From: Danny Wood <danwood76@gmail.com>
Date: Thu, 4 Jul 2019 17:39:17 +0000 (+0100)
Subject: libdisplay: backport acquireFenceFd close check from SM-N935S blob to stop potential... 
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=181817b632c63ba05c798f0f88ec3304a80e721f;p=GitHub%2FLineageOS%2Fandroid_hardware_samsung_slsi_exynos.git

libdisplay: backport acquireFenceFd close check from SM-N935S blob to stop potential Fd leak

Change-Id: I6459575717a03ae8522e4d083edf0aad49724092
---

diff --git a/libdisplay/ExynosOverlayDisplay.cpp b/libdisplay/ExynosOverlayDisplay.cpp
index 2f12a25..33335ec 100644
--- a/libdisplay/ExynosOverlayDisplay.cpp
+++ b/libdisplay/ExynosOverlayDisplay.cpp
@@ -858,6 +858,18 @@ int ExynosOverlayDisplay::set(hwc_display_contents_1_t* contents)
 
     mHwc->hwc_ctrl.max_num_ovly = mAllowedOverlays;
 
+    for (size_t i = 0; i < contents->numHwLayers; i++) {
+        hwc_layer_1_t &layer = contents->hwLayers[i];
+        /* If Fb is not needed and this is a HWC buffer (function reverse engineered from S7 libexynosdisplay.so) */
+        if(!mFbNeeded && layer.compositionType == HWC_FRAMEBUFFER_TARGET) {
+            /* Close the acquire fence Fd if it is valid */
+            if(layer.acquireFenceFd >= 0) {
+                close(layer.acquireFenceFd);
+                layer.acquireFenceFd = -1;
+            }
+        }
+    }
+
     return err;
 }