[PATCH 3/3] drm/probe-helper: Do not fail from drmm_kms_helper_poll_init()

[Thomas Zimmermann]

Failing to set up connector polling is not significant enough to
fail device probing. Print a warning and return nothing from the
init helper.

This only affects the managed init function. The unmanaged init
already never fails with an error.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/ast/ast_mode.c     |  5 +----
 drivers/gpu/drm/drm_probe_helper.c | 11 ++++++-----
 include/drm/drm_probe_helper.h     |  2 +-
 3 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index c3b950675485..4f2543730b97 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1018,10 +1018,7 @@ int ast_mode_config_init(struct ast_device *ast)
 		return ret;
 
 	drm_mode_config_reset(dev);
-
-	ret = drmm_kms_helper_poll_init(dev);
-	if (ret)
-		return ret;
+	drmm_kms_helper_poll_init(dev);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 7ba16323e7c2..6b3541159c0f 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -958,15 +958,16 @@ static void drm_kms_helper_poll_init_release(struct drm_device *dev, void *res)
  * cleaned up when the DRM device goes away.
  *
  * See drm_kms_helper_poll_init() for more information.
- *
- * Returns:
- * 0 on success, or a negative errno code otherwise.
  */
-int drmm_kms_helper_poll_init(struct drm_device *dev)
+void drmm_kms_helper_poll_init(struct drm_device *dev)
 {
+	int ret;
+
 	drm_kms_helper_poll_init(dev);
 
-	return drmm_add_action_or_reset(dev, drm_kms_helper_poll_init_release, dev);
+	ret = drmm_add_action_or_reset(dev, drm_kms_helper_poll_init_release, dev);
+	if (ret)
+		drm_warn(dev, "Connector status will not be updated, error %d\n", ret);
 }
 EXPORT_SYMBOL(drmm_kms_helper_poll_init);
 
diff --git a/include/drm/drm_probe_helper.h b/include/drm/drm_probe_helper.h
index d6ce7b218b77..840ae5f798c2 100644
--- a/include/drm/drm_probe_helper.h
+++ b/include/drm/drm_probe_helper.h
@@ -17,7 +17,7 @@ int drm_helper_probe_detect(struct drm_connector *connector,
 			    struct drm_modeset_acquire_ctx *ctx,
 			    bool force);
 
-int drmm_kms_helper_poll_init(struct drm_device *dev);
+void drmm_kms_helper_poll_init(struct drm_device *dev);
 void drm_kms_helper_poll_init(struct drm_device *dev);
 void drm_kms_helper_poll_fini(struct drm_device *dev);
 bool drm_helper_hpd_irq_event(struct drm_device *dev);
-- 
2.48.1