This is a note to let you know that I've just added the patch titled
drm/rockchip: dw-mipi-dsi: fix possible un-balanced runtime PM enable
to the 4.14-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-rockchip-dw-mipi-dsi-fix-possible-un-balanced-runtime-pm-enable.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Feb 1 13:45:42 CET 2018
From: Mirza Krak <mirza.krak@xxxxxxxxx>
Date: Wed, 15 Nov 2017 08:24:46 +0000
Subject: drm/rockchip: dw-mipi-dsi: fix possible un-balanced runtime PM enable
From: Mirza Krak <mirza.krak@xxxxxxxxx>
[ Upstream commit 517f56839f581618d24f2e67a35738a5c6cbaecb ]
In the case where the bind gets deferred we would end up with a
un-balanced runtime PM enable call.
Fix this by simply moving the pm_runtime_enable call to the end of
the bind function when all paths have succeeded.
Signed-off-by: Mirza Krak <mirza.krak@xxxxxxxxx>
Signed-off-by: Sandy Huang <hjc@xxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/1510734286-37434-1-git-send-email-mirza.krak@xxxxxxxxx
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -1275,8 +1275,6 @@ static int dw_mipi_dsi_bind(struct devic
goto err_pllref;
}
- pm_runtime_enable(dev);
-
dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
dsi->dsi_host.dev = dev;
ret = mipi_dsi_host_register(&dsi->dsi_host);
@@ -1291,6 +1289,7 @@ static int dw_mipi_dsi_bind(struct devic
}
dev_set_drvdata(dev, dsi);
+ pm_runtime_enable(dev);
return 0;
err_mipi_dsi_host:
Patches currently in stable-queue which might be from mirza.krak@xxxxxxxxx are
queue-4.14/drm-rockchip-dw-mipi-dsi-fix-possible-un-balanced-runtime-pm-enable.patch