 2024 16:42:54 +0100
Boris Brezillon <boris.brezillon at collabora.com> wrote:

> @@ -541,17 +547,4 @@ int panthor_device_suspend(struct device *dev)
>  	clk_disable_unprepare(ptdev->clks.core);
>  	atomic_set(&ptdev->pm.state, PANTHOR_DEVICE_PM_STATE_SUSPENDED);
>  	return 0;
> -
> -err_set_active:
> -	/* If something failed and we have to revert back to an
> -	 * active state, we also need to clear the MMIO userspace
> -	 * mappings, so any dumb pages that were mapped while we
> -	 * were trying to suspend gets invalidated.
> -	 */
> -	mutex_lock(&ptdev->pm.mmio_lock);
> -	atomic_set(&ptdev->pm.state, PANTHOR_DEVICE_PM_STATE_ACTIVE);
> -	unmap_mapping_range(ptdev->base.anon_inode->i_mapping,
> -			    DRM_PANTHOR_USER_MMIO_OFFSET, 0, 1);
> -	mutex_unlock(&ptdev->pm.mmio_lock);
> -	return ret;
>  }

This chunk should be in patch 3.