* [PATCH] drm/amdgpu/display: fix ref count leak when pm_runtime_get_sync fails
@ 2020-06-14 7:05 Navid Emamdoost
0 siblings, 0 replies; only message in thread
From: Navid Emamdoost @ 2020-06-14 7:05 UTC (permalink / raw)
To: Alex Deucher, Christian König, David Airlie, Daniel Vetter,
Lyude Paul, Ville Syrjälä,
José Roberto de Souza, Andrzej Pietrasiewicz,
Navid Emamdoost, amd-gfx, dri-devel, linux-kernel
Cc: emamd001, wu000273, kjlu, smccaman
The call to pm_runtime_get_sync increments the counter even in case of
failure, leading to incorrect ref count.
In case of failure, decrement the ref count before returning.
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
index f355d9a752d2..a1aec205435d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
@@ -716,8 +716,10 @@ amdgpu_connector_lvds_detect(struct drm_connector *connector, bool force)
if (!drm_kms_helper_is_poll_worker()) {
r = pm_runtime_get_sync(connector->dev->dev);
- if (r < 0)
+ if (r < 0) {
+ pm_runtime_put_autosuspend(connector->dev->dev);
return connector_status_disconnected;
+ }
}
if (encoder) {
@@ -854,8 +856,10 @@ amdgpu_connector_vga_detect(struct drm_connector *connector, bool force)
if (!drm_kms_helper_is_poll_worker()) {
r = pm_runtime_get_sync(connector->dev->dev);
- if (r < 0)
+ if (r < 0) {
+ pm_runtime_put_autosuspend(connector->dev->dev);
return connector_status_disconnected;
+ }
}
encoder = amdgpu_connector_best_single_encoder(connector);
@@ -977,8 +981,10 @@ amdgpu_connector_dvi_detect(struct drm_connector *connector, bool force)
if (!drm_kms_helper_is_poll_worker()) {
r = pm_runtime_get_sync(connector->dev->dev);
- if (r < 0)
+ if (r < 0) {
+ pm_runtime_put_autosuspend(connector->dev->dev);
return connector_status_disconnected;
+ }
}
if (!force && amdgpu_connector_check_hpd_status_unchanged(connector)) {
@@ -1328,8 +1334,10 @@ amdgpu_connector_dp_detect(struct drm_connector *connector, bool force)
if (!drm_kms_helper_is_poll_worker()) {
r = pm_runtime_get_sync(connector->dev->dev);
- if (r < 0)
+ if (r < 0) {
+ pm_runtime_put_autosuspend(connector->dev->dev);
return connector_status_disconnected;
+ }
}
if (!force && amdgpu_connector_check_hpd_status_unchanged(connector)) {
--
2.17.1
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