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Subject[PATCH AUTOSEL 5.10 031/137] drm/vc4: hdmi: Fix PM reference leak in vc4_hdmi_encoder_pre_crtc_co()
Date
From: Zou Wei <zou_wei@huawei.com>

[ Upstream commit 5e4322a8b266bc9f5ee7ea4895f661c01dbd7cb3 ]

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/1621840854-105978-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 88a8cb840cd5..22e0757cce95 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -627,7 +627,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder)
unsigned long pixel_rate, hsm_rate;
int ret;

- ret = pm_runtime_get_sync(&vc4_hdmi->pdev->dev);
+ ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
if (ret < 0) {
DRM_ERROR("Failed to retain power domain: %d\n", ret);
return;
--
2.30.2
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