This is a note to let you know that I've just added the patch titled
drm/msm/dsi: Use pm_runtime_resume_and_get to prevent refcnt leaks
to the 5.4-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-dsi-use-pm_runtime_resume_and_get-to-prevent.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5a3291037b3c334a32c5751f41b99f6aa33b0f0e
Author: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Date: Tue Jun 20 13:43:20 2023 +0200
drm/msm/dsi: Use pm_runtime_resume_and_get to prevent refcnt leaks
[ Upstream commit 3d07a411b4faaf2b498760ccf12888f8de529de0 ]
This helper has been introduced to avoid programmer errors (missing
_put calls leading to dangling refcnt) when using pm_runtime_get, use it.
While at it, start checking the return value.
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Fixes: 5c8290284402 ("drm/msm/dsi: Split PHY drivers to separate files")
Patchwork: https://patchwork.freedesktop.org/patch/543350/
Link: https://lore.kernel.org/r/20230620-topic-dsiphy_rpm-v2-1-a11a751f34f0@xxxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index 08a95c3a9444..1582386fe162 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -464,7 +464,9 @@ static int dsi_phy_enable_resource(struct msm_dsi_phy *phy)
struct device *dev = &phy->pdev->dev;
int ret;
- pm_runtime_get_sync(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ return ret;
ret = clk_prepare_enable(phy->ahb_clk);
if (ret) {
