drm/radeon: fix multiple reference count leak

[ Upstream commit 6f2e8acdb48ed166b65d47837c31b177460491ec ]

On calling pm_runtime_get_sync() the reference count of the device
is incremented. In case of failure, decrement the
reference count before returning the error.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index bebcef2ce6b880e887771ac24446d2fc2e76ac0e..a9f1d99bb6f9910efa678dedcbbe02a91ee41a7f 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -886,8 +886,10 @@ radeon_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) {
@@ -1021,8 +1023,10 @@ radeon_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 = radeon_best_single_encoder(connector);
@@ -1158,8 +1162,10 @@ radeon_tv_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 = radeon_best_single_encoder(connector);
@@ -1241,8 +1247,10 @@ radeon_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 (radeon_connector->detected_hpd_without_ddc) {
@@ -1681,8 +1689,10 @@ radeon_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 && radeon_check_hpd_status_unchanged(connector)) {