This is a note to let you know that I've just added the patch titled
drm/msm/dp: fix runtime PM leak on disconnect
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-dp-fix-runtime-pm-leak-on-disconnect.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0640f47b742667fca6aac174f7cd62b6c2c7532c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Wed, 13 Mar 2024 17:43:05 +0100
Subject: drm/msm/dp: fix runtime PM leak on disconnect
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
commit 0640f47b742667fca6aac174f7cd62b6c2c7532c upstream.
Make sure to put the runtime PM usage count (and suspend) also when
receiving a disconnect event while in the ST_MAINLINK_READY state.
This specifically avoids leaking a runtime PM usage count on every
disconnect with display servers that do not automatically enable
external displays when receiving a hotplug notification.
Fixes: 5814b8bf086a ("drm/msm/dp: incorporate pm_runtime framework into DP driver")
Cc: stable@xxxxxxxxxxxxxxx # 6.8
Cc: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/582744/
Link: https://lore.kernel.org/r/20240313164306.23133-2-johan+linaro@xxxxxxxxxx
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/dp/dp_display.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -655,6 +655,7 @@ static int dp_hpd_unplug_handle(struct d
dp_display_host_phy_exit(dp);
dp->hpd_state = ST_DISCONNECTED;
dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
+ pm_runtime_put_sync(&pdev->dev);
mutex_unlock(&dp->event_mutex);
return 0;
}
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-6.8/drm-msm-dp-fix-runtime-pm-leak-on-disconnect.patch
queue-6.8/drm-msm-dp-fix-runtime-pm-leak-on-connect-failure.patch
