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drm/amdgpu/display: fix ref count leak when pm_runtime_get_sync fails

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[ Upstream commit f79f94765f8c39db0b7dec1d335ab046aac03f20 ]

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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Navid Emamdoost 2020-06-14 02:05:28 -05:00 • committed by Greg Kroah-Hartman
commit f93736e489
1 changed files with 12 additions and 4 deletions
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16
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
View file

@ -718,8 +718,10 @@ 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) {
@ -856,8 +858,10 @@ 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);
@ -979,8 +983,10 @@ 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)) {
@ -1329,8 +1335,10 @@ 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)) {