drm/xe: Drop remove callback support

Now that devres supports component driver cleanup during driver removal
cleanup, the xe custom support for removal callbacks is not needed
anymore. Drop it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250222001051.3012936-7-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/xe_device.c

@@ -65,12 +65,6 @@
 
 #include <generated/xe_wa_oob.h>
 
-struct xe_device_remove_action {
-	struct list_head node;
-	void (*action)(void *);
-	void *data;
-};
-
 static int xe_file_open(struct drm_device *dev, struct drm_file *file)
 {
 	struct xe_device *xe = to_xe_device(dev);
@@ -752,9 +746,6 @@ int xe_device_probe(struct xe_device *xe)
 	int err;
 	u8 id;
 
-	xe->probing = true;
-	INIT_LIST_HEAD(&xe->remove_action_list);
-
 	xe_pat_init_early(xe);
 
 	err = xe_sriov_init(xe);
@@ -904,8 +895,6 @@ int xe_device_probe(struct xe_device *xe)
 
 	xe_vsec_init(xe);
 
-	xe->probing = false;
-
 	return devm_add_action_or_reset(xe->drm.dev, xe_device_sanitize, xe);
 
 err_unregister_display:
@@ -916,61 +905,6 @@ int xe_device_probe(struct xe_device *xe)
 	return err;
 }
 
-/**
- * xe_device_call_remove_actions - Call the remove actions
- * @xe: xe device instance
- *
- * This is only to be used by xe_pci and xe_device to call the remove actions
- * while removing the driver or handling probe failures.
- */
-void xe_device_call_remove_actions(struct xe_device *xe)
-{
-	struct xe_device_remove_action *ra, *tmp;
-
-	list_for_each_entry_safe(ra, tmp, &xe->remove_action_list, node) {
-		ra->action(ra->data);
-		list_del(&ra->node);
-		kfree(ra);
-	}
-
-	xe->probing = false;
-}
-
-/**
- * xe_device_add_action_or_reset - Add an action to run on driver removal
- * @xe: xe device instance
- * @action: Function that should be called on device remove
- * @data: Pointer to data passed to @action implementation
- *
- * This adds a custom action to the list of remove callbacks executed on device
- * remove, before any dev or drm managed resources are removed.  This is only
- * needed if the action leads to component_del()/component_master_del() since
- * that is not compatible with devres cleanup.
- *
- * Returns: 0 on success or a negative error code on failure, in which case
- * @action is already called.
- */
-int xe_device_add_action_or_reset(struct xe_device *xe,
-				  void (*action)(void *), void *data)
-{
-	struct xe_device_remove_action *ra;
-
-	drm_WARN_ON(&xe->drm, !xe->probing);
-
-	ra = kmalloc(sizeof(*ra), GFP_KERNEL);
-	if (!ra) {
-		action(data);
-		return -ENOMEM;
-	}
-
-	INIT_LIST_HEAD(&ra->node);
-	ra->action = action;
-	ra->data = data;
-	list_add(&ra->node, &xe->remove_action_list);
-
-	return 0;
-}
-
 void xe_device_remove(struct xe_device *xe)
 {
 	xe_display_unregister(xe);
@@ -980,8 +914,6 @@ void xe_device_remove(struct xe_device *xe)
 	xe_display_driver_remove(xe);
 
 	xe_heci_gsc_fini(xe);
-
-	xe_device_call_remove_actions(xe);
 }
 
 void xe_device_shutdown(struct xe_device *xe)

drivers/gpu/drm/xe/xe_device.h

@@ -45,9 +45,6 @@ struct xe_device *xe_device_create(struct pci_dev *pdev,
 				   const struct pci_device_id *ent);
 int xe_device_probe_early(struct xe_device *xe);
 int xe_device_probe(struct xe_device *xe);
-int xe_device_add_action_or_reset(struct xe_device *xe,
-				  void (*action)(void *), void *data);
-void xe_device_call_remove_actions(struct xe_device *xe);
 void xe_device_remove(struct xe_device *xe);
 void xe_device_shutdown(struct xe_device *xe);
 

drivers/gpu/drm/xe/xe_device_types.h

@@ -428,20 +428,6 @@ struct xe_device {
 	/** @tiles: device tiles */
 	struct xe_tile tiles[XE_MAX_TILES_PER_DEVICE];
 
-	/**
-	 * @remove_action_list: list of actions to execute on device remove.
-	 * Use xe_device_add_remove_action() for that. Actions can only be added
-	 * during probe and are executed during the call from PCI subsystem to
-	 * remove the driver from the device.
-	 */
-	struct list_head remove_action_list;
-
-	/**
-	 * @probing: cover the section in which @remove_action_list can be used
-	 * to post cleaning actions
-	 */
-	bool probing;
-
 	/**
 	 * @mem_access: keep track of memory access in the device, possibly
 	 * triggering additional actions when they occur.

drivers/gpu/drm/xe/xe_pci.c

@@ -895,10 +895,8 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return err;
 
 	err = xe_device_probe(xe);
-	if (err) {
-		xe_device_call_remove_actions(xe);
+	if (err)
 		return err;
-	}
 
 	err = xe_pm_init(xe);
 	if (err)