* [PATCH] drm: bridge: cdns-mhdp8546: fix reference leak in cdns_mhdp_probe
@ 2020-11-27 9:44 Qinglang Miao
0 siblings, 0 replies; only message in thread
From: Qinglang Miao @ 2020-11-27 9:44 UTC (permalink / raw)
To: Andrzej Hajda, Neil Armstrong, Laurent Pinchart, Jonas Karlman,
Jernej Skrabec, David Airlie, Daniel Vetter
Cc: dri-devel, linux-kernel, Qinglang Miao
pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to putting operation will result in a
reference leak here.
A new function pm_runtime_resume_and_get is introduced in
[0] to keep usage counter balanced. So We fix the reference
leak by replacing it with new funtion.
[0] dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
Fixes: fb43aa0acdfd ("drm: bridge: Add support for Cadence MHDP8546 DPI/DP bridge")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
---
drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index d0c65610e..3ee515d21 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -2369,7 +2369,7 @@ static int cdns_mhdp_probe(struct platform_device *pdev)
clk_prepare_enable(clk);
pm_runtime_enable(dev);
- ret = pm_runtime_get_sync(dev);
+ ret = pm_runtime_resume_and_get(dev);
if (ret < 0) {
dev_err(dev, "pm_runtime_get_sync failed\n");
pm_runtime_disable(dev);
--
2.23.0
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