This is a note to let you know that I've just added the patch titled
drm/msm/dp: fix runtime PM leak on connect failure
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-connect-failure.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 e86750b01a1560f198e4b3e21bb3f78bfd5bb2c3 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Wed, 13 Mar 2024 17:43:06 +0100
Subject: drm/msm/dp: fix runtime PM leak on connect failure
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
commit e86750b01a1560f198e4b3e21bb3f78bfd5bb2c3 upstream.
Make sure to balance the runtime PM usage counter (and suspend) before
returning on connect failures (e.g. DPCD read failures after a spurious
connect event or if link training fails).
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/582746/
Link: https://lore.kernel.org/r/20240313164306.23133-3-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
@@ -598,6 +598,7 @@ static int dp_hpd_plug_handle(struct dp_
ret = dp_display_usbpd_configure_cb(&pdev->dev);
if (ret) { /* link train failed */
dp->hpd_state = ST_DISCONNECTED;
+ pm_runtime_put_sync(&pdev->dev);
} else {
dp->hpd_state = ST_MAINLINK_READY;
}
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
