diff mbox series

[2/2] drm: Check polling initialized before enabling in drm_helper_probe_single_connector_modes

Message ID 20240503154559.438300-3-timg@tpi.com
State New
Headers show
Series Azure: Fix hibernation failure | expand

Commit Message

Tim Gardner May 3, 2024, 3:45 p.m. UTC 
From: Shradha Gupta <shradhagupta@linux.microsoft.com>

BugLink: https://bugs.launchpad.net/bugs/2064740

In function drm_helper_probe_single_connector_modes() when we enable
polling again, if it is already uninitialized, a warning is reported.
This patch fixes the warning message by checking if poll is initialized
before enabling it.

Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202401191128.db8423f1-oliver.sang@intel.com
Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1706856224-9725-1-git-send-email-shradhagupta@linux.microsoft.com
(cherry picked from commit 048a36d8a6085bbd8ab9e5794b713b92ac986450)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---
 drivers/gpu/drm/drm_probe_helper.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 249eb8d8bd6b..cb9073a5f791 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -622,8 +622,12 @@  int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 					 0);
 	}
 
-	/* Re-enable polling in case the global poll config changed. */
-	drm_kms_helper_poll_enable(dev);
+	/*
+	 * Re-enable polling in case the global poll config changed but polling
+	 * is still initialized.
+	 */
+	if (dev->mode_config.poll_enabled)
+		drm_kms_helper_poll_enable(dev);
 
 	if (connector->status == connector_status_disconnected) {
 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",